The Bronkhorstspruit and Wilge River Conservancy Association (Gca067)
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Investigation of Stratification in the Vaal Dam Using Electrical Conductivity Profiling
Investigation of Stratification in the Vaal Dam using Electrical Conductivity Profiling Reveck Hariram*, Nicolene Van der Walt** Rand Water, Scientific Services Division, P.O. Box 1127, Johannesburg, 2000, South Africa E-mail: [email protected] ; [email protected]; Tel: +2711 682 0479/0735 ABSTRACT water to more than 11 million people in South Africa. Purifying it and selling it to various Municipalities, mines and industries. The Vaal Dam is continuously monitored to provide an early warning of changes to water quality so that the configuration of the water treatment plant can be adapted to ensure only the best quality water is supplied to our customers. er quality by sampling bi-monthly at four strategically located sampling sites. The two major tributaries entering the Vaal Dam are monitored, namely the Wilge and Vaal River respectively. Furthermore, the water quality at the confluence of these tributaries is also monitored together with the most essential It has been found that the electrical conductivity in the Vaal Dam has been relatively consistent over the years (2003 to 2014) with an average of 25 mS/m. The salinity of the Vaal Dam is greatly influenced by the water quality of the two major tributaries (Wilge and Vaal) and the source water from Lesotho (via Lesotho Highlands Water Scheme) that feeds into the Wilge tributary. The purpose of this study was to investigate and verify if any stratification occurs in the Vaal Dam as previous studies indicated no stratification. In 2014, a new monitoring tool was utilized called the CastAway- CTD. The instrument can be lowered into a river or dam capturing data such as GPS position, conductivity and depth along the vertical profile. -
Meso-Archaean and Palaeo-Proterozoic Sedimentary Sequence Stratigraphy of the Kaapvaal Craton
Marine and Petroleum Geology 33 (2012) 92e116 Contents lists available at SciVerse ScienceDirect Marine and Petroleum Geology journal homepage: www.elsevier.com/locate/marpetgeo Meso-Archaean and Palaeo-Proterozoic sedimentary sequence stratigraphy of the Kaapvaal Craton Adam J. Bumby a,*, Patrick G. Eriksson a, Octavian Catuneanu b, David R. Nelson c, Martin J. Rigby a,1 a Department of Geology, University of Pretoria, Pretoria 0002, South Africa b Department of Earth and Atmospheric Sciences, University of Alberta, Canada c SIMS Laboratory, School of Natural Sciences, University of Western Sydney, Hawkesbury Campus, Richmond, NSW 2753, Australia article info abstract Article history: The Kaapvaal Craton hosts a number of Precambrian sedimentary successions which were deposited Received 31 August 2010 between 3105 Ma (Dominion Group) and 1700 Ma (Waterberg Group) Although younger Precambrian Received in revised form sedimentary sequences outcrop within southern Africa, they are restricted either to the margins of the 27 September 2011 Kaapvaal Craton, or are underlain by orogenic belts off the edge of the craton. The basins considered in Accepted 30 September 2011 this work are those which host the Witwatersrand and Pongola, Ventersdorp, Transvaal and Waterberg Available online 8 October 2011 strata. Many of these basins can be considered to have formed as a response to reactivation along lineaments, which had initially formed by accretion processes during the amalgamation of the craton Keywords: Kaapvaal during the Mid-Archaean. Faulting along these lineaments controlled sedimentation either directly by Witwatersrand controlling the basin margins, or indirectly by controlling the sediment source areas. Other basins are Ventersdorp likely to be more controlled by thermal affects associated with mantle plumes. -
The Search for Cryptosporidium Oocysts and Giardia Cysts in Source Water Used for Purification
The search for Cryptosporidium oocysts and Giardia cysts in source water used for purification M Grundlingh* and CME de Wet Rand Water, Microbiology Laboratory, Scientific Services, PO Box 3526, Vereeniging 1930, South Africa Abstract Cryptosporidium and Giardia are intestinal parasites which cause a self limiting gastro-enteritis, in healthy people but severe and often fatal disease in immuno-compromised individuals. Both organisms are characterised by the ability to survive in an aquatic environment with Cryptosporidium having a high tolerance to most of the drinking water disinfectants. The absence of bacteria associated with feacal pollution does not necessarily indicate the absence of Cryptosporidium or Giardia. Being a common cause of waterborne disease, the requirement for detecting the presence of these organisms in environmental and treated water samples is growing. Although cysts and oocysts can be found in natural waters from any source, the risks of contamination are much greater in surface waters than in ground waters. A number of waterborne outbreaks of cryptosporidiosis, from potable and recreational water have been recorded. In many cases these outbreaks have occurred from water that complies to current microbiology standards. Introduction finished waters during the treatment process, which may result in additional interference. Organisms and debris that autofluoresce or The potential occurrence of Cryptosporidium oocysts and Giardia demonstrate non-specific fluorescence, such as algal and yeast cysts in water supplies is a significant issue for the water industry cells, when examined by epifluorescent microscopy, may interfere since outbreaks have been reported in Milwaukee, New Jersey, with the detection of oocysts and cysts and contribute to false North West (UK) and more recently in Sydney, Australia. -
Feasibility Study of Botterkloof and Merino II Hydropower Sites
Feasibility Study of Botterkloof and Merino II Hydropower Sites Presented By BJ Rochecouste Collet W: aurecongroup.com E: [email protected] T: +27 12 427 3144 History & Treaty Lesotho Highlands Water Project delivers water from the Mountains of Lesotho to South Africa by means of dams and tunnels constructed which discharges in the Ash River, near Clarens, Free State Province. Several phases were envisaged. A Treaty between the two governments was signed to ensure the delivery of an average flow of 24.5 m3/s (based on an annual volume) which is applicable to Phase 1 (1A and 1B). New Treaty for Phase 2 states that delivery of (additional) water from Phase 2 would be “on-demand” based on the volume required to compensate the yield of the Vaal catchment (including existing transfers). Scope of Services Aurecon Scope of Services Include: •The Environmental studies; •The Geotechnical Investigation; •The assistance for the WUL application ; •The Interconnections studies; •The Technical Feasibility Study; •Necessary assistance in the bid submission to the DoE for the REIPP programme; •The Detailed Design, Project Management & Construction Supervision. Ash River Reserve Flow (Minimum Maintenance Low Flow): 50 l/s. Phase 1 (A & B) annual flowrate: 24.5 m3/s. Flows into the Liebensbergvlei, then into the Wilge River and thereafter into the Vaal River. Serious erosion problems which lead to construction of several structures to reduce the flow velocity and minimise erosion. Hydrology & Future Flows Year Increase in Yield from Total Mean Annual Flow Phase 2 (m3/s) (m3/s) 2012 - 24.5 2014 - 24.5 2020 5.0 29.5 2025 5.0 29.5 2026 5.2 29.7 2030 6.8 31.3 2034 8.5 33.0 2038 10.1 34.6 Hydrology & Future Flows (Cont.) Botterkloof/Stortemelk Site Project Location The Stortemelk Site is located approximately 1.6 km downstream of the Ash River Outfall at the existing Boston A Dam. -
Fezile Dabi Magisterial District
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Public Libraries in the Free State
Department of Sport, Arts, Culture & Recreation Directorate Library and Archive Services PUBLIC LIBRARIES IN THE FREE STATE MOTHEO DISTRICT NAME OF FRONTLINE TYPE OF LEVEL OF TOWN/STREET/STREET STAND GPS COORDINATES SERVICES RENDERED SPECIAL SERVICES AND SERVICE STANDARDS POPULATION SERVED CONTACT DETAILS REGISTERED PERIODICALS AND OFFICE FRONTLINE SERVICE NUMBER NUMBER PROGRAMMES CENTER/OFFICE MANAGER MEMBERS NEWSPAPERS AVAILABLE IN OFFICE LIBRARY: (CHARTER) Bainsvlei Public Library Public Library Library Boerneef Street, P O Information and Reference Library hours: 446 142 Ms K Niewoudt Tel: (051) 5525 Car SA Box 37352, Services Ma-Tue, Thu-Fri: 10:00- (Metro) 446-3180 Fair Lady LANGENHOVENPARK, Outreach Services 17:00 Fax: (051) 446-1997 Finesse BLOEMFONTEIN, 9330 Electronic Books Wed: 10:00-18:00 karien.nieuwoudt@mangau Hoezit Government Info Services Sat: 8:30-12:00 ng.co.za Huisgenoot Study Facilities Prescribed books of tertiary Idees Institutions Landbouweekblad Computer Services: National Geographic Internet Access Rapport Word Processing Rooi Rose SA Garden and Home SA Sports Illustrated Sarie The New Age Volksblad Your Family Bloemfontein City Public Library Library c/o 64 Charles Information and Reference Library hours: 443 142 Ms Mpumie Mnyanda 6489 Library Street/West Burger St, P Services Ma-Tue, Thu-Fri: 10:00- (Metro) 051 405 8583 Africa Geographic O Box 1029, Outreach Services 17:00 Architect and Builder BLOEMFONTEIN, 9300 Electronic Books Wed: 10:00-18:00 Tel: (051) 405-8583 Better Homes and Garden n Government Info -
Steynsrus HOME 146 !C VARKENSPAN 112 NEWTON 620 Spruit 888 # # # !C BOTE`S NURSERY 221 2440 ONVERWACHT OLIEVENHOUT R SURBITON !
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Vote 9 Aepre 2019 2
Vote 9 Department of Public Works & Infrastructure Adjusted budget summary 2019/20 Main Special Adjusted R thousand appropriation appropriation appropriation Decrease Increase Total amount to be appropriated 1 803 273 - 1 800 773 (98 963) 96 463 of which economic classification: Current payments 1 199 050 1 274 324 (5 000) 80 274 Transfers and subsidies 389 502 405 691 16 189 Payments for capital assets 214 721 120 758 (93 963) Payments for financial assets - of which source of funding: - - 0 (43 890) 43 890 Equitable Share 1 118 747 1 171 320 52 573 Conditional Grants 6 966 6 966 Earmarked funds 564 773 509 700 (55 073) Provincial Receipts 112 787 112 787 Direct charge against the Provincial Revenue Fund 1 803 273 - 1 800 773 (55 073) 52 573 Amount not to be appropriated - Aid Assistance - Executive Authority MEC for Public Works and Infrastructure Accounting Officer Head of Department: Public Works and Infrastructure Website address www.fsworks.gov.za Aim Public Works and Infrastructure is a department committed to the provision, promotion and sound management of assets and infrastructure systems that are safe, affordable, reliable, accessible and sustainable built infrastructure. Changes to programme purposes, objectives and measures The Department of Public Works and Infrastructure will not change any of the purposes, objectives and measures during the 2019/20 financial year. All programmes remain as per the tabled Annual Performance Plan. Adjusted Estimates of Provincial Revenue & Expenditure 2019 Table 9.1(a): Adjusted Estimates per programme 2019/20 Programme Adjustment appropriation Declared Total Main Special Unforeseeable Virements unspent Other adjustment Adjusted R'thousand appropriation appropriation Roll-overs /unavoidable and shifts funds adjustments appropriation appropriation 1. -
Conference Proceedings 2006
FOSAF THE FEDERATION OF SOUTHERN AFRICAN FLYFISHERS PROCEEDINGS OF THE 10 TH YELLOWFISH WORKING GROUP CONFERENCE STERKFONTEIN DAM, HARRISMITH 07 – 09 APRIL 2006 Edited by Peter Arderne PRINTING & DISTRIBUTION SPONSORED BY: sappi 1 CONTENTS Page List of participants 3 Press release 4 Chairman’s address -Bill Mincher 5 The effects of pollution on fish and people – Dr Steve Mitchell 7 DWAF Quality Status Report – Upper Vaal Management Area 2000 – 2005 - Riana 9 Munnik Water: The full picture of quality management & technology demand – Dries Louw 17 Fish kills in the Vaal: What went wrong? – Francois van Wyk 18 Water Pollution: The viewpoint of Eco-Care Trust – Mornē Viljoen 19 Why the fish kills in the Vaal? –Synthesis of the five preceding presentations 22 – Dr Steve Mitchell The Elands River Yellowfish Conservation Area – George McAllister 23 Status of the yellowfish populations in Limpopo Province – Paul Fouche 25 North West provincial report on the status of the yellowfish species – Daan Buijs & 34 Hermien Roux Status of yellowfish in KZN Province – Rob Karssing 40 Status of the yellowfish populations in the Western Cape – Dean Impson 44 Regional Report: Northern Cape (post meeting)– Ramogale Sekwele 50 Yellowfish conservation in the Free State Province – Pierre de Villiers 63 A bottom-up approach to freshwater conservation in the Orange Vaal River basin – 66 Pierre de Villiers Status of the yellowfish populations in Gauteng Province – Piet Muller 69 Yellowfish research: A reality to face – Dr Wynand Vlok 72 Assessing the distribution & flow requirements of endemic cyprinids in the Olifants- 86 Doring river system - Bruce Paxton Yellowfish genetics projects update – Dr Wynand Vlok on behalf of Prof. -
Review of Existing Infrastructure in the Orange River Catchment
Study Name: Orange River Integrated Water Resources Management Plan Report Title: Review of Existing Infrastructure in the Orange River Catchment Submitted By: WRP Consulting Engineers, Jeffares and Green, Sechaba Consulting, WCE Pty Ltd, Water Surveys Botswana (Pty) Ltd Authors: A Jeleni, H Mare Date of Issue: November 2007 Distribution: Botswana: DWA: 2 copies (Katai, Setloboko) Lesotho: Commissioner of Water: 2 copies (Ramosoeu, Nthathakane) Namibia: MAWRD: 2 copies (Amakali) South Africa: DWAF: 2 copies (Pyke, van Niekerk) GTZ: 2 copies (Vogel, Mpho) Reports: Review of Existing Infrastructure in the Orange River Catchment Review of Surface Hydrology in the Orange River Catchment Flood Management Evaluation of the Orange River Review of Groundwater Resources in the Orange River Catchment Environmental Considerations Pertaining to the Orange River Summary of Water Requirements from the Orange River Water Quality in the Orange River Demographic and Economic Activity in the four Orange Basin States Current Analytical Methods and Technical Capacity of the four Orange Basin States Institutional Structures in the four Orange Basin States Legislation and Legal Issues Surrounding the Orange River Catchment Summary Report TABLE OF CONTENTS 1 INTRODUCTION ..................................................................................................................... 6 1.1 General ......................................................................................................................... 6 1.2 Objective of the study ................................................................................................ -
Government Gazette Staatskoerant REPUBLIC of SOUTH AFRICA REPUBLIEK VAN SUID-AFRIKA
Government Gazette Staatskoerant REPUBLIC OF SOUTH AFRICA REPUBLIEK VAN SUID-AFRIKA July Vol. 661 Pretoria, 10 2020 Julie No. 43516 PART 1 OF 2 LEGAL NOTICES A WETLIKE KENNISGEWINGS ISSN 1682-5843 N.B. The Government Printing Works will 43516 not be held responsible for the quality of “Hard Copies” or “Electronic Files” submitted for publication purposes 9 771682 584003 AIDS HELPLINE: 0800-0123-22 Prevention is the cure 2 No. 43516 GOVERNMENT GAZETTE, 10 JULY 2020 IMPORTANT NOTICE OF OFFICE RELOCATION Private Bag X85, PRETORIA, 0001 149 Bosman Street, PRETORIA Tel: 012 748 6197, Website: www.gpwonline.co.za URGENT NOTICE TO OUR VALUED CUSTOMERS: PUBLICATIONS OFFICE’S RELOCATION HAS BEEN TEMPORARILY SUSPENDED. Please be advised that the GPW Publications office will no longer move to 88 Visagie Street as indicated in the previous notices. The move has been suspended due to the fact that the new building in 88 Visagie Street is not ready for occupation yet. We will later on issue another notice informing you of the new date of relocation. We are doing everything possible to ensure that our service to you is not disrupted. As things stand, we will continue providing you with our normal service from the current location at 196 Paul Kruger Street, Masada building. Customers who seek further information and or have any questions or concerns are free to contact us through telephone 012 748 6066 or email Ms Maureen Toka at [email protected] or cell phone at 082 859 4910. Please note that you will still be able to download gazettes free of charge from our website www.gpwonline.co.za. -
Labeo Capensis (Orange River Mudfish) Ecological Risk Screening Summary
Orange River Mudfish (Labeo capensis) Ecological Risk Screening Summary U.S. Fish & Wildlife Service, 2014 Revised, May and July 2019 Web Version, 9/19/2019 Image: G. A. Boulenger. Public domain. Available: https://archive.org/stream/catalogueoffres01brit/catalogueoffres01brit. (July 2019). 1 Native Range and Status in the United States Native Range From Froese and Pauly (2019): “Africa: within the drainage basin of the Orange-Vaal River system [located in Lesotho, Namibia, and South Africa] to which it is possibly restricted. Hitherto thought to occur in the Limpopo system and in southern Cape watersheds [South Africa] which records may be erroneous.” From Barkhuizen et al. (2017): “Native: Lesotho; Namibia; South Africa (Eastern Cape Province - Introduced, Free State, Gauteng, Mpumalanga, Northern Cape Province, North-West Province)” 1 Status in the United States This species has not been reported as introduced or established in the United States. There is no indication that this species is in trade in the United States. Means of Introductions in the United States This species has not been reported as introduced or established in the United States. Remarks A previous version of this ERSS was published in 2014. 2 Biology and Ecology Taxonomic Hierarchy and Taxonomic Standing From ITIS (2019): “Kingdom Animalia Subkingdom Bilateria Infrakingdom Deuterostomia Phylum Chordata Subphylum Vertebrata Infraphylum Gnathostomata Superclass Actinopterygii Class Teleostei Superorder Ostariophysi Order Cypriniformes Superfamily Cyprinoidea Family Cyprinidae Genus Labeo Species Labeo capensis (Smith, 1841)” From Fricke et al. (2019): “Current status: Valid as Labeo capensis (Smith 1841). Cyprinidae: Labeoninae.” Size, Weight, and Age Range From Froese and Pauly (2019): “Max length : 50.0 cm FL male/unsexed; [de Moor and Bruton 1988]; common length : 45.0 cm FL male/unsexed; [Lévêque and Daget 1984]; max.