STAATSKOERANT, 22 APRIL 2016 No. 39943 653
DEPARTMENT OF WATER AND SANITATION NO. 469 22 APRIL 2016 469 National Water Act (36/1998): Classes and Resource Quality Objectives of Water Resources for Catchments of the Middle Vaal 39943
NATIONAL WATER ACT, 1998 (ACT NO.36 OF 1998)
CLASSES AND RESOURCE QUALITY OBJECTIVES OF WATER RESOURCES FOR CATCHMENTS OF THE MIDDLE VAAL
I, Nomvula Paula Mokonyane, in my capacity as Minister of Water and Sanitation, and duly authorised in terms of section 13(4) of the National Water Act (Act No. 36 of 1998) hereby publish the notices for the classes of water resources and resource quality objectives for catchments of the Middle Vaal, in the Schedule, to be issued under section 13(4) of the National Water Act (Act No. 36 of 1998).
Acting Director: Water Resource Classification Attention: Ms Lebogang Matlala Department of Water and Sanitation Ndinaye Building 178 Francis Baard Street Private Bag X313 Pretoria 0001
E-mail: [email protected] Facsimile: 012 336 6712
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SCHEDULE
CLASSES AND RESOURCE QUALITY OBJECTIVES OF WATER RESOURCES FOR CATCHMENTS OF THE MIDDLE VAAL IN TERMS OF SECTION 13(1)(A) AND (B) OF THE NATIONAL WATER ACT (ACT NO.36 OF 1998)
1 DESCRIPTION OF WATER RESOURCE
1. The classes and resource quality objectives are determined for all or part of every significant water resource within the catchments of the Middle Vaal as set out below:
Water Management Area: Vaal Drainage Region: C Primary Drainage Region River(s): Vaal River System ( Vaal, Renoster, Vals, Schoonspruit, Koekemoerspruit, Sand and Vet Systems)
2. The Minister has, in terms of section 12 of the National Water Act, Act No 36 of 1998 (the Act), prescribed a system for classifying water resources by promulgating Regulation 810, Government Gazette 33541 dated 17 September 2010. In terms of section 13(1) of the Act the Minister must, as soon as reasonably practicable after the Minister has prescribed a system for classifying water resources and subject to subsection (4), by notice in the Gazette, determine for all or part of every significant water resource, a class in accordance with the prescribed classification system.
3. The Minister, in terms of section 13(1)(a) of the Act, has determined the following classes of each significant water resource for catchments of the Middle Vaal.
4. The Minister, in terms of section 13(1)(b) of the Act, has determined the following resource quality objectives for each significant water resource for catchment of the Middle Vaal.
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2. DETERMINATION OF THE CLASS OF WATER RESOURCE AND RESOURCE QUALITY OBJECTIVES IN TERMS OF SECTION 13(1)(A) AND (B) OF THE NATIONAL WATER ACT (ACT NO.36 OF 1998)
1. A summary of the water resource classes for Integrated Units of Analysis (Figure 1) and ecological categories for the Middle Vaal is set out in Table 1.
2. Integrated Units of Analysis (IUA) are classified in terms of their extent of permissible utilization and protection as either Class I: indicating high environmental protection and minimal utilization; or Class II indicating moderate protection and moderate utilization; and Class III indicating sustainable minimal protection and high utilization.
3. Resource Quality Objectives (RQO) are defined for each prioritised resource unit (RU) (Table 2 and Figure 2) for every IUA in terms of water quantity, quality, habitat and biota as shown in Table 3 – 11 respectively.
4. Where specified, the ecological category or Recommended Ecological Category (REC) means the assigned ecological condition by the Minister to a water resource that reflects the ecological condition of that water resource in terms of the deviation of its biophysical components from a predevelopment condition.
5. RQO are applicable upon the date of approval by the Minister, unless otherwise specified.
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C C C C C C C C C C C D D C C C C C C D C B/C B/C C/D C/D C/D C/D C/D C/D Ecological Category Recommended
C C C C C C C C C C C D C C C C C C D C
B/C D/E B/C C/D C/D C/D C/D C/D C/D Present State Ecological
/a)
3
8.2 66.4 2.11 7.86 60.6 19.5 5.24 3.87 4.75 81.86 25.55 18.46 63.86 93.14 17.94 31.24 131.7 26.19 19.26 72.01 120.92 145.79 105.52 117.31 104.16 180.27 190.94 413.55 2546.42 Natural MAR (million m ) 2
81 Gross 881 613 422 860 349 839 499 734 159 864
2215 2083 2413 4092 1152 5868 4898 5930 1350 2020 2694 3503 3974 7555 2113 5551 62305 16040
Area (km Area Catchment
Tributary Name Tributary and Ecological Categories per Biophysical Node Biophysical per Categories Ecological and ufonteinspruit
Renoster River Renoster River Le e Renoster River Doringspruit Renoster River Heuningspruit Renoster River Vals River Elandsspruit/Elands Vals River Vals River Schoonspruit Taaibosspruit Schoonspruit Schoonspruit Koekemoerspruit Jagspruit Sand River Sand River Koolspruit Sand River Vet River Klein Vet River Soutspruit Vet River Vet River
nalysis nalysis
A
River Name
Major River Vaal River Renoster River Renoster River Vaal River Renoster River Vaal River Renoster River Vaal River Vaal River Vals River Vaal River Vaal River Vaal River Vaal River Vaal River Vaal River Vaal River Schoonspruit Vet River Vet Sand River Vet River Vaal River Vet River/Erfenis Klein Vet River Vaal River Vaal River Vaal River Vaal River nit of of nit U
C60J C24J C42L C70F C24F C42F C41E C70A C70K C60A C24A C41E C43A C24B C70B C42D C70C C70D C70D C70H C60C C24C C24H C24H C41D C41H C60G C24G C42G ntegrated ntegrated Quaternary Quaternary Catchment
MF.1 MA.1 MA.2 MA.3 MA.4 MA.5 MA.6 MA.7 MA.8 MB.1 MB.2 MB.3 MC.1 MC.2 MC.3 MC.4 MC.5 MC.6 ME1.1 ME1.2 ME1.3 ME2.1 MD1.1 MD2.1 MD2.2 MD2.3 Biophysi EWR14 EWR15 EWR12 Name cal Node cal Node
II II III III III III III III Water IUA Class for Resource
Water Resource Classes per I per Classes Resource Water
Water Resource Classes of the Middle Vaal Vaal Middle the of Classes Resource Water
1.
(IUA) 1: Table Integrated
Unit of Analysis Unit of Analysis Renoster River (MA) Vals River (MB) Schoonspruit (MC) River Upper Sand River (MD1) River Sand Lower (MD2) Upper Vet River (ME1) Vet RiverLower (ME2) Vaal from River Renoster River
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C/D
C/D
2714.89
70809
Klipspruit
Vaal River
C25A
EWR13
confluence to to confluence Dam Bloemhof (MF)
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Table 2: Resource Units delineated for the Middle Vaal WMA
Resource Quaternary Description Unit Catchment INTEGRATED UNITS OF ANALYSIS: VAAL RIVER (MF) VB1.1 Vaal River mainstem: Vermaasdrift to upstream of the Schoon spruit confluence C24B Vaal River mainstem: From the Schoonspruit confluence to just upstream of the Vals River VB1.2 C24J confluence VB1.3 Vaal River mainstem: From Vals River confluence to Bloemhof Dam C25C, C25F VB2 Tributary catchments (Vierfonteinspruit and C24J –south of Vaal River) C24B, C24J Ysterspruit, Matjiespruit, Klipspruit, Wolwespruit and Makwassiespruit tributary catchments C24J, C25A, C25C, VB3 C25D Sandspruit tributary catchment C25C, C25B, C25F, VB4 C43B VB5 Bamboespruit tributary catchment C25E VB6 Bloemhof Dam C25E, C25F, C43D TRIBUTARIES INTEGRATED UNITS OF ANALYSIS: RENOSTER RIVER (MA) R2 Downstream Vaalbankspruit tributary confluences to Koppies Dam C70C R3 Koppies Dam C70C Downstream Koppies Dam to confluence with the Heuningspruit C70E, C70D, C70F, R4 C70G, C70H R5 Downstream Heuningspruit confluence to confluence with the Vaal River C70J, C70K INTEGRATED UNITS OF ANALYSIS MB: VALS RIVER C60B, C60C, C60D, V2 Downstream Pauciflora Spruit confluence to Kroonstad C60E, C60F V3 Serfontein Dam C60D V4 Middelspruit tributary catchment C60H V5 From the Kroonval weir to the Vaal River confluence C60G, C60J INTEGRATED UNITS OF ANALYSIS: SCHOONSPRUIT (MC) SK1 From origin of Koekemoerspruit to confluence with Vaal River C24A, C24B SK2 Schoonspruit eye C24C SK3 Taaibospruit tributary catchment C24F SK4 From Schoonspruit eye to Kaalspruit confluence C24D, C24E SK5 Kaalspruit and Buisfonteinspruit tributary catchment C24G SK6 Johan Neser Dam (Klerksdorp Dam) C24G SK7 From Johan Neser Dam to confluence with the Vaal River C24H INTEGRATED UNITS OF ANALYSIS: UPPER SAND RIVER (MD1) US2 Downstream Klipspruit confluence to Allemanskraal Dam C42D, C42E US3 Allemanskraal Dam C42E INTEGRATED UNITS OF ANALYSIS: LOWER SAND RIVER (MD2) LS1 Allemanskraal Dam to Merriespruit confluence C42F, C42G, C42H, LS2 Rietspruit tributary catchment C42J LS3 Downstream Rietspruit confluence to confluence with the Vet River C42K, C42L, C43B INTEGRATED UNITS OF ANALYSIS: UPPER VET RIVER (ME1) UV1 Klein Vet and Laaispruit tributary catchments C41A, C41B UV2 Origin of Vet River and Leeuspruit tributary catchment to Erfenis Dam C41C, C41D UV3 Soutspruit tributary catchment C41E UV4 Erfenis Dam C41E INTEGRATED UNITS OF ANALYSIS : LOWER VET RIVER (ME2) Erfernis Dam to confluence with Sand River C41F, C41G, LV1 C41H, C41J Downstream Sand River confluence to Bloemhof Dam C43A, C43C, LV2 C43D
3
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MA Renoster River
MD2 Lower Sand River
ME1 Upper Vet River
10 5 0 10 20 30 40 PROJECT Major Rivers - NFEPA MD1 - Upper Sand River I 1 I RiWiwtxs MIDDLE VAAL Dams MD2 - Lower Sand River 11 MA - Renoster River = ME 1- Upper Vet River MIDDLE VAAL CATCHMENT MB - Vals River ME2 - Lower Vet River IDAS MC -SchoonspruitRiver MF - Vaal River from Renoster confluence to Bloemhof Dam CIS MA 11A P2014 PRCECTNa 1961431 REFERENCE CHECK DM 1240E4014 SCALE 11900000
Cooed.. System: GCS MSS 1984 dovnreswy so. Amn, REVIEW PMIZOOPOIa AS I REJO
Figure 1: Integrated Units of Analysis defined in the Middle Vaal WMA
4
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9 IL rilpOpo
NOCC Vest -
:ree State ( (,
E
LEGEND REsouRcEraOlES
5 o 10 20 PROJK7 MV EWR Saes l= MA J MD2 lelonNsers MIDDLE VAAL MV Biophysical Nodes MB MEl Major Rivers NFEPA MI MC = ME2 MIDDLE VAAL CATCHMENT =I Resource units 1=1 MDl 1=1 MF RESOURCE UNITS AND IUA Darns GWYN. PROJECT 140 MING REFERENCE GEM 029072014 SGLE 1 1200000
C0a0Nale System 0051051M rEvex FM 02942014 AI I PESO s vms.s.as Pmmeamstal, VaiNAMO21313.,13vostosnyoa.v.P.ounellosILIA, m.
Figure 2: Resource Units and location of Nodes in the Middle Vaal WMA
5
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- - ile 90 99 99 99 99 99 99 90 90 99 99 99 t Per cen
/
cubic cubic second Drought Flows metres 0.0000 0.0000 0.0000 0.0037 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
percentile) percentile) th
- - th percentile)
ile 40 50 60 60 40 40 30 30 30 50 50 30 t th (50 Per cen
percentile)
(50
th
/ (95 Flows
Numerical limit limit Numerical cubic cubic second 0.0172 0.0428 0.0463 0.0597 0.0616 0.0455 0.0243 0.0093 0.0062 0.0049 0.0045 0.0073 metres
Maintenance Low )
percentile) percentile)
milligrams/litre Jul th th Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May 6 Month ≤ (95 (95 ≤milligrams/litre 0.50 (50 milligrams/litre ≤ 0.058 ≤milligrams/litre 0.25 milliSiemens/metre ≤ 55 ≤ counts/100130 millilitres Instream habitat and Riparian Integrity category ≥ C (≥ 62) RENOSTER (
.
measure
of the Virgin Virgin the of
Rapid Habitat Indicator/
Total Ecological WaterTotal Ecological Requirement (node million =MA3) 1.097 cubic metres/annum (51.79% AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Escherichia coli The Assessment Method must be implemented
ntegrated Unit of Analysis
concentration
Objective in the I
Resource Quality Quality Resource The maintenance low flowsflows and drought must to be attained support a healthy condition for the ecosystem and users. Instream ofmust nutrients be to sustain maintained aquatic ecosystem healthto the ensure and prescribed ecological category is met. Instream salinity must maintainedbe support to the aquatic ecosystem and thequality water requirements theof water users. The presence of pathogens should pose to human risk low a health. Instream and Riparian habitat inmusta be moderately modified condition better. or
6
component -
Sub Low flows Low Nutrients Salts Pathogens Instream Habitat
in priority Resource Units
Component Quantity Quality Habitat
S AND DAMS AND S C ategory cological C E
for RIVER
MA 3 Node
R2 Unit Resource Resource
and (C70C) (C70C) Renoster Renoster River/Dam (Tributaries (Tributaries Leeufontein Elandspruit, Wolwespruit) Resource Quality Objectives
: 3
II Class
Table
IUA Renoster
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
/
cubic cubic
second Drought Flows metres 0.0299 0.0231 0.0336 0.0672 0.0248 0.0448 0.0309 0.0261 0.0386 0.0381 0.0351 0.0455
ercentile)
- - percentile) p
ile 60 60 70 80 70 60 60 50 60 60 70 50 t th th Per cen
percentile) r Taxon is>5.0. Taxon r
th
/ Low Flows Low (95 cubic cubic Maintenance
Numerical limit limit Numerical second metres 0.2348 0.5204 0.5604 0.7187 0.7577 0.5892 0.3484 0.1613 0.1181 0.1001 0.0900 0.1246
invertebrate ecologicalcategory:≥ C (≥
- percentile) Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May
th Month milligrams/litre 6
Fish ecologicalcategory: ≥ C (≥ 62) Macro 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C 62) (≥ specified. as requirements flow monthly With 62) (≥ C ≥ category: Quality Water Maintain ensuring category by currentthe C thePe Average Score ≤milligrams/litre 0.50 (50 ≤milligrams/litre 0.015 ≤milligrams/litre 0.25 (50 (50
.
must
current
million .
measure
must be utilized be must
Ecological Water Indicator/
A baseline assessment to determine the integrity of and health the community fish be undertaken Fish Response Assessment Index (FRAI) The integritythe of invertebrate community should be determined using the Macroinvertebrate Response Assessment Index. Conduct aquatic biomonitoring annually using the South African 5 System Scoring methodology. Total Requirement (node =MA4) 18.04 cubic metres/annum (28.82% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen
am should
area forarea fish Objective The d The Resource Quality Quality Resource
Instreammust be biota modified in moderately conditionThe better. or importance as the of RU a refuge habitat and nursery must be ensured. The integritythe of macroinvertebrate the within community must system be maintained. The downstream flow low maintenance requirements node of met tomust be MA 4 support a healthy condition for the ecosystem and users. Concentration of nutrients must be to sustain maintained ecosystem and health qualitywater requirements water of users. maintained in be a mesotrophic state.
7
component -
Sub Fish Aquatic Invertebrates flows Low Nutrients
Component Biota Biota Quantity Quality
C ategory cological C E
MA 3 Node
R3 R2 Unit Resource Resource
and (C70C) (C70C) (C70C) Renoster Renoster River/Dam (Tributaries (Tributaries Leeufontein Elandspruit, Wolwespruit) Koppies Dam Dam Koppies
Class
IUA
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- -
th ile 99 99 99 99 99 99 t Per cen (95
/ cubic cubic second Drought Flows metres 0.0373 0.0617 0.0971 0.0821 0.0661 0.0485
nitoring should
- -
ile
60 70 80 80 70 70 t Per cen
/ Low Flows Low
Maintenance
cubic cubic Numerical limit limit Numerical second metres 0.2808 0.6065 0.6758 0.9039 1.0206 0.8789 biota must be protected.biotamust This be
percentile) aquatic percentile)
- Jan Oct Feb Dec Nov Mar th th Month
(95 ≤milligrams/litre 0.025 milliSiemens/metre ≤ 55 percentile) ≤ counts/100130 millilitres (50
tourism, abstraction ecologicalmust releasesflow and -
measure
al Runoff) Ecological Water Indicator/ Phytoplankton conductivity Electrical Escherichia coli Themonitored fishmust through population be health assessment studies. Suitableshouldbe determined.Mo abundances be conducted annually. Ashouldconducted baseline determine assessment thebe to bird aquatic communitythe dam. around Total Requirement (node million =MA6) 25.413 cubic metres/annum (27.28% Virgin the of Annu Mean Maintenance flows (percentage value of naturalised flow distribution) Drought flows
dam
refuge main fish
Objective
aquatic birdaquatic - salinity in the the in salinity s. water qualitywater Resource Quality Quality Resource quirements theof
The The in maintained be must toorder support ecosystem and health the re downstream water user The presence of pathogens should pose to human risk low a health. supportmettomust be R2 RU maintenance in The requirements flow downstream node MA 4 low of a healthy condition for the ecosystem and users. semi for and a refuge aquatic as theThe importance Dam of includes ecologically and recreationally important species fish and birds. fortheThe importance recreation, Dam eco of be protected. Located the in channel Renoster the of River, provides the dam an important must and area be managed to maintain the upstream species. supportsThe dam a variety of aquatic and semi suitability The species. bird of dam the as habitat must be maintained. The maintenance low flowsflows and drought must to be attained support a healthy condition for the ecosystem and users.
8
component -
Sub Salts Pathogens Dam habitat Fish Aquatic birds flows Low
Component Habitat Biota Quantity
C ategory cological C E
MA 6 Node
R3 R4 Unit Resource Resource
C70H) (C70C) with thewith Renoster Renoster River/Dam C70F, C70G, (Downstream to confluence Koppies Dam (C70D, C70E, Koppies Dam Dam Koppies Heuningspruit)
II Class
IUA
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99 99 99 99 99 99
0.0887 0.0261 0.0502 0.0709 0.0373 0.0579
percentile)
th percentile) 70 60 80 50 60 80
percentile) . th
8.6.
th (50
(95 allowed
Numerical limit limit Numerical n from background from n 0.5698 0.2830 0.1759 0.1434 0.1307 0.1674 percentile) and
milligrams/litre milligrams/litre
th
percentile) percentile) percentile) percentile)
Jul Jun Apr milligrams/litre Sep Aug May th th th th 6 7.4 (5 (95 (95 (50
≤ ≤ 0.5 milligrams/litre (50 milligrams/litre ≤ 0.5 milligrams/litre ≤ 0.058 ≤ 0.50 milliSiemens/metre ≤ 70 variatio A 10% concentration is ≤milligrams/litre 0.072 Instream habitat and Riparian Integrity category ≥ C (≥ 62) (95
.
measure
Indicator/ (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical range pH Turbidity Ammonia Nitrogen as Habitat Rapid The Assessment Method must be implemented
dity
present must health.
to support to
.
be maintainedbe
Objective nstream turbi nstream the quality water must Resource Quality Quality Resource determine the nstream salinity Instream concentration ofmust nutrients be improved to sustain aquatic ecosystem health the and ensure prescribed ecological category is met. I maintainedbe the at current state the aquatic ecosystem and requirements theof users water pH at present state. A baseline assessment to i state is required. The concentrations of toxins should a be at not levelto that is toxic aquatic a organisms and threat human to Instream and Riparian habitat inmusta be moderately modified condition better or
9
component -
Sub Nutrients Salts variables System Toxics Instream Habitat
Component Quality Quality Habitat
C ategory cological C E
MA 6 Node
R4 Unit Resource Resource
C70H) with thewith Renoster Renoster River/Dam C70F, C70G, (Downstream to confluence Koppies Dam (C70D, C70E, Heuningspruit)
II Class
IUA Renoster
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- -
ile 99 99 99 99 99 99 99 99 99 t Per cen 999
cubic cubic
second 0.0373 0.1003 0.1232 0.0821 0.1116 0.0485 0.1427 0.0261 0.0502 0.0709 Drought Flows metres/
62)
- -
ile 60 50 80 90 80 70 70 60 80 90 t Per cen
/
Low Flows Low Maintenance cubic cubic Numerical limit limit Numerical second 0.3226 0.6848 0.7743 1.0600 1.2269 1.0977 0.7311 0.3812 0.2319 0.1871 metres
y ≥ C (≥ 62) (≥ C ≥ y
invertebrate ecologicalcategory:≥ C (≥
- Jul Jan Jun Oct Apr Feb Dec Nov Mar May
Month
Instream habitat and Riparian Integrity categor Fish ecologicalcategory: ≥ C (≥ 62) Macro 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C 62) (≥ specified. as requirements flow monthly With (≥ C ≥ category: Quality Water Maintain ensuring category by currentthe C is>5.0.thePer Taxon Average Score
. If the . If the
of the brate measure be
meets the Conduct aquatic esponse
the Indicator/ nvertebrate community
A baseline assessment to integrity determine the and health fish the of community should be conducted determine to the current state current ecological category recommended C category then the baseline integrity and health must ifmaintained. However the baseline assessment shows current that the meetstate the not does C ecological category then category C the must be met. R Fish Assessment Index utilized. be must (FRAI) integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. WaterTotal Ecological Requirement (node million =MA8) 31.578 cubic metres/annum (26.12% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution)
to
for
Objective
Resource Quality Quality Resource
Instreammust be biota modified in moderately condition better or through maintenance of habitat, flows, water quality and limitation of barriers migration fish. The integritythe of macroinvertebrate the within community must system be maintained. The maintenance low flowsflows and drought must that so be attained the environmental flows requirements metare support a healthy condition for the ecosystem and users.
10
component -
Sub Fish Aquatic Invertebrates flows Low
Component Biota Quantity
C ategory cological C E
MA8 Node
R5 Unit Resource Resource
River) tributary) Renoster Renoster confluence Olifantsvlei Olifantsvlei River/Dam (includes the the (includes with thewith Vaal (Downstream confluence to (C70J, C70K) Heuningspruit
II Class
IUA Renoster
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th 99 99 (95
percentile)
0.0373 0.0579
th
percentile) percentile)
90 60
th percentile) 8.5 (95 . th
th
(95 allowed
Numerical limit limit Numerical n from background from n 0.1725 0.2076
percentile) and
th counts/100 millilitres milligrams/litre (50 milligrams/litre percentile) percentile) percentile)
milligrams/litre Sep Aug th th th 6 6.5 (5 ≤
(95 ≤1.25 milligrams/litre (50 milligrams/litre ≤1.25 ≤milligrams/litre 0.058 (50 1.0 ≤ milliSiemens/metre ≤ 55 percentile) ≤milligrams/litre 0.072 ≤ 130 variatio A 10% concentration is Instream habitat and Riparian Integrity category ≥ C (≥ 62) (95
.
measure
Rapid Habitat Indicator/ Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Ammonia Nitrogen as Escherichia coli range pH Turbidity The Assessment Method must be implemented
dity .
present must
Salinity
salinity
Objective nstream turbi nstream Resource Quality Quality Resource Instream concentration ofmust nutrients be improved to sustain aquatic ecosystem health the and ensure prescribed ecological category is met. Instream be maintained. levels should not be toallowed deteriorate. The concentrations of toxins should a be at not levelto that is toxic aquatic a organisms and threat human to health. The presence of pathogens should pose to human risk low a health. mustpH maintained be state.at present A baseline assessment to determine the i state is required. Instream and Riparian habitat inmusta be moderately modified condition better or
11
component -
Sub Nutrients Salts Toxics Pathogens variables System Instream Habitat
Component Quality Habitat
ategory cological C E
Node
Unit Resource Resource
River/Dam
Class
IUA
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≥ C (≥ 62) (≥ C ≥ Numerical limit limit Numerical
invertebrate ecologicalcategory:≥ C (≥ -
n ecological category of mustC be met. The
Fish ecologicalcategory: ≥ C (≥ 62) Macro 62) Instream Ecostatus category Hydrological category ≥ C 62) (≥ specified. as requirements flow monthly With 62) (≥ C ≥ category: Quality Water A must >Average value5.0 of ScorePer Taxon be achieved.
of the brate measure and future changes in the birdcomparedfuturethe communities changes the in to and
. Conduct aquatic esponse
the Indicator/ nvertebrate community Fish R Fish Assessment Index utilized. be must (FRAI) integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. Ashouldconducted baseline determine assessment thebe to bird aquatic community baseline
water water
Objective Resource Quality Quality Resource Instreammust be biota modified in moderately conditionThe better. or requirements fishof ecological of species importance and with particular and water flow qualitymust be needs provided for. The integritythe of invertebrate community must the within system be improved, by improving the quality a nutrient from perspective The habitat requirements aquatic of bird populationsmust be provided for.
12 component -
Sub Fish Aquatic Invertebrates Aquatic birdlife
Component Biota
C ategory cological C E
MA 8 Node
R5 Unit Resource Resource
River) tributary) Renoster Renoster confluence Olifantsvlei Olifantsvlei River/Dam (includes the the (includes with thewith Vaal (Downstream confluence to (C70J, C70K) Heuningspruit
II Class
IUA Renoster
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
/
percentile) cubic cubic
second Drought Flows 0.0261 0.0077 0.0000 0.0373 0.0703 0.0523 0.0000 0.0373 0.0386 0.0075 0.0411 0.0000 metres th
percentile)
th (50
- -
ile 60 70 70 80 70 90 60 40 60 60 60 30 t Per cen
(95
/ Numerical limit Numerical Low Flows Low cubic cubic Maintenance second 0.3200 0.6655 0.8307 1.1537 1.2475 1.1455 0.6917 0.3566 0.1991 0.1340 0.1568 0.2600 metres
percentile) percentile) percentile) percentile)
milligrams/litre th th th th Jul 6 Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month ≤ (95 ≤ 0. 50 milligrams/litre 50 ≤ 0. milligrams/litre ≤ 0.058 (50 ≤milligrams/litre 0.25 milliSiemens/metre ≤ 65 ≤ counts/100130 millilitres Instream habitat and Riparian Integrity category ≥ C (≥ 62) Ancategorymust ecological C/D be of met. The Average Score Per Taxon achieved.must 4.8 value of be > (50 (95
)
VALS (
measure of the brate
Assessment
Conduct aquatic
the Indicator/ nvertebrate community
Total Ecological WaterTotal Ecological Requirement MB3) (node = million33.464 cubic metres/annum (25.41% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalisedflow distribution) Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Escherichia coli Habitat Rapid The Assessment Method must be implemented integrity The i should be determined using Macroinverte Response Index.
nit of Analysis U
is met.
low flows flows low must be the water
ntegrated be improved be improved
. prescribed
. Objective must to support the aquatic support the to Resource Quality Quality Resource ined to support healthya s in the I the in s nstream salinity The maintenance and droughtmust flows be atta conditionthe for ecosystem and users Instream concentration of nutrients to sustain aquatic ecosystem and health ensure the ecological category I maintainedthe present at state ecosystem and quality requirements the of users water The pathogens presence of toshould risk a low pose human health. Instream and Riparian habitat inmusta be moderately modified condition better. or The integritythe of macroinvertebrate system the within community improved,must be by improving quality the water nutrientfrom perspective. a
13
component -
Sub Low flows Low Nutrients Salts Pathogens Instream Habitat Aquatic Invertebrates
in priority Resource Unit
Component Quantity Quality Habitat Biota
C Category Ecological for RIVERS AND DAMS AND RIVERS for
MB 3 Node
V2 Unit Resource Resource
spruit to the C60E, C60F) (Major (Major C60C, C60D, weir at weir Kroonval esource Quality Objectives (from the tributaries tributaries Pauciflora confluence the include Kroonstad) Kroonstad) River/Dam Liebenberg stroom and Blomspruit) Elandspruit, Vals (C60B, R : 4
III Class Table
MB MB IUA Vals
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
/
cubic cubic second 0.0261 0.0077 0.0000 0.0373 0.0703 0.0523 0.0000 0.0373 0.0386 0.0075 0.0411 0.0000 metres Drought Flows
- -
ile 60 70 70 80 70 60 60 40 50 70 60 30 t Per cen
/ Numerical limit Numerical Low Flows Low cubic cubic Maintenance second metres 0.3200 0.6655 0.8307 1.1537 1.2475 1.1455 0.6917 0.3566 0.1991 0.1340 0.1568 0.2600
invertebrate ecological -
percentile) percentile)
th th Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month
The Specific should PollutionIndex be > 9.2 category).(C Instream habitat and Riparian Integrity category ≥ C (≥ 62) Fish ecologicalcategory: ≥ C (≥ 62) Macro category:≥ C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C (≥ 62) With monthly flow requirements as specified. 62) (≥ C ≥ category: Quality Water
(50 ≤milligrams/litre 0.50 ≤milligrams/litre 0.015 (50
measure
ate and ate
esponse n Annual Runoff) Indicator/
biomonitoring annually using the South African 5 System Scoring methodology. Conduct diatom a assessment annually. A baseline to assessment determine integrity the and healthfish the of community should be conducted determine to the current st potential impacts to the population. R Fish Assessment Index (FRAI) must be utilized. WaterTotal Ecological Requirement MB3) (node = million33.464 cubic metres/annum (25.41% Virgin the of Mea Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalisedflow distribution) Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus
nutrients in in nutrients portance and portance be improved improvement
Objective must
Resource Quality Quality Resource oncentration of
Water quality is nutrientfrom required a perspective. Instream biota must be in moderately modified conditionThe better. or requirements fishof species of ecological im particularwith and flow qualitywater must needs be the including for provided migration limitation of barriers. The downstream flow low maintenance requirements 3 node MB of support a met to must be healthy conditionfor the ecosystem. the dam to sustain ecosystem health and thequality water requirements users. water of
C
14
component -
Sub Diatoms Fish flows Low Nutrients
Component Biota Quantity Quality
C Category Ecological
MB 3 Node
3 V2 V Unit Resource Resource
weir) weir) spruit to the C60E, C60F) (Major (Major C60C, C60D, Kroonval (from the tributaries tributaries Pauciflora confluence River/Dam Serfontein Liebenberg stroom and Blomspruit) Elandspruit, Vals (C60B, Dam (C60D)
III III Class
MB MB MB IUA Vals Vals
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percentile) percentile)
th th
percentile) percentile)
th th (50 (50
(95
(95
) Numerical limit Numerical aquaticspecies bird as - percentile) percentile) percentile) percentile) percentile percentile)
milligrams/litre milligrams/litre th th th th th th 6 6 (50 ≤ counts/100130 millilitres Use Reserveand Desktop Model updated Present Ecological dataState to requirements. flow determine low milligrams/litre ≤ 0.50 ≤milligrams/litre 0.25 ≤ ≤milligrams/litre 0.058 milliSiemens/metre ≤ 65 (50 (95 (95 ≤ ≤milligrams/litre 0.25 ≤milligrams/litre 0.025 milliSiemens/metre ≤ 65 (50 (95
measure
a - ally important fish species as specified.allyspecies important fish as
Indicator/
Nitrate& Nitrite as Nitrogen Chlorophyll conductivity Electrical Escherichia coli Maintenance releases flow RU specifiedas low 3 in of for node MB V2. Habitatspecified requirements and health of ecologically and recreation Habitatspecified requirements and health of ecologically and recreationally semi important aquatic and specified. Ecological Water Requirement for flows low maintenance Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus conductivity Electrical
s.
rtant fish
must be be
o support the to support t
Objective must
in the dam must be thein dam
Resource Quality Quality Resource downstream
atic health ecosystem nstream salinity I
Dam should be maintained in a mesotrophic state. Salinity maintained ecosystem and water health quality requirements the of downstream user water The pathogens presence of toshould risk a low pose human health. The flow low maintenance requirements 3 node MB of in RU V2 must be met to supportcondition a healthy for the and ecosystem users. theThe importance Dam of must refuge be fish as a includes This protected. ecologically and impo recreationally species. theThe importance Dam of for abstraction and releases flow ecological must be protected. must maintained to Flows be supportthe systems wetland present. Instream concentration of nutrients to sustain maintained aqu and ensure prescribed the ecological category is met. Concentrations should not tobe allowed deteriorate. maintained aquatic ecosystem.
15
component -
Sub Salts Pathogens Fish flows Low Nutrients Salts
Component Quality Biota Quantity Quality
C Category Ecological
Node
3 V4 V Unit Resource Resource
tributary) t (C60H) (C60H) t River/Dam Serfontein (Otterspruit Middelsprui Dam (C60D)
III Class
MB MB IUA Vals
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
Flows
/ Percentile High
cubic cubic C (≥ 62) (≥ C 0.003 0.005 0.006 0.008 0.008 0.008 0.000 0.003 0.002 0.002 0.002 0.000 second Drought Flows metres
- -
ile 70 80 80 90 80 80 80 70 80 90 90 70 t
Per cen second Maintenance cubic metres/ cubic
/ / Numerical limit Numerical Low Flows Low cubic cubic Maintenance 0.153 0.276 0.333 0.447 0.484 0.444 0.285 0.166 0.112 0.087 0.095 0.133 second metres
invertebrate ecological -
Month Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month
Instream habitat and Riparian Integrity category ≥ C (≥ 62) Fish ecologicalcategory: ≥ Macro category:≥ C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C (≥ 62) With monthly flow requirements as specified. 62) (≥ C ≥ category: Quality Water Maintain category by currentthe C ensuringPer Taxon Average Score the is >5.0.
measure
of the brate
South African
Conduct aquatic esponse
the Ecological Water
Indicator/ baseline assessment to baseline to assessment nvertebrate community The Rapid Habitat Habitat Rapid The Assessment Method must be implemented A determine integrity the and healthfish the of community should be conducted determine to the current and state potential impacts to the population. R Fish Assessment Index (FRAI) must be utilized. integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the 5 System Scoring methodology. low Total Maintenance and droughtflow flow Ecological Water Requirement = 14) (EWR 8.003 million cubic metres/annum of (5.49% the Annual VirginMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalisedflow distribution) high Total Maintenance flow Requirement = 14) (EWR
Objective
Resource Quality Quality Resource Instream and Riparian habitat inmusta be moderately modified condition better. or Instream biota must be in moderately modified conditionThe better. or requirements fishof species of ecological and importance particularwith and flow qualitywater must needs be the including for provided migration limitation of barriers. The integritythe of macroinvertebrate system the within community must maintained. be flows low maintenance The and droughtmust flows be attained so that the environmental flows requirements met to are supportcondition a healthy for the and ecosystem users. maintenanceThe flows high must that the so be attained environmental flows
16
component -
Sub Instream Habitat Fish Aquatic Invertebrates flows Low Flows High
Component Habitat Biota Quantity
C/D Category Ecological
14 EWR Node
V5 Unit Resource Resource
Vals (From C60J) C60J) (C60G, Skikspruit Skikspruit spruit and Kroonvaal (Nuwejaar weir toweir the Vaal River tributaries) River/Dam confluence)
III Class
MB MB IUA Vals
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672 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
tile) tile)
99 50 99 90 60 60 99 99 99 99 99 99
percen percentile)
th
percentile) 1.7 th th
th (50
percentile) . (50
(50
8.6
th (50
percentile)
(95 2.7 1.6 th
0.000 1.653 0.000 0.697 0.000 0.000 0.000 0.000 0.000 0.000 allowed
n from background from n Phytoplankton ≤ 0.025 Periphyton ≤
Numerical limit Numerical a a - - square metre
percentile) and percentile) and
th percentile) percentile) percentile). 5 milligrams/litre milligrams/litre 5 milliSiemens/metre milliSiemens/metre
Jul Jan Jun Oct Apr Feb Sep Dec Aug milligrams/litre Nov Mar May th th th 6 (95 ≤ 1.50 milligrams/litre ≤ 1.50 ≤milligrams/litre 0.125 1.3 ≤ ≤ Chlorophyll milligrams/ percentile) Chlorophyll (50 milligrams/litre ≤ 85 ≤ counts/100130 millilitres 7.0 (5 variatio A 10% concentration is (95 (95
the
ations.
measure
a -
Indicator/
16.969 million cubic metres/annum (11.64% Virgin the of AnnualMean Runoff) Maintenance high flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen Chlorophyll concentrations should be monitored a response as indicator against resource quality objective nutrient concentr conductivity Electrical Escherichia coli range pH Turbidity
sustain present state s should not
dity is
ate. salinity should not Objective must
Resource Quality Quality Resource oncentration nstream turbi i requirements met to are supportcondition a healthy for the ecosystem. Instream concentration of nutrients aquatic health. ecosystem C tobe allowed deteriorate. Instream deteriorate. The pathogens presence of toshould risk a low pose human health. mustpH maintained be at present st A baseline assessment to determine the required.
17
component -
Sub Nutrients Salts Pathogens variables System
Component Quality Quality
C/D Category Ecological
14 EWR Node
V5 Unit Resource Resource
Vals (From C60J) C60J) (C60G, Skikspruit Skikspruit spruit and tributaries Kroonvaal (Nuwejaar weir toweir the Vaal River River/Dam confluence)
III Class
MB MB IUA Vals
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Numerical limit Numerical
invertebrate ecological - South African Scoring System South5 African Scoring
Instream habitat and Riparian Integrity category ≥ C/D 58) (≥ Fish ecologicalcategory: ≥ 58) C/D (≥ Macro category:≥ C/D 58) (≥ (≥ C/D ≥ category Ecostatus Instream 58) Hydrological category ≥ C/D 58) (≥ With monthly flow requirements as specified. 58) (≥ C/D category:≥ Quality Water The score must >110be and the Average >5.2.Score Per Taxon
site 14 site 14
. and and measure
of the brate Ecological Ecological for for
Conduct aquatic esponse
the Indicator/ nvertebrate community
The Rapid Habitat Habitat Rapid The Assessment Method must be implemented R Fish Assessment Index (FRAI) must be utilized. ecological The specifications Thresholds Potential of Concern Water Requirement must be to.adhered integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. ecological The specifications Thresholds Potential of Concern Water Requirement to.must be adhered better
Ecological Ecological
The requirementsThe
Objective Resource Quality Quality Resource maintained. tate must be improved to a must totate be improved a Instream and Riparian habitat inmusta be modified largely than condition better. or Instream biota must be in a modified largely than better condition. of species ecological fish of importance and with particular and water flow qualitymust be needs the including for provided migration limitation of barriers. importance The of fish for in the a refuge as RU mustthe Middle River Vaal be The Present category.C S
18 component -
Sub Instream Habitat Fish Aquatic Invertebrates
Component Habitat Biota
Category Ecological
Node
Unit Resource Resource
River/Dam
Class
IUA
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674 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
- - ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
year year
)
th /
Flows Drought cubic cubic percentile) percentile) 0.0037 0.0039 0.0112 0.0112 0.0165 0.0149 0.0000 0.0037 0.0039 0.0000 0.0000 0.0000 metres
second th percentile percentile) 95 th
- - ( percentile) percentile) th
ile
70 80 40 40 40 70 60 50 70 70 80 70 t th Per cen (50
(95
/s date of the Government date of litre
) Low Flows Low cubic cubic Maintenance econd limit of 400 milligrams/ litre litre milligrams/ 400 of limit Numerical limit Numerical 0.0202 0.0409 0.0571 0.1038 0.1682 0.2012 0.1246 0.0504 0.0243 0.0179 0.0138 0.0104
metres year after publication date of after publicationyear of date percentile) to be met by themet by topercentile) be
th th
percentile percentile) percentile) themet by to 10 be year afteryear the publication of date milligrams/litre
th th th Jul Jan Jun Oct Apr Feb Sep Dec th Aug Nov Mar May 6 3.0 milligrams/litre 3.0 Month (50 ≤ ≤milligrams/litre 0.125 milligrams/ ≤ 2.5 milliSiemens/metre ≤ 85 milliSiemens/A limit numerical 110 of metre (95 10 Government Notice. Resource Quality achieved be to limit numerical Objective theby 20 the Government Notice. (95 milligrams/litre ≤ 250 A numerical (95 after publication Objective Quality Resource Notice. (50 ≤
SCHOONSPRUIT
(
of 85 of
metre. A A metre. measure
limit limit
state meetto
Indicator/ managed in future to illiSiemens/
m WaterTotal Ecological Requirement MC5) (node = million4.691 cubic metres/annum (17.91% of the Annual VirginMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalisedflow distribution) mine and The water treatmentwastewater works discharges in relation the to required to flows have instream will be ensure the maintenance river. the in low Dissolved Inorganic Nitrogen nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Theto salinity be needs improved significantly from the present the required phased approach a over period year istwenty to be usedthe achieve to limit of milliSiemens/metre. 85 Sulphate
the
attained to to attained Objective er er users. Resource Quality Quality Resource nstream salinity must be The maintenance low flowsflows and drought must be support a healthy condition for the ecosystem and users. Instream concentration of nutrients must be improved to sustain aquatic health ecosystem and ensure prescribed the ecological category is met. Concentrations should not tobe allowed deteriorate. improved to acceptable supportlevels a healthy to aquatic and ecosystem qualitywater requirements of wat I
-
19
Sub component Low flows Low Nutrients Salts
ality Component Quantity Qu
D category Ecological
MC 5 Node
SK1 Unit Resource Resource -
spruit spruit (C24A) River/Dam Koekemoer
Resource Quality Objectives for RIVERS AND DAMS in priority Resource Units the in Integrated Unit of Analysis
: III 5 Class Table
MC IUA spruit Schoon Schoon
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STAATSKOERANT, 22 APRIL 2016 No. 39943 675
th
score percentile) percentile)
th th percentile) percentile) th th percentile) percentile) percentile) percentile) percentile) th
th th
Numerical limit Numerical
invertebrate ecologicalcategory:≥ - percentile)
th toxicity testshould conducted at be
(95
numerical 20 the achievedlimitto by be afteryear the publication date of Government Notice. ≤100milligrams/litre (95 ≤milligrams/litre 0.050 (95 (95 milligrams/litre ≤ 0.1 ≤milligrams/litre 0.250 (95 ≤milligrams/litre 0.25 (95 ≤milligrams/litre 0.03 (95 (95 ≤ 0.1milligrams/litre ≤ counts/100130 millilitres Instream habitat and Riparian Integrity category ≥ D (≥ 42) Fish ecologicalcategory: 42) ≥ ≥ (≥ D Macro D (≥ 42) 42) (≥ D category≥ Ecostatus Instream Hydrological category≥ (≥ D 42) With monthly flow requirements as specified. 42) (≥ D category:≥ Quality Water Index Pollution Specific The should 5.0. be >
.
measure
ponse ponse
Rapid Habitat
Indicator/
Magnesium Cyanide (free) Aluminium Manganese Iron Uranium Ammonia Nitrogen as effluent level whole A screening four toxicity trophicshouldtheshow than levels results greater and 1 (limited toxic) further to definitive acutely not required. tests are Escherichia coli The Assessment Method must be implemented A baseline assessment to determine integrity the and healthfish the of community should be conducted determine to the current state and potential impacts to the population. Res Fish Assessment Index (FRAI) must be utilized. SpecificPollution Index. Conduct diatom a assessment annually.
at a
and with and with
Objective Resource Quality Quality Resource The concentrations of toxins should be not levelto that is toxic aquatic a organisms and threat human to health. The presence of pathogens should pose a risklow health.to human Instream and Riparian habitat inmusta be condition modified largely better.or Instream biota must be in modified largely a conditionThe better. or requirements fishof ecological of species importance particular and water flow qualitymust be needs provided for. Water quality improvement is nutrientfrom required a perspective.
-
20
Sub
component Toxics Pathogens Instream Habitat Fish Diatoms
Component Quality Habitat Biota
D category Ecological
MC 5 Node
Unit SK1 Resource Resource
-
River/Dam Koekemoer spruit (C24A) spruit
III Class
MC IUA spruit Schoon Schoon
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th
percentile)
th percentile) 8.5 (95
th (50
(95
Numerical limit Numerical
percentile) and
th percentile) percentile) percentile)
milligrams/litre th th th 6 6.0 (5 (95 ≤ Use Reserveand Desktop Model updateddataEcological Present to State determine requirements. flow low milligrams/litre ≤ 2.5 ≤milligrams/litre 0.020 ≤milligrams/litre 0.010 milliSiemens/metre ≤ 55 percentile) (50
(50
measure
a -
impacting on the
hosphate as nspruit eye for water for water nspruit eye Indicator/ the of depletion is There groundwater resources iswhich quality and water flow of the Schoonspruit Eye due to water irrigation use.water The water qualityis the of eye currentlyis good and it this to maintain important quality irrigation as and domestic users are water dependent on the Schoo supply. Ecological Water Requirement for flows low maintenance and drought flows Nitrate& Nitrite as Nitrogen Orthop Phosphorus Chlorophyll conductivity Electrical range pH
s s low
spruit
low low logical logical current be
The The . and users
oncentration be maintainedbe at
must Objective of the Schoon and drought flows must be maintained. must Resource Quality Quality Resource The maintenance flows must to be attained support a healthy condition for the ecosystem Instream concentration of nutrients to sustain maintained aquatic health ecosystem theof Eye and protect the qualitygood water present. C should to be allowed not deteriorate. qualitywater eco status Eye Salinity levelsthe at Schoonspruit are eye and the present state. Salinity levels should not deteriorate. mustpH maintained be at present state.
-
21
Sub component Low flows Low Nutrients Salts System variables
Component Quantity Quality
C category Ecological
MC 1 Node
SK2 Unit Resource Resource
River/Dam Eye (C24C) Eye Schoonspruit Schoonspruit
III Class
MC IUA spruit Schoon Schoon
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- - ≥ ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
Flows Drought
cubic cubic second 0.0075 0.0039 0.0037 0.0149 0.0124 0.0112 0.0270 0.0224 0.0201 0.0153 0.0119 0.0096 metres/
- -
ile 60 70 70 70 60 60 70 80 90 99 99 70 t Per cen
Low Flows Low cubic cubic Numerical limit Numerical econd Maintenance 0.0239 0.0278 0.0310 0.0743 0.1484 0.1605 0.1073 0.0489 0.0313 0.0246 0.0202 0.0170 metre/s
invertebrate ecological category:
-
percentile)
th Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month
Instream habitat and Riparian Integrity category ≥ B (≥ 82) Fish ecologicalcategory:≥ B 82) (≥ Macro B (≥ 82) InstreamEcostatus category≥B (≥ 82) Hydrological category ≥ B (≥ 82) With monthly flow requirements as specified. Water Quality category: (>92) A milliSiemens/metre ≤ 65
(95
.
measure
value of of value
Indicator/
The Rapid Habitat Habitat Rapid The Assessment Method must be implemented WaterTotal Ecological Requirement MC2) (node = million4.147 cubic metres/annum (21.27% Virgin the of AnnualMean Runoff) Maintenance flows (percentile naturalised flow distribution) Drought flows (percentage value of naturalisedflow distribution) conductivity Electrical
water water
condition or
to support
Objective Salinity levels levels Salinity
. Resource Quality Quality Resource
Instream and Riparian habitat inmusta be largely natural better.The habitat is unique to the catchment must and area be maintained theat prescribed ecological condition. Instream biota must be in a largelycondition natural better.or The requirements of ecological of species importance and with particular and water flow qualitymust be needs provided for. The maintenance low flowsflows and drought must to be attained support a healthy condition for the ecosystem and users. must salinity The instream maintainedbe the at present state the aquatic and ecosystem the quality water requirements theof users should deteriorate. not
- 22
Sub component Instream Habitat flows Low Salts
ality Component Habitat Quantity Qu
C category Ecological
MC 2 Node
Unit SK3 Resource Resource
(C24F) River/Dam Taaibosspruit Taaibosspruit
III Class
MC IUA spruit Schoon Schoon
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678 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
th
(50
percentile) percentile)
th
percentile)
th percentile)
th
(50
(95
Numerical limit Numerical
invertebrate ecologicalcategory:≥ - monthly flow requirements as as requirements flow monthly percentile) percentile)
milligrams/litre th th 6 (95 (50
≤
Use Reserveand Desktop Model updateddataEcological Present to State determine requirements. flow low milligrams/litre ≤ 3.0 ≤milligrams/litre 0.125 percentile) milligrams/litre ≤ 2.5 (95 milliSiemens/metre ≤ 75 ≤ counts/100130 millilitres Instream habitat and Riparian Integrity category ≥ C/D 58) (≥ Fish ecologicalcategory:≥ 58) (≥C/D Macro 58) (≥ C/D 58) (≥ C/D category≥ Ecostatus Instream Hydrological category≥ (≥ 58) C/D With specified. 58) (≥ C/D category:≥ Quality Water
. cts to the measure
.
Indicator/
Ecological Water Requirement for flows low maintenance Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Escherichia coli Habitat Rapid The Assessment Method must be implemented A baseline assessment to determine integrity the and healthfish the of community should be conducted determine to the current state and potential impa population Fish Response Assessment Index (FRAI) must be utilized.
must water water
to support to
modified
drought flows
Objective
. Resource Quality Quality Resource The maintenance low flows and must to be attained support a healthy condition for the ecosystem and users. Instream concentration of nutrients must be to sustain maintained aquatic health ecosystem and ensure prescribed the ecological category is met. salinity The instream maintainedbe the at current state the aquatic and ecosystem the quality water requirements theof users The presence of pathogens should pose a risklow health.to human Instream and Riparian better habitat inmusta be than largely condition. Instream biota must be in largelya better than The condition. modified requirements fishof ecological of species importance and with particular and water flow qualitymust be needs provided for.
-
23
Sub
component Low flows Low Nutrients Salts Pathogens Instream Habitat Fish
Component Quantity Quality Habitat Biota
C/D C/D category Ecological
MC 3 MC 3 Node
Unit SK4 SK4 Resource Resource
- -
loop loop loop eye toeye the toeye the Kaalspruit Kaalspruit tributaries) tributaries) River/Dam confluence) confluence) (From below (From below (From below Strydfontein Strydfontein (C24D, C24E) (C24D, C24E) (C24D, C24E) Schoonspruit Schoonspruit Schoonspruit (Rietspruit and (Rietspruit and
III Class
MC IUA spruit Schoon Schoon
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th
percentile) (95
th
percentile)
8.5 th
(95
Numerical limit Numerical
percentile) and percentile) and
th percentile) percentile) percentile) percentile)
5 milligrams/litre milligrams/litre (50 5 milligrams/litre th th th th . 6 2
≤ (95 ≤ (95 Maintain category by currentthe C ensuringPer Taxon Average Score the is >5.0. Use Reserveand Desktop Model updateddataEcological Present to State determine requirements. flow low milligrams/litre 1.0 ≤ (50 0.125 milligrams/litre (50 milliSiemens/metre ≤ 70 ≤ counts/100130 millilitres 6.0 (5 percentile) Instream habitat and Riparian Integrity category ≥ C/D 58) (≥
.
measure
of the brate
Conduct aquatic
the Indicator/ nvertebrate community The integrity integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. Ecological Water Requirement for flows low maintenance Dissolved Inorganic Nitrogen nitrogen as Orthophosphate as Phosphorus ≤ Nitrate& Nitrite as Nitrogen conductivity Electrical Escherichia coli range pH Habitat Rapid The Assessment Method must be implemented
must water water
users. to support modified
Objective
. Resource Quality Quality Resource The integritythe of macroinvertebrate the within community must system be maintained. The maintenance low flowsflows and drought must to be attained support a healthy condition for the ecosystem and Instream concentration of nutrients must be improved to sustain aquatic health ecosystem and ensure prescribed the ecological category is met. Concentrations should not tobe allowed deteriorate. salinity The instream maintainedbe the at present state the aquatic and ecosystem the quality water requirements theof users The presence of pathogens should pose a risklow health.to human mustpH maintained be at present state. Instream and Riparian better habitat inmusta be than largely condition.
-
24
Sub component Aquatic Invertebrates flows Low Nutrients Salts Pathogens System variables Instream Habitat
Component Quantity Quality Habitat
C/D C/D category Ecological
MC 3 MC 3 Node
Unit SK5 SK5 Resource Resource
-
From From (24F) (24F) Dam) spruit) (includes (includes Kaalspruit Kaalspruit River/Dam Buisfontein Johan Neser confluence to confluence to Schoonspruit Schoonspruit Schoonspruit
III Class
MC IUA spruit Schoon Schoon
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percentile)
percentile) th
ecological th (50
(95
>5.0. Numerical limit Numerical
invertebrate ecologicalcategory:≥ - percentile) monthly flow requirements as as requirements flow monthly percentile) percentile) percentile) percentile)
milligrams/litre th th th th th 6 (50 ≤
(95
Fish ecologicalcategory:≥ 58) (≥C/D Macro 58) (≥ C/D 58) (≥ C/D category≥ Ecostatus Instream Hydrological category≥ (≥ 58) C/D With specified. 58) (≥ C/D category:≥ Quality Water Maintain the current C categoryAverage Score the ensuring by isPer Taxon milligrams/litre ≤ 0.5 ≤milligrams/litre 0.025 milligrams/litre ≤ 2.5 ≤milligrams/litre 0.025 milliSiemens/metre ≤ 70 ≤ counts/100130 millilitres
(50 (50 (95
and health of specified of and health ecologically and
ts to the measure
of the brate
a -
. equirements
Conduct aquatic
the Indicator/ nvertebrate community
A baseline assessment to determine integrity the and healthfish the of community should be conducted determine to the current state and potential impac population Fish Response Assessment Index (FRAI) must be utilized. integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen Chlorophyll conductivity Electrical Escherichia coli Habitat r recreationallyspecified.species important fish as
the
and . of
be s s should not
to support health health must a refuge fora refuge Objective
water users water aquatic aquatic biota must - Resource Quality Quality Resource oncentration oncentration Instream biota must be in largelya better than The condition. modified requirements fishof ecological of species importance and with particular and water flow qualitymust be needs provided for. The integritythe of macroinvertebrate the within community must system be maintained. nutrients to sustain maintained ecosystem and the health qualitywater requirements of users. water C tobe allowed deteriorate. Nutrient concentrations a in maintained be must mesotrophic state. Salinity must be maintained ecosystem qualitywater requirements of the The presence of pathogens should pose a risklow health.to human theThe importance of Dam as upstream and aquatic semi be protected. This and ecologically includes C
-
5 2
Sub
component Fish Aquatic Invertebrates Nutrients Salts Pathogens Fish
Component Biota Quality Biota
category Ecological
Node
SK6 Unit Resource Resource
-
Dam) spruit) (includes (includes River/Dam Buisfontein (Klerksdorp (Klerksdorp Johan Neser Johan Neser Neser Johan Dam) (C24G)
Class
IUA
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STAATSKOERANT, 22 APRIL 2016 No. 39943 681
th th th th th
(95 (95 (95
(95
percentile) percentile) percentile)
th h percentile)
th
(50
(95
Numerical limit Numerical
percentile) percentile) percentile) percentile) percentile)
milligrams/litre th th th th 6 ≤ Use Reserveand Desktop Model updateddataEcological Present to State determine requirements flow low for Schoonspruit. 4 on the node MC milligrams/litre 3.0 ≤ (50 (50 milligrams/litre 0.125 ≤ percentile) milligrams/litre ≤ 2.5 (95 milliSiemens/metre ≤ milligrams/litre ≤ 200 percentile) ≤milligrams/litre 0.050 percentile) milligrams/litre ≤0.1 ≤milligrams/litre 0.250 ≤milligrams/litre 0.03 percentile) ≤milligrams/litre 0.072 percentile) ≤milligrams/litre 0.25 (95 (95 (95
measure and drought
Indicator/ Ecological Water Requirement for maintenance flows. low Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Sulphate Cyanide (free) Aluminium Manganese Uranium Ammonia Nitrogen as Iron screeningAeffluent level whole toxicity testshould conducted at be four toxicity trophicshouldtheshow than levels results greater and 1 (limited toxic) further to definitive acutely not required. tests are
the
must
. to support the
Objective ensure prescribed the Resource Quality Quality Resource
water users water
recreationally important species. fish theThe importance of Dam for recreation, abstraction ecological and be must releases flow protected. The maintenance low flowsflows and drought must to be attained support a healthy condition for the ecosystem and users. Instream concentration of nutrients must be improved to sustain aquatic health ecosystem and ecological category is met. Concentrations should not tobe allowed deteriorate. salinity The instream be improved aquatic and ecosystem qualitywater requirements of The concentrations of toxins should a be at not levelto that is toxic aquatic a organisms and threat human to health.
-
26
Sub component Low flows Low Nutrients Salts Toxics
Component Quantity Quality
C/D category Ecological
MC 4 Node
SK7 Unit Resource Resource
(24H) (24H) River) tributary (includes (includes Jagspruit of Vaal the River/Dam (From Johan Neser Dam to Schoonspruit Schoonspruit the confluence
III Class
MC IUA spruit Schoon Schoon
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category:≥
ecological
Riparian habitat Integrity Integrity habitat Riparian Numerical limit Numerical
invertebrate ecological - percentile)
th ish ecologicalcategory:≥ 58) (≥C/D
≤ counts/100130 millilitres Instream and category ≥ C/D 58) (≥ F Macro 58) (≥ C/D 58) (≥ C/D category≥ Ecostatus Instream Hydrological category≥ (≥ 58) C/D With monthly flow requirements as specified 4. MC Node at 58) (≥ C/D category:≥ Quality Water The current ecological category D/E improved D must to be a Average category.to an reach Aim 4.2 value ofScorePer > Taxon
(95
. . must be
current measure
of the brate . Conduct aquatic
the ponse Assessment Indicator/ nvertebrate community Res
Escherichia coli Habitat Rapid The Assessment Method must be implemented A baseline assessment to determine the integrity the of and health community fish undertaken Fish Response Assessment Index (FRAI) must be utilized integrity The i should be determined using Macroinverte Index. biomonitoring annually using the South African 5 System Scoring methodology.
Objective Resource Quality Quality Resource better than largely nstream and Riparian The presence of pathogens should pose a risklow health.to human I better habitat inmusta be than largely modified condition. Instream biota must be in a The condition. modified requirements fishof ecological of species importance and with particular and water flow qualitymust be needs provided for. The integritythe of macroinvertebrate the within community system improvedmust be through the implementation theof qualitywater objective specified above.
- 27
Sub
component Pathogens Instream Habitat Fish Aquatic Invertebrates
Component Habitat Biota
C/D category Ecological
MC 4 Node
SK7 Unit Resource Resource
(24H) (24H) River) confluence tributary (includes (includes Jagspruit of Vaal the River/Dam (From Johan Neser Dam to Schoonspruit Schoonspruit the
III Class
MC IUA spruit Schoon Schoon
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- -
ile t Per cen 99 99 99 99 99 99 99 99 99 99 99 99
/ / percentile)
percentile)
cubic cubic
second th metres Drought Flows 0.0373 0.0193 0.0112 0.0411 0.0496 0.0299 0.0231 0.0187 0.0000 0.0299 0.0302 0.0444 th
percentile)
th (50
- -
ile t Per cen 60 80 80 80 70 70 70 50 50 70 80 60 (95
/ Numerical limit Numerical Low Flows Low cubic cubic Maintenance second metres 0.2225 0.3673 0.4066 0.5615 0.7068 0.6213 0.4201 0.2640 0.1659 0.1094 0.1057 0.1644
)
percentile) percentile) percentile) percentile)
milligrams/litre th th th th Jul 6 Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month (50 ≤ (95 (95 ≤milligrams/litre 0.50 ≤milligrams/litre 0.25 milligrams/litre ≤ 0.058 milliSiemens/metre ≤ 75 ≤milligrams/litre 0.072 (95 ≤ counts/100130 millilitres (50
UPPER SAND UPPER
(
.349 million
Indicator/measure rcentage value of
Total Ecological WaterTotal Ecological Requirement (node =MD1.1) 17 cubic metres/annum (26.13% Virgin the of AnnualMean Runoff) Maintenance flows (pe naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus conductivity Electrical Ammonia Nitrogen as Escherichia coli
low flows flows low Quality Quality
Objective
Resource Resource The maintenance and droughtmust flows be attained to support healthya conditionthe for ecosystem and users. Instream concentration of nutrients must be to sustain maintained aquatic health ecosystem prescribedand to the ensure ecological category is met. Instream salinity must be maintained to support the aquatic health ecosystem and thequality water requirementsthe water of users. toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health. The pathogens presence of toshould risk a low pose human health.
-
28
Sub component Low flows Low Nutrients Salts Toxics Pathogens
ty Quali Quantity Component
C Category Ecological
1.1 MD Node
Unit US2 Resource Resource
Dam ) River/ Dam Upper Sand Sand Upper confluence to (C42D, C42E) (C42D, C42E) Allemanskraal (From Klipspruit Resource Quality Objectives for RIVERS AND DAMS in priority Resource Units the in Integrated Unit of Analysis
:
6
III Class able T
IUA MD1 MD1 Sand Upper Upper
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- - ile
99 99 99 99 99 99 99 99 99 99 99 99 t
Per cen
/
ntile)
percentile) cubic cubic
second metres Drought Flows the Average Average the th perce
0.0523 0.0270 0.0187 0.0709 0.0827 0.0523 0.0424 0.0336 0.0193 0.0448 0.0627 0.0887
percentile) th
ecological th (50
- - that
ile 60 70 80 80 70 70 70 40 50 70 80 60 (95 t
Per cen
/ / Numerical limit Numerical Low Flows Low cubic cubic Maintenance second metres
0.3558 0.6034 0.6743 0.9457 1.1913 1.0629 0.7284 0.4529 0.2662 0.1635 0.1591 0.2600 invertebrate ecological
-
milligrams/litre Jul 6 Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month
Fish ecologicalcategory: ≥ C (≥ 62) Macro category:≥ C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C (≥ 62) With monthly flow requirements as specified. 62) (≥ C ≥ category: Quality Water Maintain the current C category ensuring by is >5.0.ScorePer Taxon (50 milligrams/litre ≤ 0.5 ≤milligrams/litre 0.25 ≤
.
of the brate
Nitrite as
Conduct aquatic
the Response Indicator/measure nvertebrate community
A baseline assessment to determine integrity the and health fish the of community should be conducted determine to the current and state potential impacts to the population. Fish Assessment Index (FRAI) must be utilized integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. WaterTotal Ecological Requirement (node million =MD2.1) 29.516 cubic metres/annum (28.34% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Nitrate & Nitrogen
nd
nutrients nutrients the Quality Quality
Objective be maintained to maintained be Resource Resource oncentration of Instream biota must be in moderately modified conditionThe better. or requirements fishof species of ecological importance a particularwith and flow qualitywater must needs be provided for. The integritythe of macroinvertebrate system the within community must maintained. be flow low maintenance The requirements of downstream 2.1 node MD support a met to must be healthy conditionfor the ecosystem and users. must sustain health ecosystem qualityand water requirements users. water of C
-
29 Sub
component Fish Aquatic Invertebrates flows Low Nutrients
Biota Quality Quantity Component
C Category Ecological
1.1 MD Node
Unit US3 US2 Resource Resource
Dam ) River/ Dam Dam (C42E) Upper Sand Sand Upper confluence to (C42D, C42E) (C42D, C42E) Allemanskraal Allemanskraal (From Klipspruit
III Class
IUA MD1 MD1 Sand Upper Upper
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th th
percentile) percentile) th
th th
Numerical limit Numerical
percentile) and 8.5percentile) (95 and pecified ecologically and and ecologically pecified
th ≤milligrams/litre 0.025 (50 ≤milligrams/litre 0.025 (50 (95 milliSiemens/metre ≤ 30 percentile). 7.0 (5 percentile) ≤ counts/100130 millilitres (95 percentile)
a - conductivity
Indicator/measure Orthophosphate as Phosphorus Chlorophyll Electrical range pH Escherichia coli Habitat s requirements of and health recreationallyspeciesaquatic important fishspecies as bird specified. shouldAconducted baseline determine assessment thebe to aquatic dam. community the around bird
the ), s.
ined at
dam must must dam aquatic - Quality Quality
Sterna
Objective ecosystem health health ecosystem qualitywater
) are of conservation of are ) Resource Resource salinity in the the in salinity the Greater Flamingo Flamingo Greater quirements theof Phoenicopterus roseus Phoenicopterus minor), Dam should be maintained in a mesotrophic state. The be maintained in toorder support and re downstream user water mustpH mainta be present state. The pathogens presence of toshould risk a low pose human health. Thethe importance Dam of upstreamas for a refuge aquatic semi and biotamust be protected. ecologically includes This and recreationally important fish species and ecologically important aquatic bird species Thethe importance Dam of for recreation, abstraction and ecological releasesflow must be protected. supportsThe dam large numbers a rich diversity of of and resident locally migratory and fowl water associatedthese birds. Of the ( Flamingo Lesser ( ( Tern Caspian caspia importance. suitability The of thefor bird aquatic dam must be populations maintained through proper habitat management.
-
30
Sub
component Salts System variables Pathogens Fish Aquatic birds
Biota Quality Component
Category Ecological
Node
Unit US3 Resource Resource
River/ Dam Dam (C42E) Allemanskraal
III Class
IUA MD1 Sand Upper Upper
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- -
ile
t Per cen 99 99 99 99 99 99 99 99 99 99 99 99
/
th th cubic cubic Drought Flows Drought second
percentile) metres 0.0000 0.0000 0.0000 0.0037 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 percentile)
th th
percentile)
- -
th (50 ile
t Per cen 50 60 60 70 60 60 50 30 30 50 50 30
(95
/
Flows Numerical limit Numerical cubic cubic second 0.0459 0.1076 0.1307 0.2106 0.2534 0.2699 0.1956 0.1064 0.0444 0.0004 0.0056 0.0343
Maintenance Low Maintenance metres percentile) and 8.5percentile) (95 and
milligrams/litre milligrams/litre counts/100 millilitres (95
th
percentile) percentile)
0
5 milligrams/litre th th Jul Jan 6 Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month (95 ≤milligrams/litre 0.50 (50 ≤ 0. ≤ ≤milligrams/litre 0.058 (50 milliSiemens/metre ≤ 65 6.5 (5 percentile) ≤ 130 percentile)
)
Indicator/measure LOWER SAND (
Total Ecological WaterTotal Ecological Requirement (node million =MD2.2) 5.989 cubic metres/annum (31.08% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus conductivity Electrical range pH Escherichia coli
at the
Salinity
.
to support theto
.
Objective water users water Resource Quality Quality Resource The maintenance low flows flows low maintenance The and droughtmust flows be attained to support healthya conditionthe for ecosystem and users. Instream concentration of nutrients must be to sustain maintained aquatic health ecosystem and ensure prescribed the ecological category is met. must salinity The instream be maintained aquatic and ecosystem qualitywater requirements of the levels should not deteriorate. mustpH maintained be present state The pathogens presence of toshould risk a low pose human health.
-
31
Sub component Low flows Low Nutrients Salts System variables Pathogens
Component Quantity Quality
C Category Ecological
2.2 MD MD 2.1, Node
Unit LS1 Resource
River (From (C42F, Dam to confluence) Merriespruit Lower Sand Sand Lower C42G,C42H) C42G,C42H) Allemanskraal Resource Quality Objectives for RIVERS in Resource priority Units in the Integrated Unit of Analysis
:
7 III Class Table
IUA MD 2 MD 2 Sand Lower Lower
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percentile) the Average Average the
th percentile)
ecological th
that (50
(95
n is >5.0.
Numerical limit Numerical
invertebrate ecologicalcategory:≥ - milligrams/litre milligrams/litre monthly flow requirements as as requirements flow monthly percentile) percentile)
milligrams/litre th th 6 ish ecologicalcategory: ≥ C (≥ 62) (50
Instream habitat and Riparian Integrity category ≥ C (≥ 62) F Macro C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C (≥ 62) With specified. 62) (≥ C ≥ category: Quality Water Maintain the current C category ensuring by Score Per Taxo milligrams/litre ≤ 3.0 (50 2.5 ≤ ≤ ≤milligrams/litre 0.125
.
.
of the brate
must be .
integrity and must be utilized be must Conduct aquatic
the Indicator/measure ommunity nvertebrate community i The Rapid Habitat Habitat Rapid The Assessment Method must be implemented Monitor the integrity of the communitya fish at downstream point selected within the Resource Unit A baseline assessment to determine the current healthfish the of c undertaken Fish Response Assessment Index (FRAI) integrity The should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus
Objective Resource Quality Quality Resource Instream and Riparian habitat inmusta be moderately modified condition better. or Instream biota must be in moderately modified condition better or through maintenance habitat, of flows, quality. water The integritythe of macroinvertebrate system the within community must maintained. be Instream concentration of nutrientsmust be improved to sustain aquatic ecosystem and health ensure the prescribed ecological category is met.
-
32 Sub
component Instream Habitat Fish Aquatic Invertebrates Nutrients
Component Habitat Biota Quality
C D Category Ecological
2.2 MD MD 2.1, Node
Unit LS1 LS2 Resource
River (From (C42F, Dam to Rietspruit Rietspruit confluence) Merriespruit Lower Sand Sand Lower C42G,C42H) C42G,C42H) Allemanskraal tributary (C42J) tributary
III III Class
IUA MD2 MD2 MD 2 MD 2 Sand Sand Lower Lower Lower
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688 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
th of (95
th
milliSiemens/ milliSiemens/ .
allowed
n from background from n Numerical limit Numerical
year after publication year date percentile) to be met by themet by topercentile) be
th th percentile) (95 and 9.2
th percentile) percentile) percentile) percentile) percentile) percentile).
year afteryear the publication of date
th th th th th th th 10% variatio 10% 95 6.5 (5 (95 (95 (95
A ≤ 85 milliSiemens/metre milliSiemens/metre ≤ 85 Alimit numerical 185 of metre (95 10 Government Notice. Resource Quality achieved be to limit numerical Objective theby 20 the Government Notice. percentile). concentration is ≤milligrams/litre 0.050 milligrams/litre ≤ 0.1 milligrams/litre ≤0.25 milligrams/litre ≤ 0.25 percentile) ≤milligrams/litre 0.030 milligrams/litre ≤ 0.1
(95 (95 (
rom the
Indicator/measure
conductivity Electrical Theto salinity needs be improved f significantly present state to meet the electrical conductivity required milliSiemens/limit 85 of metre. phased A approach a twenty over periodyear isto be usedthe achieve to limit 85 of milliSiemens/metre. range pH Turbidity Cyanide (free) Aluminium Manganese Iron Uranium Ammonia Nitrogen as
human human present state
dity is
Objective
Resource Quality Quality Resource nstream turbi i Instream salinity must be improved to support the aquatic the and ecosystem qualitywater requirements users and to of water the ensure the prescribed ecological category is met. mustpH maintained be at present state. A baseline assessment to determine the required. toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to health.
-
33
Sub component Salts System variables Toxics
Component Quality
D Category Ecological
Node
Unit LS2 Resource
River Rietspruit Rietspruit tributary (C42J) tributary
III Class
IUA MD2 MD2 Sand Lower Lower
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
/ th
Drought Flows Drought cubic cubic second metres 0.0523 0.0270 0.0187 0.1792 0.1819 0.1120 0.0849 0.0933 0.0849 0.0448 0.0493 0.0876
- - ile
60 70 80 80 80 80 80 70 40 50 80 90 t Per cen
/ Numerical limit Numerical Low Flows
Maintenance Maintenance cubic cubic
second 0.4014 0.7481 0.8658 1.2769 1.5828 1.5177 1.0849 0.6440 0.3306 0.1404 0.1493 0.2986 metres
invertebrate ecologicalcategory:≥ -
further definitive tests required. are Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month
≤ counts/100130 millilitres (95 percentile) Instream habitat and Riparian Integrity category ≥ D (≥ 42) Fish ecologicalcategory: ≥ D (≥ 42) Macro D (≥ 42) 42) (≥ D category≥ Ecostatus Instream Hydrological category ≥ D (≥ 42) With monthly flow requirements as specified. 42) (≥ D ≥ category: Quality Water
ilized.
esponse Ecological Water intenance flows Indicator/measure Ma A screeningAeffluent level whole toxicity testshould conducted at be four toxicity trophicshouldtheshow than levels results greater and 1 (limited acutely not toxic) to Escherichia coli Habitat Rapid The Assessment Method must be implemented. A baseline assessment to determine the integrity fish the of community should be conducted determine to the current and state impacts. localised R Fish Assessment Index (FRAI)must ut be Total Requirement (node 2.3) =MD 43.933 cubic million metres/annum (24.37% Virgin the of AnnualMean Runoff) (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution)
n
Objective
Resource Quality Quality Resource The pathogens presence of toshould risk a low pose human health. Instream and Riparia largely a in be must habitat modifiedcondition better. or Instream biota must be in largely modified condition or better through maintenance of habitat, flows, water quality. flows low maintenance The and droughtmust flows be attained to support healthya conditionthe for ecosystem and users.
-
34 Sub
component Pathogens Instream Habitat Fish flows Low
Biota Habitat Quantity Component
C Category Ecological
2.3 MD Node
Unit LS3 Resource
River (C42J) (C42J) Lower Sand Sand Lower (Downstream the Vet River) to confluence with Rietspruit tributary tributary Rietspruit
III Class
IUA MD2 Sand Lower Lower
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)
th th required. percentile)
percentile) percentile)
th percentile) percentile) th th percentile) percentile
percentile) percentile) percentile)
th th
th th percentile) . th th (95
th
(50 (95
(95
allowed ) ) n from background from n Numerical limit Numerical
percentile) and 9.2percentile) (95 and
th milligrams/litre milligrams/litre percentile
milligrams/litre th 1.0 6 milligrams/litre0.03 (95 milligrams/litre0.072 (95
≤ ≤ 1.5 milligrams/litre (50 milligrams/litre ≤ 1.5 ≤ ≤ ≤milligrams/litre 0.058 (50 milliSiemens/metre ≤ 85 (95 ≤milligrams/litre 0.045 milligrams/litre ≤ 0.1 ≤milligrams/litre 0.25 (95 (95 milligrams/litre ≤ 0.3 ≤ counts/100130 millilitres (95 percentile) 6.5 (5 percentile) variatio A 10% concentration is ≤
itrogen N
as Nitrogenas
Indicator/measure Dissolved Inorganic Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus conductivity Electrical Cyanide (free) Aluminium Manganese Iron Uranium Ammonia screeningAeffluent level whole toxicity testshould conducted at be four toxicity trophicshouldtheshow than levels results greater and 1 (limitedfurther definitive acutely not toxic) to tests are Escherichia coli range pH Turbidity
present state
dity is
.
aquatic aquatic
Objective
Resource Quality Quality Resource nstream turbi i Instream concentration of nutrientsmust be improved to sustain ecosystem and health ensure the prescribed ecological category is met. Salinity levels are Instream high. significantly salinitymust to be improved support the aquatic ecosystem and the water quality requirements the of users.water toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health. The pathogens presence of toshould risk a low pose human health. mustpH maintained be at present state A baseline assessment to determine the required.
-
35
Sub component Nutrients Salts Toxics Pathogens System variables
Quality Quality Component
C Category Ecological
2.3 MD Node
Unit LS3 Resource
River (C42J) (C42J) Lower Sand Sand Lower (Downstream the Vet River) to confluence with Rietspruit tributary tributary Rietspruit
III Class
IUA MD2 MD2 Sand Lower Lower
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category by category by
the Average Score Per Per Average Scorethe Numerical limit Numerical
that that
invertebrate ecologicalcategory:≥ -
h ecologicalh category: ≥ C 62) (≥ .0. 4
Instream habitat and Riparian Integrity category ≥ C (≥ 62) Fis Macro C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C (≥ 62) With monthly flow requirements as specified. 62) (≥ C ≥ category: Quality Water Maintain ecological the D ensuring is >5 Taxon
. ally
of the brate
Conduct aquatic esponse
the Indicator/measure nvertebrate community The Rapid Habitat Habitat Rapid The Assessment Method must be implemented A baseline assessment to determine the integrity of and health the community fish should be conducted to determine current the state and potential impacts the to population. R Fish Assessment Index utilized. be must (FRAI) integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annu using the South African 5 System Scoring methodology.
Objective Resource Quality Quality Resource Instream and Riparian habitat inmusta be moderately modified condition better. or Instream biota must be in moderately modified condition better or through maintenance habitat, of flows, quality. water The integritythe of macroinvertebrate system the within community must maintained. be
-
36 Sub
component Instream Habitat Fish Aquatic Invertebrates
Biota Habitat Component
Category Ecological
Node
Unit Resource
River
Class
IUA
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692 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
- - ile ile
99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 99 Per Per
cent cent
/ percentile)
th percentile) cubic cubic
cubic cubic Drought Flows Drought Flows second second metres/ metres/ 0.0373 0.0386 0.0187 0.0075 0.0289 0.0261 0.0248 0.0336 0.0270 0.0362 0.0351 0.0424 th metres 0.0448 0.0463 0.0224 0.0075 0.0331 0.0299 0.0231 0.0336 0.0309 0.0403 0.0392 0.0471 percentile) (50
th (50
- - - -
ile ile 60 70 80 70 70 70 60 50 50 70 80 60 60 70 80 70 70 70 60 50 50 70 80 70 t t Per Per cen cen (95
/ Numerical limit Numerical Low Flows Low Flows Low Maintenance Maintenance cubic cubic cubic cubic second second metres/ metres/ metres 0.2180 0.3376 0.2950 0.4719 0.6477 0.6481 0.6320 0.3188 0.1917 0.1299 0.1254 0.1539 0.2386 0.3684 0.3218 0.5141 0.7056 0.7056 0.6424 0.3480 0.2099 0.1426 0.1378 0.1690
)
percentile) percentile)
milligrams/litre th 6 Jul Jul Jan Jan Jun Jun Oct Oct Apr Apr Feb Sep Feb Sep Dec Dec Aug Aug Nov Nov Mar Mar May May ≤ 0.020 milligrams/litre ≤ 0.020 Month Month ≤
≤milligrams/litre 0.50 ≤milligrams/litre 0.25 (50
UPPER VET (
the Virgin Virgin the
Indicator/measure
Total Ecological WaterTotal Ecological Requirement ME (node million 18.8611.1) = cubic metres/annum (26.19% of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) WaterTotal Ecological Requirement ME (node million 20.9461.2) = cubic metres/annum (25.59% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus
be category is met.
Objective must ecosystem health ecosystem Resource Quality Quality Resource The maintenance low flows flows low maintenance The and droughtmust flows be attained to support healthya conditionthe for ecosystem and users. Instream concentration of nutrients to sustain maintained aquatic and ensure prescribed the ecological
-
37 Sub component Low flows Low Nutrients
Quality Quantity Component
C Category Ecological
1.2 ME ME 1.1, Node
Unit UV2 Resource UV1 and
tributary (Vet and Leeuspruit Upper Vet Vet Upper catchments) River Dam / Erfenis Dam) catchments to (Klein Vet and (C41A, C41B) (C41C, C41D) Laaispruit tributary Resource Quality Objectives for RIVERS AND DAMS in priority Resource Units the in Integrated Unit of Analysis
:
8 II Class Table
Vet IUA ME1 ME1
Upper Upper
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STAATSKOERANT, 22 APRIL 2016 No. 39943 693
th th
percentile) percentile)
th
.
millilitres (95 millilitres allowed n from background from n (≥ (≥ 62) Numerical limit Numerical
percentile) and 8.4percentile) (95 and invertebrate ecologicalcategory:≥
- th percentile) percentile)
th
≤ 70 milliSiemens/metre milliSiemens/metre ≤ 70 6.5 (5 percentile) variatio A 10% concentration is ≤milligrams/litre 0.072 (95 ≤ counts/100130 percentile) Instream habitat and Riparian Integrity category ≥ C Fish ecologicalcategory: ≥ C (≥ 62) Macro C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C (≥ 62) With monthly flow requirements as specified. 62) (≥ C ≥ category: Quality Water
(95
.
.
must
current
.
must be utilized be must
Indicator/measure
Electrical conductivity Electrical range pH Turbidity Ammonia Nitrogen as Escherichia coli Habitat Rapid The Assessment Method must be implemented A baseline assessment to determine the integrity of and health the community fish be undertaken Fish Response Assessment Index (FRAI)
the
organisms
present state
dity is requireddity
Objective be maintainedbe at
water water users. Resource Quality Quality Resource must nstream salinity must be nstream turbi i maintained to support the aquatic and ecosystem qualitywater requirements of the pH present state. A baseline assessment to determine the toxins of concentrations The level thatshould a be at not istoxic aquatic to and a threat to human health. The pathogens presence of toshould risk a low pose human health. Instream and Riparian habitat inmusta be moderately modified condition better. or Instream biota must be in moderately modified condition better or through maintenance habitat, of flows, quality. water I
-
38
Sub
component Salts System variables Toxics Pathogens Instream Habitat Fish
Biota Quality Habitat Component
C Category Ecological
1.2 ME ME 1.1, Node
Unit UV2 Resource UV1 and
tributary (Vet and Leeuspruit Upper Vet Vet Upper catchments) River Dam / Erfenis Dam) catchments to (Klein Vet and (C41A, C41B) (C41C, C41D) Laaispruit tributary
II Class
Vet IUA ME1 ME1 Upper Upper
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- ile 99 99 99 99 99 99 99 99 99 99 99 99 Per cent Flows
/ th
th
e Average Average e Drought cubic cubic second 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0015 0.0019 metres . ecological
-
-
ile 40 40 20 20 40 50 50 40 40 30 40 50 t Per cen
/ / Numerical limit Numerical Low Flows Low
cubic cubic Maintenance second metres 0.0310 0.0563 0.0474 0.0859 0.1228 0.1247 0.1115 0.0526 0.0243 0.0116 0.0105 0.0166 percentile) and 8.5percentile) (95 and
th
Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month Maintain the current C category that ensuring by th is >Score4.8 Per Taxon (95 milliSiemens/metre ≤ 55 percentile) 6.5 (5 percentile) Instream habitat and Riparian Integrity category ≥ B/C (≥ 78)
.
brate
implemented 2.369 million Conduct aquatic
the Indicator/measure nvertebrate community
The integritythe of i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. WaterTotal Ecological Requirement ME (node 1.3) = cubic metres/annum (61.17% Virgin the of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) conductivity Electrical range pH Habitat Rapid The Assessment Method must be
Objective Resource Quality Quality Resource must be maintainedmust at be
The integritythe of macroinvertebrate system the within community must maintained. be flows low maintenance The and droughtmust flows be attained to support healthya conditionthe for ecosystem and users. Instream salinity must be maintained theat current state aquatic support the to ecosystem and the water quality requirements the of water users. pH present state. Instream and Riparian better habitat inmusta be than moderately modified condition.
-
39
Sub component Aquatic Invertebrates flows Low Salts System variables Instream Habitat
Biota Quality Habitat Quantity Component
B/C Category Ecological
1.3 ME Node
Unit UV3 Resource
(C41E) Soutspruit Soutspruit River Dam /
II Class
Vet IUA ME1 ME1 Upper Upper
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data
percentile)
th percentile)
category by category by th (50
(95
) current B
Numerical limit Numerical
ostatus category ≥ B/C (≥ (≥ B/C ≥ category ostatus
invertebrate ecological category: - percentile) percentile percentile)
milligrams/litre th th th 6 ≤
Fish ecologicalcategory: 78) ≥ B/C (≥ Macro 78) (≥ B/C ≥ Instream Ec 78) Hydrological category ≥B/C (≥ 78) With monthly flow requirements as specified. 78) (≥ B/C ≥ category: Quality Water the Maintain ensuringPer Taxon Average Score the is >5.0. Use Reserveand Desktop Model updatedEcological Present State to requirements. flow determine low ≤milligrams/litre 0.50 ≤milligrams/litre 0.025 ≤milligrams/litre 0.25 ≤milligrams/litre 0.025
(50 (50 (50
of the brate
a -
Conduct aquatic esponse
the
. Indicator/measure nvertebrate community A baseline assessment to determine the integrity of and health the community fish should be conducted to determine current the state R Fish Assessment Index utilized be must (FRAI) integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. Ecological Water Requirement for flows. low maintenance Dissolved Inorganic Nitrogen Nitrogen as Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen Chlorophyll ME
nutrients nutrients Dam shouldDam be
Objective be improved to sustain
Resource Quality Quality Resource must be met to support a
oncentration of 2.1 Instream biota must be in better moderatelythan modified condition through maintenance habitat, of flows, quality. water The integritythe of macroinvertebrate system the within community must maintained. be The downstream flow low maintenance requirements node of healthy conditionfor the ecosystem and users. must ecosystem and water health quality requirements of users.water mesotrophic a in maintained state. C
-
40 Sub
component Fish Aquatic Invertebrates flows Low Nutrients
Biota Quality Quantity Component
Category Ecological
Node
Unit UV4 Resource
River Dam / Erfenis Dam
II Class
Vet IUA ME1 ME1 Upper Upper
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th th
Numerical limit Numerical
percentile) and 8.5percentile) (95 and
th percentile)
th on and ecologicalmust releasesflow on and
≤ 30 milliSiemens/ metre 6.5 (5 percentile) ≤ counts/100130 millilitres (95 percentile) (95 aquatic biota in upstream reaches must be aquaticmust reaches biota in be upstream -
abundances should be determined. Monitoringshould be determined.abundances
torism, abstracti -
Indicator/measure Electrical conductivity Electrical range pH Escherichia coli Themonitored fishmust through population be health assessment studies. Suitable should be conducted annually.
s.
dam must must dam
refuge area area refuge
ovides an Objective ecosystem health health ecosystem qualitywater Resource Quality Quality Resource salinity in the the in salinity the must be managedmust to be must be maintainedmust at be quirements theof
The The be maintained in toorder support and re downstream user water pH present state. The pathogens presence of toshould risk a low pose human health. semi fish for refuge a as and Thethe importance Dam of protected.includes This and recreationally ecologically importantfish species. forThethe importance recreation, Dam eco of be protected. The dam pr important fish and maintain the upstream recruitment.
-
41
Sub
component Salts System variables Pathogens Fish Dam
Biota Habitat Component
Category Ecological
Node
Unit
Resource
River Dam /
Class
IUA
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STAATSKOERANT, 22 APRIL 2016 No. 39943 697
th
th percentile)
th percentile) (50
th (50
(95
requirements as
Numerical limit Numerical
percentile) (95 and 8.5
invertebrate ecological th - percentile) percentile) percentile) percentile) milliSiemens/metre milliSiemens/metre Desktop Reserve Model Reserveand Desktop Model
milligrams/litre th th th 6 6.5 (5
Use updated Present Ecological dataState to requirements. flow determine low milligrams/litre 0.50 ≤ (50 ≤milligrams/litre 0.25 ≤ ≤milligrams/litre 0.030 percentile) ≤ 75 (95 percentile) ≤milligrams/litre 0.072 ≤ counts/100130 millilitres (95th percentile) Instream habitat and Riparian Integrity category ≥ C (≥ 62) Fish ecologicalcategory: ≥ C (≥ 62) Macro category:≥ C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C 62) (≥ flow monthly With specified. 62) (≥ C ≥ category: Quality Water
(95
.
)
esponse current state. Indicator/measure LOWER VET ( Ecological Water Requirement for flows low maintenance 2.1)(ME Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus conductivity Electrical range pH Ammonia Nitrogen as Escherichia coli Habitat Rapid The Assessment Method must be implemented A baseline assessment to integrity determine the and health fish the of community should be conducted determine to the R Fish Assessment Index utilized be must (FRAI)
.
better. The
category is met
Objective
Resource Quality Quality Resource The maintenance low flows flows low maintenance The and droughtmust flows be attained to support healthya conditionthe for ecosystem and users. Instream concentration of nutrientsmust be improved to sustain aquatic ecosystem and health ensure the prescribed ecological Instream salinity must be levels Salinity maintained. should to be allowed not deteriorate. mustpH maintained be at presentstate. toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health. The pathogens presence of toshould risk a low pose human health. Instream and Riparian habitat inmusta be moderately modified condition better. or Instream biota must be in moderately modified condition or requirements fishof species of ecological importance and particularwith and flow qualitywater must needs be provided for.
-
42
Sub
component Low flows Low Nutrients Salts System variables Toxics Pathogens Instream Habitat Fish
Quantity Component Quality Habitat Biota
C Category Ecological
2.1 ME Node
Unit LV1 Resource
the
River tributary) Lower Vet LowerVet (includes (includes C41H, C41J) C41H, C41J) SandDam to Taaibosspruit Taaibosspruit (From Erfenis (C41F, C41G, River confluence)River Resource Quality Objectives for RIVERS in Resource priority Units in the Integrated Unit of Analysis
:
9 III Class Table
Vet IUA ME 2 ME 2 Lower Lower
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
tile
99 60 99 30 99 99 30 cen
r /
Pe must be
0.17 0.13 0.19 0.34 Drought Flows cubic cubic 0.142 0.135 0.071 0.327 0.213 0.269 0.177 0.129 second metres
- -
ile 99 99 99 90 90 99 99 99 99 99 90 99 t
Per cen
/ / 0.00 0.00 0.00 0.00
Maintenance High Flows 2.355 3.462 6.358 second Numerical limit Numerical Low Flows Low Maintenance cubic cubic 0.67 cubic metres cubic per 0.250 0.420 0.446 0.857 0.849 0.701 0.403 0.227 0.129 0.130 0.190 second f > 4.8 must be achieved.must 4.8 f be > metres
th th Jul Jan Jan Jun Oct Oct Apr Apr Feb Sep Feb Dec Dec Aug Nov Nov Mon Mon Mar Mar May Ancategory ecological C of met. The Average Score Per Taxon o value
of the brate Mean Mean community
Conduct aquatic
the an Annual Runoff) Indicator/measure nvertebrate
The integrity integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. low Total Maintenance and droughtflow flow Ecological Water Requirement 15) (EWR = million19.765 cubic metres/annum (7.81% Virgin of the Annual Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) high Total Maintenance Waterflow Ecological Requirement 15) (EWR = 32.309 million cubic metres/annum (12.76% Virgin the of Me Maintenance high flows (percentage value of naturalised flow distribution)
to the
ecological ecological
Objective so that the so that the
Resource Quality Quality Resource The integritythe of macroinvertebrate system the within community must be improved recommended category. The maintenance and droughtmust flows be attained environmental flows requirements met to are supportcondition a healthy for the and ecosystem users. be must flows high The attained environmental flows requirements met to are supportcondition a healthy for the ecosystem
- 43 Sub component Aquatic Invertebrates flows Low Flows High
Component Quantity
C/D Category Ecological
15 EWR Node
Unit LV2 Resource
River C43D) C43D) Lower Vet LowerVet Sand River (Downstream Confluence to (C43A, C43C, Bloemhof Dam)
III Class
Vet IUA ME 2 ME 2 Lower Lower
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99 99 99 99 99 th
percentile)
th
square metre metre square percentile)
n should be
th (50
(95
) milligrams/ Phytoplankton ≤ 0.025 Periphyto
0.00 0.00 0.00 0.00 0.00 a a Numerical limit Numerical - -
percentile) and 9.2percentile) (95 and
milligrams/litre milligrams/litre
th percentile) percentile) percentile) percentile) percentile) percentile) percentile percentile) percentile) percentile) percentile)
milligrams/litre
th th th th th th th th th th th 5 6 Jul Jun Sep Aug May (50 (95 ≤ 0.7 milligrams/litre milligrams/litre ≤ 0.7 ≤ 0.50 ≤ ≤milligrams/litre 0.058 Chlorophyll between ≤ 84 (50 Chlorophyll milligrams/litre (50 ≤ 80 milliSiemens/metre (9 milligrams/litre ≤ 120 (95 ≤100milligrams/litre 6.5 (5 percentile) milligrams/litre ≤ 0.1 (95 ≤milligrams/litre 0.25 (95 milligrams/litre ≤0.75 (95 milligrams/litre ≤ 0.07 (50 (95
nutrient
a
-
ations.
the resource
Indicator/measure Dissolved Inorganic Nitrogen Nitrogen as Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus Chlorophyll concentrations should monitored be a as response indicator against quality objective concentr conductivity Electrical Sulphate Chloride range pH Aluminium Manganese Iron Uranium
health. health. sustain s should not . .
Objective must t be maintained t at be
Resource Quality Quality Resource mus oncentration Instream concentration of nutrients aquatic ecosystem tobe allowed deteriorate. Salinitymust levels be maintained. pH present state toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health. C
-
44
Sub component Nutrients Salts System variables Toxics
Component Quality
C/D Category Ecological
15 EWR Node
Unit LV2 Resource
River C43D) C43D) Lower Vet LowerVet Sand River (Downstream Confluence to (C43A, C43C, Bloemhof Dam)
III Class
Vet IUA ME 2 ME 2 Lower Lower
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700 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
habitat Integrity
Numerical limit Numerical
Ecostatus category≥ C/D (≥ (≥ C/D category≥ Ecostatus
invertebrate ecological - percentile) percentile) percentile)
th th (95 (95 ≤ 0.072 milligrams/litre milligrams/litre ≤ 0.072 ≤ counts/100130 millilitres Instream and Riparian category ≥ C/D 58) (≥ Instream habitat and Riparian Integrity category ≥ C/D 58) (≥ Fish ecologicalcategory:≥ 58) (≥C/D Macro category:≥ C/D 58) (≥ Instream 58) Hydrological category≥ 58) (≥ C/D With monthly flow requirements as specified. 58) (≥ C/D category:≥ Quality Water
. site
and site 15 as as site 15 as site 15
. Ecological for
esponse Indicator/measure Ammonia Nitrogen as screeningAeffluent level whole toxicity testshould conducted at be four toxicity trophicshouldtheshow than levels results greater and 1 (limited further definitive acutely not toxic) to tests required. are Escherichia coli Habitat Rapid The Assessment Method must be implemented ecological The specifications for Ecological Water Requirement determined terms in of the Comprehensive Reserve Determination mustStudy be (2010) implemented ecological The specifications for Ecological Water Requirement determined terms in of the Comprehensive Reserve Determination mustStudy be (2010) implemented. R Fish Assessment Index utilized. be must (FRAI) ecological The specifications thresholds potential of concern Water Requirement must to. adhered 15 be
olled. r
ted. i
Objective argely modified Resource Quality Quality Resource ic invasive riparian plant plant riparian ic invasive The pathogens presence of toshould risk a low pose human health. Instream and Riparian better habitat inmusta be than l condition. Exot species cont must be Instream biota must be in a bettermodified largely than condition. requirements The of species ecological fish of importance and with particular and water flow mustquality be needs provided for.The the value of fish must asRU refuge be migration maintained and lim barriers
-
45 Sub
component Pathogens Instream Habitat Riparian Habitat Fish
Component Quality Habitat Biota
C/D Category Ecological
15 EWR Node
Unit LV2 Resource
River C43D) C43D) Lower Vet LowerVet Sand River (Downstream Confluence to (C43A, C43C, Bloemhof Dam)
III Class
Vet IUA ME 2 ME 2 Lower Lower
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ecological ecological
/D Numerical limit Numerical the Average is > ScorethePer Taxon
Maintain the current C categorySouth African the ensuring by Scoring System 5 score must > be 90 and 4.8.
site and
of the brate Ecological for
Conduct aquatic
the Indicator/measure nvertebrate community
The integrity integrity The i should be determined using Macroinverte Response Assessment Index. biomonitoring annually using the South African 5 System Scoring methodology. ecological The specifications thresholds potential of concern Water Requirement must to. adhered 15 be
Objective maintained. Resource Quality Quality Resource The integritythe of macroinvertebrate system the within community must be
- 46 Sub component Aquatic Invertebrates
Component
Category Ecological
Node
Unit Resource
River
Class
IUA
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
99 90 99 90 20 99 99 99 99 99 99 99
Percentile
Drought Flows Drought 5.21 3.98 cubic cubic 4.284 5.361 5.997 6.486 6.101 5.154 4.441 4.097 3.125 3.415 metre/ metre/ second percentile) percentile) percentile) percentile)
th th
th
percentile)
- -
(50 (50 th ile (50 99 99 99 99 99 99 99 99 99 99 99 99
t Per cen
0.00 14.6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
14.129 72.071 (95 per second Maintenance High Flows
cubic metres cubic
Low Flows Numerical Limit Maintenance Maintenance 7.72 cubic cubic 5.421 6.592 6.783 7.588 9.845 6.521 5.619 5.184 5.035 3.954 4.321
second metres/ metres/ )
milligrams/litre milligrams/litre
milligrams/litre milligrams/litre
Jul
Jan Jun Oct Apr
Feb Sep Dec percentile) Aug Nov Mar May
Month milligrams/litre th Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May 6 0.075 Month 50 ≤ 1.35 ≤ ≤1.65 ( ≤ 0.125 ≤
VAAL RIVER (
a - as Nitrogenas
ean Annual Runoff) Indicator/measure
Total Maintenance Total Maintenance and drought flow low Waterflow Ecological Requirement (EWR million =12) 346.444 cubic metres/annum (22% theof Virgin M Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Total Maintenance Ecological flow high Water Requirement (EWR = 12) 250.042 cubic million metres/annum (15.88% Virgin the of AnnualMean Runoff) Maintenance high flows (percentage value of naturalised distribution) flow Nitrate& Nitrite as Nitrogen Dissolved Inorganic Nitrogen Orthophosphate as Phosphorus Chlorophyll
. and the and the
Quality Quality Objective so that the
Resource Resource The maintenance and droughtmust flows be attained environmental flows requirements met to are supportcondition a healthy for the and ecosystem users. be must flows high The attained so that the environmental flows requirements met to are supportcondition a healthy for the ecosystem Instream concentration of nutrientsmust be improved to sustain aquatic ecosystem and health ensure the prescribed ecological category qualitywater requirements met users are of water the
-
47 Sub component Low flows Low flows High Nutrients
Component Quantity Quality
D Category Ecological
12 EWR Node
Unit VB 1.1 Resource
(From Vaal River River/Dam confluence) to upstream Vermaasdrift Schoonspruit (C24B)
Resource Quality Objectives for RIVERS AND DAMS in priority Resource Units the in Integrated Unit of Analysis
III 10 : Class
Table
MF MF IUA Vaal River
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STAATSKOERANT, 22 APRIL 2016 No. 39943 703
th 9.2 (95 9.2
-
percentile) percentile)
th
Numerical Limit
results show toxicityshow thanresults greater 1 milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre percentile) percentile) percentile) percentile) percentile) percentile) percentile) percentile) percentile) percentile) milliSiemens/metre milliSiemens/metre milligrams/litre percentile)
th th h th th th th th th th th ≤ 70 (95 ≤160 (95 ≤ 33 (95 ≤ 560 (95 7.5 range pH (5 percentile) ≤ 0.050 (95 0.1 ≤ (95 ≤ 0.25 (95 ≤ 0.25 (95 ≤ 0.030 (95 0.1 ≤ (95 ≤ counts/100130 millilitres (95
(free)
Indicator/measure Electrical conductivity Electrical Sulphate Magnesium Solids Total Dissolved range pH Cyanide Aluminium Manganese Iron Uranium Ammonia Nitrogen as screeningAeffluent level whole toxicity testshould conducted at be four trophicshouldthe levels and (limited toxic) further to definitive acutely not required. tests are Escherichia coli
must be
Quality Quality
the water water the
. meet the in the Middle in the Middle maintained at linity
to Objective and
Resource Resource must be he Koekemoerspruit and Instream sa improved recommended ecological category quality requirements the of users water must Vaal The River. river managedbe assimilate to the the of impacts land based activities of and inflow t Schoonspruit. pH present state toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health. The pathogens presence of toshould risk a low pose human health.
-
48
Sub component Salts System variables Toxics Pathogens
Component Quality
D Category Ecological
12 EWR Node
Unit VB 1.1 Resource
(From Vaal River River/Dam confluence) to upstream Vermaasdrift Schoonspruit (C24B)
III Class
MF MF IUA Vaal River
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and health of of and health
e ecologicalcategory:≥ D flow requirementsflow as Numerical Limit
invertebrat -
Instream habitat and Riparian Integrity category ≥ D (≥ 42) Instream habitat and Riparian Integrity category ≥ D (≥ 42) Fish ecologicalcategory: ≥ C (≥ 62) Macro (≥ 42) Habitat requirements specified ecologically and recreationally importantspecies fish aquatic species bird as specified. 42) (≥ D category≥ Ecostatus Instream Hydrological category≥ (≥ D 42) monthly With specified. 42) (≥ D category:≥ Quality Water
.
12 and site site 12
. be
Ecological for
must be
esponse 2 Indicator/measure
The Rapid Habitat Habitat Rapid The Assessment Method must be implemented ecological The specifications for Ecological Water Requirement as determined in terms the of Comprehensive Reserve Determination Study must(2010) implemented ecological The specifications for Ecological Water Requirement as determined in terms the of Comprehensive Reserve Determination Study must(2010) be implemented. R Fish Assessment Index (FRAI) must be utilized. ecological The specifications thresholds potential of concern Water Requirement 1 site adhered to.
provided
Quality Quality Objective Resource Resource
Instream and Riparian largely a in be must habitat modifiedcondition better. or species plant invasive Exotic must be controlled. Instream biota must be in a modifiedlargely condition or better. The specific requirements fishof species of ecological importance and particularwith and flow qualitywater must needs be provided for.specific The requirements bird aquatic of ecological of species importance must for.
-
49 Sub
component Instream Habitat Riparian Habitat Fish
Component Habitat Biota
D Category Ecological
12 EWR Node
Unit VB 1.1 Resource
(From Vaal River River/Dam confluence) to upstream Vermaasdrift Schoonspruit (C24B)
III Class
IUA River MF Vaal
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Drought Flows Drought South African ecological ecological
/D
Low Flows Numerical Limit Maintenance Maintenance
Month Maintain the current C category the ensuring by Scoring System 5 score must >100 be and must value thePer Taxon Average Score be > 5.0. The Specific should PollutionIndex be > 5.0.
.
ical the and
of the brate annually
Ecolog using using should be
for
must be 12 Indicator/measure nvertebrate
The integrity integrity The i community determined Macroinverte Response Assessment Index. Conduct aquatic biomonitoring annually using the South African Scoring System 5 methodology. ecological The specifications thresholds potential of concern Water Requirement site adhered to. shouldAconducted baseline determine assessment thebe to aquatic dam. community the around bird Conduct diatom a assessment Total Maintenance
) and ) -
). The The ).
Quality Quality geographical -
Objective Ardea goliath Resource Resource Gorsachius leuconotus The integritythe of macroinvertebrate system the within community and recommended ecological category must be maintained. Themore supports area and fowl 5000 water occasionally exceeds the bio1% the of population threshold of speciesseveralfowl water although no comprehensive data available. are This is sitesfew South one of in substantialAfrica a holding Whitepopulation a of backed Heron Night ( pairs twenty over Goliath of ( Heron suitability thisof stretch of river for aquatic bird must be populations maintained through proper habitat management. Water quality improvement is nutrientfrom required a perspective. The maintenance and
-
50 Sub component Aquatic Invertebrates Aquatic Birds Diatoms flows Low
Component Biota Quantity
D C/D Category Ecological
2 EWR Node EWR1
Unit VB 1.1 VB 1.2, 1.2, VB Resource
(C24B) Vaal River Vaal River River/Dam
III Class
MF MF IUA Vaal River
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- -
99 99 99 99 99 80 90 99 99 99 99 99 tile Per cen tile
99 90 99 99 50 99 99 99 99 99 99 99 cen Flows r
Pe
0.02 0.06 cubic cubic 0.029 0.043 0.047 0.055 0.073 0.046 0.031 0.024 0.022 0.022 second metres/ metres/ percentile) percentile)
th
percentile)
- - 0
th ile 99 99 90 90 99 99 99 99 99 99 99 90 t
Per cen 0.00 14.6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14.129 92.225 Maintenance High (95 per second
cubic metres cubic
Numerical Limit 10.7 4.78 cubic cubic 7.254 7.732 5.863 5.278 5.177 second metres/ metres/ 11.931 13.892 18.531 15.172 11.532
milligrams/litre (5 milligrams/litre milligrams/litre
Jul
percentile) Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May
Month milligrams/litre th Jul Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar 6 May ≤ ≤ 1.35 ≤ 1.65 (50
as Nitrogenas
distribution) ralised flow Indicator/measure
low flow and drought flow low Waterflow Ecological Requirement (EWR million =13) 309.184 cubic metres/annum (11.65% of the Virgin AnnualMean Runoff) Maintenance flows (percentage value of natu distribution) Drought flows (percentage value of naturalised flow distribution) Total Maintenance Ecological flow high Water Requirement (EWR = 13) 298.797 cubic million metres/annum (11.26% Virgin the of AnnualMean Runoff) Maintenance high flows (percentage value of naturalised flow Nitrate& Nitrite as Nitrogen Dissolved Inorganic Nitrogen
and the and the
Quality Quality healthy conditionhealthy Objective
Resource Resource the ecosystem droughtmust flows be attained so that the environmental flows requirements met to are support a for the and ecosystem users. be must flows high The attained so that the environmental flows requirements met to are supportcondition a healthy for Instream concentration of nutrientsmust be improved to sustain aquatic ecosystem and health ensure the prescribed ecological category qualitywater requirements
-
51 Sub component High flows High Nutrients
Component Quantity Quality
C/D Category Ecological
13 13 EWR Node
Unit VB 1.3 VB 1.3 VB 1.2, 1.2, VB Resource
- -
River River River River Dam Dam (From (From (C24J) (C24J) (C24J) Bloemhof Bloemhof Vaal River Vaal River (From Vals (From Vals River/Dam catchment) catchment) Quaternary Quaternary confluence) confluence) confluence) Schoonspruit Schoonspruit confluence to confluence to confluence to confluence to (C25C, C25F) (C25C, C25F) upstream Vals upstream Vals
III Class
MF MF IUA Vaal River
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percentile) th
9.2 (95
-
Numerical Limit tile) milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre percentile)
milligrams/litre milligrams/litre milligrams/litre milligrams/litre milligrams/litre th milligrams/litre milligrams/litre milligrams/litre milligrams/litre percen percentile) percentile) percentile) percentile) percentile) percentile) percentile) percentile) percentile) percentile) milliSiemens/metre milliSiemens/metre milligrams/litre percentile)
th th th th h th th th th th th th 0.075 0.075 ≤ 0.125 (50 (50 ≤ 70 (95 ≤160 (95 ≤ 33 (95 ≤ 560 (95 7.5 (5 ≤ 0.050 (95 0.1 ≤ (95 ≤ 0.25 (95 ≤ 0.25 (95 ≤ 0.030 (95 0.1 ≤ (95 ≤
whole effluent whole toxicity testshould conducted at be
a
-
(free)
Indicator/measure Orthophosphate as Phosphorus Chlorophyll conductivity Electrical Sulphate Magnesium Solids Total Dissolved range pH Cyanide Aluminium Manganese Iron Uranium Ammonia Nitrogen as level A screening four toxicity trophicshouldtheshow than levels results greater and 1 (limited toxic) further to definitive acutely not required. tests are
.
at
water water must be Quality Quality
the . meet the in the Middle in the Middle linity
to Objective and
Resource Resource of the water users are met users are of water the Instream sa improved recommended ecological category quality requirements the of users water The water Vaal River. resource must be managed to assimilate of impacts the the land activities. based mustpH maintained be present state toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health.
-
52
Sub ics component Tox Salts System variables
Component Quality
C/D Category Ecological
13 EWR Node
Unit VB 1.3 VB 1.2, 1.2, VB Resource
- River River Dam (From (C24J) (C24J) Bloemhof Vaal River Vaal River (From Vals River/Dam catchment) Quaternary confluence) confluence) Schoonspruit confluence to confluence to (C25C, C25F) upstream Vals
III Class
MF MF IUA Vaal River
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Numerical Limit percentile)
th ≤ counts/100130 millilitres (95 Instream habitat and Riparian Integrity category ≥ D (≥ 42) Instream habitat and Riparian Integrity category ≥ D (≥ 42)
13
or site site 13
. Rapid Habitat Indicator/measure Escherichia coli The Assessment Method must be implemented at prescribed intervals as stated in the ecological specifications to ensure that a 10% increase decrease or in current habitat integrity is avoided as this is undesirable. ecological The f specifications Ecological Water Requirement as determined in terms the of Comprehensive Reserve Determination Study must(2010) be implemented ecological The specifications for Ecological Water Requirement as determined in terms the of Comprehensive Reserve Determination Study must(2010) be implemented.
Quality Quality
Objective Resource Resource The pathogens presence of toshould risk a low pose human health. Instream and Riparian largely a in be must habitat modifiedcondition better. or species plant invasive Exotic must be controlled.
-
53 Sub component Pathogens Instream Habitat Riparian Habitat
Component Habitat
Category Ecological
Node
Unit Resource
River/Dam
Class
IUA
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percentile)
th percentile) percentile)
th
9.2 (95 9.2
-
Numerical Limit
invertebrate ecologicalcategory:≥ D percentile) - (95 milligrams/litre
th To ensure this the South African percentile) milliSiemens/metre milliSiemens/metre
th than 5.0.
Fish ecologicalcategory: ≥ C (≥ 62) Macro (≥ 42) Habitat requirements and health of specified ecologically and recreationally importantspecies fish aquatic species bird as specified. 42) (≥ D category≥ Ecostatus Instream Hydrological category≥ (≥ D 42) With monthly flow requirements as specified. 42) (≥ D category:≥ Quality Water Ancategorymust ecological C/D be of met. Scoring System 5 score must >100 be and must value thePer Taxon Average Score > The Specific should PollutionIndex be > 8.9 (C/D category). ≤ 85 (95 ≤ 300 7.5 (5
.
the and and
of the brate
Ecological Ecological using using should be
for for
must be must be
esponse 3 13 Indicator/measure nvertebrate
Fish R Fish Assessment Index (FRAI) must be utilized. ecological The specifications thresholds potential of concern Water Requirement 1 site adhered to. integrity The i community determined Macroinverte Response Assessment Index. Conduct aquatic biomonitoring annually using the South African Scoring System 5 methodology. ecological The specifications thresholds potential of concern Water Requirement site adhered to. Conduct diatom a assessment annually conductivity Electrical Sulphate range pH at
pecific pecific must be Quality Quality
. maintained o sustain the t Objective maintained. Resource Resource
nstream salinity Instream biota must be in a largely modified condition or better. The specific requirements fishof species of ecological importance and particularwith and flow qualitywater must needs be provided for.s The requirements bird aquatic of ecological of species importance must provided for. The integritythe of macroinvertebrate system the within community must be Water quality improvement is nutrientfrom required a perspective. improved aquatic ecosystem. mustpH be present state I
-
54
Sub
component Fish Aquatic Invertebrates Diatoms Salts System variables
Component Biota Quality
D C/D Category Ecological
13 EWR Node
Unit VB2 VB 1.3 VB 1.2, 1.2, VB Resource
-
- River River Dam (From spruit (C24J) (C24J) Bloemhof Vaal River Vaal River (From Vals River/Dam catchment) Quaternary confluence) confluence) Vierfontein Schoonspruit confluence to confluence to (C25C, C25F) upstream Vals
III Class
MF IUA Vaal River
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710 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016
percentile) percentile)
th th percentile) percentile) percentile) percentile) percentile)
percentile) percentile)
th th th th th
percentile) . th
th
9.2 (95
- (95
allowed
n from background from n Numerical Limit milligrams/litre (50 milligrams/litre percentile)
milligrams/litre (95 milligrams/litre (95 milligrams/litre (50 milligrams/litre (50 milligrams/litre (50 milligrams/litre counts/100 millilitres th milligrams/litre (95 milligrams/litre percentile) percentile) percentile) percentile) milliSiemens/metre milliSiemens/metre milliSiemens/metre
milligrams/litre th th th 6 0.05 0.05 ≤ ≤ 0.1 0.1 ≤ ≤ 0.25 ≤ 0.25 updatedUse Reserveand Desktop Model Present Ecological determineState to data requirements. flow low ≤ 1.35 ≤ 1.65 ≤ 0.125 Matjiespruit and Leeudoringspruit: ≤ 55 (95 Ysterspruit, Makwassiespruit and Wolwespruit: ≤ 85 (95 7.5 (5 variatio A 10% concentration is ≤ 130 (95 ≤
a
-
as Nitrogenas
Indicator/measure Aluminium Manganese Iron Ecological Water Requirement for maintenance low flows Nitrate& Nitrite as Nitrogen Dissolved Inorganic Nitrogen Orthophosphate as Phosphorus Chlorophyll conductivity Electrical range pH Turbidity Escherichia coli
must be
Quality Quality the water
present state
dity is requireddity
. assessment to Objective
to support the aquatic support the to Resource Resource nstream salinity nstream turbi i The concentrations of toxins toxins of concentrations The level thatshould a be at not istoxic aquatic to organisms and a threat to human health. The maintenance and droughtmust flows be maintained. Instream concentration of nutrientsmust be improved to sustain aquatic ecosystem and health ensure the prescribed ecological category is met. maintainedthe present at state ecosystem and quality requirements the of users water mustpH maintained be at present state. A baseline determine the The pathogens presence of toshould risk a low pose human health. I
-
55
Sub component Toxics flows Low Nutrients Salts System variables Pathogens
Component Quantity Quality
B and C and B Category Ecological
Node
Unit VB3
Resource
, -
- spruit spruit spruit, spruit, River/Dam Klipspruit, Ysterspruit, Ysterspruit, Makwassie C25C,C25D) C25C,C25D) Leeudoring Matjiespruit, (C24J, C25A, (C24J, C25A, Wolwespruit
III Class
MF MF IUA Vaal River
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(≥ (≥ 62) ry: ≥ B (≥ 82) (≥ B ≥ ry:
Riparian habitat Integrity Integrity habitat Riparian Numerical Limit
invertebrate ecologicalcategory: ≥ invertebrate ecologicalcategory: ≥ - -
Instream habitat and Riparian Integrity category ≥ C (≥ 62) Instream habitat and Riparian Integrity category ≥ B (≥ 82) Instream and category ≥ C (≥ 62) Fish ecologicalcategory:≥ B 82) (≥ Macro B (≥ 82) 82) (≥ B ≥ category Ecostatus Instream Hydrological category ≥B (≥ 82) With monthly flow requirements as specified. Water Quality catego Fish ecologicalcategory:≥ C 62) (≥ Macro C (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ (≥ C 62) With monthly flow requirements as specified. ≥C category: Quality Water
.
effect on effect on
n
esponse Indicator/measure activities use land ll The Rapid Habitat Habitat Rapid The Assessment Method must be implemented activities use land All impacting on the riparian and thus zone causing a resourceswater should be authorised and regulated to prevent deterioration of habitat. the A riparian on impacting shouldzone be authorised and regulated to prevent deterioration the of habitat. A baseline to assessment determine integrity the communityof fish the should be conducted to determine the current state. R Fish Assessment Index (FRAI) must be utilized.
Quality Quality be in a
Objective
Resource Resource Instream and Riparian habitat inmusta be moderately modified condition better. or Instream and Riparian largely a in be must habitat natural condition. Instream and Riparian habitat must moderately modified condition better. or Instream biota must be in a largely natural condition and contribute the to sustainabilityfish the of Vaal in the assemblages River Instream biota must be in a moderately modified condition better or and contribute the to sustainabilityfish the of Vaal in the assemblages River
-
56 Sub
component Instream Habitat Riparian Habitat Fish
Component Habitat Biota
B and C and B Category Ecological
Node
Unit VB3 Resource
, -
- spruit spruit spruit, spruit, River/Dam Klipspruit, Ysterspruit, Ysterspruit, Makwassie C25C,C25D) Leeudoring Matjiespruit, (C24J, C25A, (C24J, C25A, Wolwespruit
III Class
MF MF IUA Vaal River
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percentile)
th percentile)
th percentile)
th (50
(95 verage Score Per Taxon isPer Taxon Score verage Numerical Limit
milligrams/litre milligrams/litre ned. invertebrate ecologicalcategory:≥ C -
percentile) percentile) milliSiemens/metre (95 milliSiemens/metre
milligrams/litre th 6 ≤
ThemustEcological Present be State maintai ≤ 0.091 (50 ≤milligrams/litre 0.25 ≤ 70 Instream habitat and Riparian Integrity category ≥ C (≥ 62) Fish ecologicalcategory: ≥ C (≥ 62) Macro (≥ 62) 62) (≥ C ≥ category Ecostatus Instream Hydrological category ≥ C 62) (≥ With monthly flow requirements to be specified. 62) (≥ C ≥ category: Quality Water Maintain category by currentthe C ensuring A the >5.0.
.
the the of the of the brate brate
using using using should be should be
esponse be implemented Indicator/measure nvertebrate nvertebrate The integrity integrity The i community determined Macroinverte Response Assessment Index. Conduct aquatic biomonitoring annually using the South African Scoring System 5 methodology Orthophosphate as Phosphorus Nitrate& Nitrite as Nitrogen conductivity Electrical Habitat Rapid The Assessment Method must R Fish Assessment Index (FRAI) must be utilized. integrity The i community determined Macroinverte Response Assessment Index. Conduct aquatic
the
must be Quality Quality em. stain be improved be improved su
linity refuge habitatrefuge
to Objective must Resource Resource In order to maintaintheIn to order ecological integrity the of macroinvertebrate Middle the within community tributaries the River Vaal sustainablyneed to be managed. The Present Ecological must State be maintained. Instream concentration of nutrients to sustain aquatic ecosystem and health ensure the present ecological category is maintained. Instream sa improved aquatic ecosyst Instream and Riparian habitat inmusta be moderately modified condition better. or Instream biota must be in moderately modified condition better or through maintenance habitat, of flows, quality. water The importancelower the of reaches as must be sustained. The integritythe of macroinvertebrate system the within community must maintained. be
-
57
Sub
component Aquatic Invertebrates Nutrients Salts Instream Habitat Fish Aquatic Invertebrates
Component Quality Habitat Biota
C Category Ecological
Node
Unit VB4 Resource
River/Dam Sandspruit Sandspruit C25F, C43B) (C25C, C25B,
Class
IUA
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Integrity Integrity
percentile)
percentile) th
th
percentile)
th (50
9.2 (95
(95
-
Numerical Limit milligrams/litre milligrams/litre percentile)
milligrams/litre milligrams/litre
th milligrams/litre milligrams/litre percentile) percentile) percentile) percentile) percentile) milliSiemens/metre milliSiemens/metre
milligrams/litre th th th th 6 ≤ 1.62 (50 ≤ 1.50 ≤ ≤ 0.125 (50 ≤ 80 (95 ≤160 (95 7.5 (5 Instream habitat and Riparian category ≥ D (≥ 42) Instream habitat and Riparian category ≥ D (≥ 42)
must be Scoring Scoring
which which conductivity
as Nitrogenas
ehabilitation Indicator/measure R
biomonitoring biomonitoring annually using the South African System 5 methodology. Dissolved Inorganic Nitrogen Nitrate& Nitrite as Nitrogen Orthophosphate as Phosphorus Electrical Sulphate range pH Ensure that mining on impacting activities the riparian and zone instream habitats are authorised and regulated to prevent deterioration the of habitat. Rehabilitation management plans mustto be developed improve the habitat integrityto a obtain minimum category.D Habitat Rapid The Assessment Method must be implemented undertaken must include the removal invasive of exotic species from the riparian zone.
the
. Salinity Quality Quality be improved be improved to support theto Objective must water users water Resource Resource Instream concentration of nutrients to sustain aquatic ecosystem health. must salinity The instream be maintained aquatic and ecosystem qualitywater requirements of the levels should not deteriorate. mustpH maintained. be Instream and Riparian largely a in be must habitat modifiedcondition better. or plant riparian Invasive species controlled.must be
-
58
Sub component Nutrients Salts System variables Instream Habitat Riparian Habitat
Component Quality Habitat
D Category Ecological
Node
Unit VB5 Resource
- Bamboes River/Dam spruit (C25E)
III Class
MF IUA Vaal River
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- -
ile 99 99 99 99 99 99 99 99 99 99 99 99 t Per cen
42)
5.4
Drought Flows Drought cubic cubic 4.905 5.262 6.403 2.646 6.952 5.489 4.423 3.654 3.617 3.454 4.363 entile) second metres/ metres/ percentile) percentile)
th perc
- - th 99 99 99 99 99 99 99 99 99 99 99 99 tile Per cen
(95
Flows
Numerical Limit 4.46 5.71 cubic cubic 6.333 6.794 6.971 8.266 8.974 7.086 4.717 4.669 5.632 second Maintenance Low Low Maintenance metres/ metres/ 11.052
invertebrate ecologicalcategory:≥ D milligrams/litre (50 milligrams/litre
-
5
milligrams/litre
Jul 6 Jan Jun Oct Apr Feb Sep Dec Aug Nov Mar May Month ≤
Instream habitat and Riparian Integrity category ≥ D (≥ 42) Fish ecologicalcategory: ≥ D (≥ 42) Macro (≥ 42) (≥ D category≥ Ecostatus Instream Hydrological category ≥ D 42) (≥ With monthly flow requirements to be specified. 42) (≥ D ≥ category: Quality Water 0.1 ≤
This This
centrations.
esponse Indicator/measure
A baseline to assessment determine integrity the and health fish the of community should be conducted to determine current the state and potential impacts the to population. assessment should tissue fish a include contamination study to determine heavy metal con R Fish Assessment Index (FRAI) must be utilized. Total Maintenance and drought flow low Waterflow Ecological Requirement (EWR million =16) 360.296 cubic metres/annum the(21.2% Virgin of AnnualMean Runoff) Maintenance flows (percentage value of naturalised flow distribution) Drought flows (percentage value of naturalised flow distribution) Nitrate& Nitrite as Nitrogen
Quality Quality
Objective
Resource Resource Instream biota must be in largely modified condition or better.Thethe importance of reachesmustlower be maintainedfish refuge as speciesand nursery for area Bloemhof the from in moving Dam. The downstream flow low maintenance requirements EWR 16 of support a met to must be healthy conditionfor the ecosystem. Concentration nutrients in of must be improved the dam to sustain ecosystem health
-
59 Sub
component Fish flows Low Nutrients
Component Biota Quantity Quality
Category Ecological
Node
Unit VB6 Resource
Bloemhof Bloemhof River/Dam Dam (C25E, C25F, C43D)
III Class
MF MF IUA Vaal River
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th
percentile)
percentile) percentile) percentile)
th percentile) percentile)
th th percentile) percentile)
percentile) percentile)
th percentile) percentile) percentile)
th
th th th 9.2 (95
-
aquatic biota must be mustaquatic be biota Numerical Limit -
milligrams/litre (50 milligrams/litre (50 percentile)
milligrams/litre (50 milligrams/litre milligrams/litre (95 milligrams/litre th milligrams/litre (95 milligrams/litre percentile) 5 milliSiemens/metre (95 milliSiemens/metre (95 milligrams/litre (95 milligrams/litre
th 0.050 0.050 ≤ 0.2 ≤ ≤ 0.015 ≤ 70 percentile) ≤150 ≤ 80 ≤ 75 ≤ 560 7.5 (5 ≤ counts/100130 millilitres (95 ≤
torism, abstraction ecologicalmust releasesflow and
- a
- conducted annually. conductivity
as Nitrogenas
Indicator/measure Dissolved Inorganic Nitrogen Orthophosphate as Phosphorus Chlorophyll Electrical Sulphate Sodium Chloride Solids Total Dissolved range pH Escherichia coli Themonitored fishmust through population be health assessment studies. Suitableshouldbe determined.Monitoring abundances should be recreation, eco
s.
dam must must dam
Quality Quality
important in
is Objective
ecosystem health health ecosystem qualitywater Resource Resource salinity in the the in salinity the quirements theof
and thequality water requirements users. water of Nutrientmust be levels not toallowed deteriorate. Dam has potentialto the be hypertrophic. Dam should be maintained in a mesotrophic state. The be maintained in toorder support and re downstream user water mustpH maintained. be The pathogens presence of toshould risk a low pose human health. semi for and refuge aquatic fish and a as Thethe importance Dam of protected.includes This and recreationally ecologically importantfish species.The requirements of ecologicallymustfor. important species provide bird forThethe importance Dam of be protected. The dam a refuge provides and area maintaining the upstream species.
-
60
Sub
component Salts System variables Pathogens Dam Habitat Fish
uality Component Habitat Biota Q
Category Ecological
Node
Unit VB6 Resource
Bloemhof Bloemhof River/Dam Dam (C25E, C25F, C43D)
III Class
MF MF IUA Vaal River
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Numerical Limit
Indicator/measure A baseline assessment shouldAconducted baseline determine assessment thebe to aquatic dam. community the around bird the ),
ability of Quality Quality Sterna Objective ).The suit ).The Circus ) and African Marsh ) Resource Resource Phoenicopterus roseus Phoenicopterus mino)r, The dam supports a highsupportsThe dam a number fowl, with water of several mixed heronries supporting variety of a breeding egrets, herons and cormorants. A number of bird species recorded the at thedam and in adjacent terrestrial habitats listed are as threatened species. amongst include These others the Greater Flamingo ( Flamingo Lesser ( ( Tern Caspian caspia Harrier ( ranivorus thefor bird aquatic dam must be populations maintained through proper habitat management.
- 61 Sub component Aquatic Birds
Component Biota
Category Ecological
Node
Unit Resource
River/Dam
Class
IUA
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th
from th
(based on (based on
in balance with with in balance
/mmillion (~48 cubic
3
should not approach the approach 95 should not risks, the water tablelimit water risks, range the the dolomite aquifer dolomite the area. Numerical Limit and shouldcorrelatedbe latest with
–
lligrams/litre (based area inrecharge on i
WMA
emain 100% compliance. 100% emain iver course shouldiver course be regulated.
DolomiteSaturation systems: aquifer levelsshould not be lowered >6metres an below average levelwater depth ~23metres of in toDue stability ground risks, thetable water limitrange compliance 100% remain should Annual abstraction rates should be recharge rates. Abstraction of groundwater within a 500m zone the r Nitrate < 6 m quality dataset). Specified annual trend percentile. based ≤ 50milliSiemens/metre; Conductivity Electrical on typical quality groundwater in aquifersdolomite Specifiedapproachshould thetrend annual 95 not percentile. Dolomite systems:aquifer Saturation levels should not level water >6 an average metresbe lowered below metresthedepth aquifer in dolomite ~23 of area. stability toDue ground should r The allocablevolumes incatchmentthe of the Eye shouldnot be higher than 4Mm metres/annum) dataflow gauge C2H024 at and irrigation flow requirements downstreamthe from Eye historical measurements).flow Proper irrigation schedules be developed need to and compliance).appliedtimes at (100% all Groundwater balance (aquifer and irrigation recharge abstraction) needs to forand dry be assessed wet
(Q)
MIDDLE VAAL
onitoring onitoring Volume comply with comply to in the
measurement at Depth to groundwater Depth to groundwater toDepth groundwater
Abstraction (Q) rate Abstraction - -
- - Nitrate
- Indicator/ Measure Indicator/ Electrical Conductivity
-
Eye Water Level level from elevation. ground Timemonitoringseries level water (Monthly) required to comply with limits. Abstraction m level water series Time (Monthly) required to limits. Nutrients Salts Water Level level m level water series Time (Monthly) required to limits. Abstraction Continuous Flow
GROUNDWATER
62
-
directions in the non the in directions Resource Quality Objective Quality Resource elds during periods). dry Groundwater flow dolomite the of resource part unit aquifer flow shouldfromit be reversed natural not directions towards the drainage systems (specifically Schoonspruit the and cases). Taaiboschspruit Groundwater balance and (aquifer recharge irrigationassessed abstraction) for be to needs cycles and dry securewet groundwater (to yi Nitrate values inthe must recharge area be maintainedsupportto users. domestic water Salinity levels should increase.not Concentrationsmustmaintained at be levels to support users. water The flow at the Schoonspruit Eye must be maintain volume sustainable a at maintained support downstream tothe users. Eye and
Unit SK3 Resource Resource SK 2, SK 4 SK 2, SK
water G2 -
- unit RU G1 RU Ground
Regional and Resource Unit specific Resource Quality Objectives for
- –
11 : IUA MC MC Schoonspruit Schoonspruit Table
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area area
re re in the aquifer should be
Numerical Limit /litre. /litre.
milligrams/litre
specificcalculatedmustfor be recession each rate
A
cycles. Nitrate values inthe should area recharge not increase to milligrams > 2 Electrical conductivity ≤ 50 milliSiemens/met catchment Eye the of Groundwater criteriafor the dolomite based quality on the groundwater criteria the of Schoonspruit dolomite compartment water as Waterobserved the and Sanitation. by Department of The Schoonspruitcatchmentsquare Eye (~5 area kilometremustmanaged area) as be a protected in terms of the Department of Water Affair’s Dolomitic Guidelines 2006). (August Document area, the uselicensed user and on based water compliance status (incubic metres/square kiliometres/annum). Criticalmetres/month. rate: <0.25 Domestic:< 10 milligrams/litre; Stock water:<110 milligrams/litre; <10 Irrigation:
Nitrate (as Nitrogen) Nitrogen) Nitrate (as Nitrate
)/t; )/t; - – n Indicator/ Measure Indicator/ h Electrical Conductivity Electrical -
0
-
annual monitoring =wl on day1; =wl 30; on day =wl - 0 n h dh=(h where t=number days. of h
Bi Nutrients Salts Water Level ground (metres below level) Waterrecession level (wl) rate,dh (metres/day): monitoringWater use dataset Nutrients Annual quality water analysis
level 63
/litre.
term declining water -
should not increase. managed use water meetthe to Resource Quality Objective Quality Resource
Nitratethe should area values in recharge not to increase milligrams 2 > levels Salinity to at must maintained levels be Concentrations support the catchment of the Eye. to long Medium trends shouldmanaged sustainablebe ina manner. The regional groundwater quality criteria should be requirements for domestic, agricultural and or users. industrial
Unit Resource Resource SK 2, SK 4 SK 2, SK VB 3, VB 5,VB VB 3, 6,SK SK 5, SK 7 and R5
dorp dorp water - G2 -
- unit
RU aquifers Venters Ground
–
- Vaal; Vaal;
– Renoster MC IUA
MC - oonspruit MF Schoonspruit; Schoonspruit; MA Sch
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milligrams/litre milligrams/litre ), (<1.0 Copper
milliSiemens/metre for for milliSiemens/metre
) and zinc (<10 and zinc) (<10 igrams/litre /a). milligrams/litre 2 mill Arsenic (<0.05 Numerical Limit
–
/km
3 –
), Iron (<0.5 ). 0.25metres/month
Salinity: for milliSiemens/metre <150 conductivity Electrical domestic use; Total dissolved solidsmilligrams/litre <1000 stock for watering; < 40 conductivity Electrical water irrigation Macro elements milligrams/litre), (<1.0 fluoride for levels Specific (<200 chloride milligrams/litre), (<200 sodium milligrams/litre). (<400 sulphate and milligrams/litre) 100% compliance Domestic Use: Trace metals Cadmium (<0.005 milligrams/litre manganese (<0.4 milligrams/litre For stockRefer and irrigation to appropriate water: guideline. A specific calculatedmust recession rate be for each licensed water user based on the area and use and compliance m (in Critical rate: <
trace metal
Ratio for Irrigation water water Irrigation for Ratio )/t; )/t; n Indicator/ Measure Indicator/ h -
0
=wl on day1; =wl 30; on day =wl 0 n h dh=(h where t=number days. of h
Electrical conductivity and specific macrofor use; domestic elements Electrical Conductivity and Sodium Adsorption use. Annual quality water analysis. specific Toxics: constituents. Annual quality water analysesmust be undertaken. level) ground Water Level (m below Waterrecession level (wl) rate,dh (metres/day): monitoringWater use dataset
64
term declining levelwater - Resource Quality Objective Quality Resource Medium to long Medium trends should sustainableremain
UV2, Unit VB6 LV1, LV2, LV2, LV1, LS2, LS1, Resource Resource UV3, UV4, US2, US3, VB4, VB2, UV1, V4, V5, R2, R3, R4, R5, VB 3, VB 5,VB VB 3, 6,SK SK 5, LS3, V2, V3, V3, V2, LS3, SK 7 and R5
dorp dorp water - - unit
aquifers Venters Ground Karoo aquifers Karoo
-
–
Vaal; Vaal;
Lower
– Renoster - MC IUA
Renoster, Renoster, Vals, MD1 -
- - Vaal to - MF Upper Sand, Sand, Upper Sand, ME1 Sand,
MD2 Schoonspruit; Schoonspruit; MA Lower Vet, MF -
MA Dam Bloemhof MB Upper Vet, ME2 Upper Vet, -
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milligrams/litre milligrams/litre
), (<1.0 Copper
) and Zinc) (<10 bic metres/annum)
Category B investigation; B investigation; Category
- Category C investigation investigation C Category milligrams/litre
Category A investigation,Category milligrams/litre -
Average recharge (based on the - Arsenic (<0.05 100% Numerical Limit milligrams/litre;
- –
–
), Iron (<0.5 ). and irrigation water: Referand irrigation to water: appropriate
Abstraction rate < licensed recharge average area estimation). Stress <60% Index Stress Index =60 and Stress >100% Index cu (million Registration Use Water Domestic use:<10 Stock use:<110milligrams/litre; water milligrams/litre <10 use: Irrigation for milliSiemens/metre <150 conductivity Electrical domestic use; Total dissolved solidsmilligrams/litre <1000 stock for watering; for milliSiemens/metre 40 < conductivity Electrical water irrigation Macro elements milligrams/litre), (<1.0 fluoride for levels Specific (<200 chloride milligrams/litre), (<200 sodium milligrams/litre). (<400 sulphate and milligrams/litre) 100% compliance Domestic Use: Trace metals Cadmium (<0.005 milligrams/litre Manganese (<0.4 milligrams/litre For stock guideline.
1
/a) and /a) and
2
/a). 2 Q (mm/km
horisations
Indicator/ Measure Indicator/ /a). 2
WaterSchedule Reserve, use > and General Aut Abstraction rate recharge (mm/km (Refer to Resources Groundwater Assessment Phase II more or recent updated recharge estimation in mm/km SI(%): Index, Stress local Estimate SI(%)=Use (Q)/Recharge Nutrients: Nitrate Nitrogen) (as Annual quality water analysis Salts: Electrical conductivity and specific macrofor domestic all elements use. Electrical Conductivity and Sodium Adsorptionfor Ratio Irrigation waters. Annual quality water analysis. Toxics: Specific trace metal constituents Annual quality water analysesmust be undertaken.
65
/a) ishigher than 3 Resource Quality Objective Quality Resource
. Where use water (m requirements for1 and Schedule Reserve, General Authorizations, balance between annual recharge and abstraction on specified property (hectares) area satisfied.must be The regional groundwater quality criteria shouldbe based on the usewater requirement for domestic, agricultural industrialor and limits
Unit VB6 LV1, LV2, LV2, LV1, LS2, LS1, Resource Resource UV1, UV2, UV3, UV4, US2, US3, VB4, VB2, V4, V5, R2, R3, R4, R5, LS3, V2, V3, V3, V2, LS3,
water - unit Ground Karoo aquifers Karoo
-
Lower
- IUA Renoster, Renoster, Vals, MD1
- - Vaal to - Upper Sand, Sand, Upper Sand, ME1 Sand,
MD2 Lower Vet, MF -
MA Dam Bloemhof MB Upper Vet, ME2 Upper Vet, -
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