Mzimvubu Status Quo Delin Rep DRAFT 21022017
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WP 11004 DETERMINATION OF WATER RESOURCE CLASSES AND RESOURCE QUALITY OBJECTIVES FOR THE WATER RESOURCES IN THE MZIMVUBU CATCHMENT STATUS QUO AND (RU AND IUA) DELINEATION REPORT February 2017 Report Number: WE/WMA7/00/CON/CLA/0316 Published by Department of Water and Sanitation Private Bag X313 PRETORIA, 0001 Republic of South Africa Tel: +27 (12) 336 7500 Fax: +27 (12) 323 0321 Copyright reserved No part of this publication may be reproduced in any manner without full acknowledgement of the source This report should be cited as: Department of Water and Sanitation (DWS), South Africa, 2017. Determination of Water Resource Classes and Resource Quality Objectives for Water Resources in the Mzimvubu Catchment. Status Quo and (RU and IUA) Delineation Report. Compiled by Rivers for Africa eFlows Consulting (Pty) Ltd. for Scherman Colloty and Associates cc. Report no. WE/WMA7/00/CON/CLA/0316 Compiled by: Scherman Colloty & Associates cc 22 Somerset Street Grahamstown 6139 DOCUMENT INDEX Report name Report number Inception Report WE/WMA7/00/CON/CLA/0116 Survey Report WE/WMA7/00/CON/CLA/0216 Status Quo and (RU and IUA) Delineation Report WE/WMA7/00/CON/CLA/0316 River Workshop Report WE/WMA7/00/CON/CLA/WKSP/0117 River Desktop EWR and Modelling Report WE/WMA7/00/CON/CLA/0217 BHNR Report (Surface and Groundwater) WE/WMA7/00/CON/CLA/0317 Estuary Workshop Report WE/WMA7/00/CON/CLA/WKSP/0417 Scenario Description Report WE/WMA7/00/CON/CLA/0517 River EWR Report WE/WMA7/00/CON/CLA/0617 Estuary EWR Report WE/WMA7/00/CON/CLA/0717 Groundwater Report WE/WMA7/00/CON/CLA/0817 Wetland EcoClassification Report WE/WMA7/00/CON/CLA/0917 Scenario Non-ecological Consequences Report WE/WMA7/00/CON/CLA/1017 Ecological Consequences Report WE/WMA7/00/CON/CLA/1117 WRC and Catchment Configuration Report WE/WMA7/00/CON/CLA/0118 River and Estuary RQO Report WE/WMA7/00/CON/CLA/0218 Wetlands and Groundwater RQO Report WE/WMA7/00/CON/CLA/0317 Monitoring and Implementation Report WE/WMA7/00/CON/CLA/0418 Water Resource Classes and RQOs Gazette Template Input WE/WMA7/00/CON/CLA/0518 Main Report WE/WMA7/00/CON/CLA/0618a Close Out Report WE/WMA7/00/CON/CLA/0618b Issues and Response Report WE/WMA7/00/CON/CLA/0718 Bold indicates this report Determination of Water Resource Classes and Resource Quality Objectives for the Water Resources in the Mzimvubu Catchment Project No. WP 11004 / Status Quo and (RU and IUA) Delineation Report Page i APPROVAL TITLE: Status Quo and (RU and IUA) Delineation Report DATE: February 2017 AUTHORS: Huggins G, Kotze P, Louw D, Mackenzie J, Mullins W, Sami K, Scherman P, Talanda C, Taljaard S and van Niekerk L EDITOR: Gowans L REVIEWERS: Project Management Team LEAD CONSULTANT: Scherman Colloty & Associates cc REPORT NO: WE/WMA7/00/CON/CLA/0316 FORMAT: MSWord and PDF WEB ADDRESS: http://www.dws.gov.za Approved for Scherman Colloty & Associates cc: _________________________________ Dr Patsy Scherman Study Leader Supported by: Recommended by: _________________________________ ________________________________ Lawrence Mulangaphuma Ms Lebogang Matlala Project Manager Director: Water Resource Classification Approved for the Department of Water and Sanitation by: _________________________________ Ms Ndileka Mohapi Chief Director: Water Ecosystems Determination of Water Resource Classes and Resource Quality Objectives for the Water Resources in the Mzimvubu Catchment Project No. WP 11004 / Status Quo and (RU and IUA) Delineation Report Page ii ACKNOWLEDGEMENTS The following persons contributed to this project. Project Management Team Matlala, L DWS: Water Ecosystems; Classification Mulangaphuma, L DWS: Water Ecosystems; Classification Scherman, P-A Scherman Colloty & Associates cc Sauer, J Scherman Colloty & Associates cc Weni, E DWS: Eastern Cape Regional Office Weston, B DWS: Water Ecosystems; Surface Water Reserves Neswiswi, T DWS: Water Ecosystems; Surface Water Reserves Kganetsi, M DWS: Resource Protection and Waste Molokomme, L DWS: Water Ecosystems; Groundwater Reserves Muthraparsad, N DWS: Environment and Recreation Thompson, I DWS: Integrated Water Resource Planning Matume, M DWS: Stakeholder Engagement and Coordination Cilliers, G DWS: Resource Quality Information Services Majola, S DWS: Resource Quality Information Services Determination of Water Resource Classes and Resource Quality Objectives for the Water Resources in the Mzimvubu Catchment Project No. WP 11004 / Status Quo and (RU and IUA) Delineation Report Page iii AUTHORS The following persons contributed to this report: Author Company Huggins, G Nomad Consulting Kotze, P Clean Stream Biological Services Louw, D Rivers for Africa eFlows Consulting (Pty) Ltd Mackenzie, J Mackenzie Ecological and Development Services cc Mullins, W Mosaka Economists Sami, K WSM Leshika Consulting (Pty) Ltd Scherman, P Scherman Colloty & Associates cc Talanda, C WRP Consulting Engineers (Pty) Ltd Taljaard, S Council for Scientific and Industrial Research Van Niekerk, L Council for Scientific and Industrial Research GIS support: Sandra MacFadyen Specialist contribution to delineation: Pieter van Rooyen, WRP Consulting Engineers (Pty) Ltd REPORT SCHEDULE Version Date First draft November 2016 Second draft February 2017 Final Determination of Water Resource Classes and Resource Quality Objectives for the Water Resources in the Mzimvubu Catchment Project No. WP 11004 / Status Quo and (RU and IUA) Delineation Report Page iv EXECUTIVE SUMMARY INTRODUCTION This report represents the following volumes of information: . Volume A: Preliminary status quo of the area o This section covers the preliminary status quo of all study components. Volume B: Prioritisation o This section evaluates importance and prioritises reaches per component, according to a specific set of factors. Volume C: Delineation of Resource Units (RUs) o Resource Units are delineated for rivers and groundwater. The Mzimvubu estuary is discussed as a single RU. Wetlands are defined as wetland groups. Volume D: Delineation of Integrated Units of Analysis (IUAs) and associated status quo of each IUA VOLUME A: A BROAD STATUS QUO DESCRIPTION OF THE STUDY AREA Water Resources The Mzimvubu catchment was divided into six water resource zones based on similar water resource operation, location of significant water resource infrastructure (including proposed infrastructure) and distinctive functions of the catchments in context of the larger system. Groundwater use is included in this description. The significant resources of the proposed water resource zones are summarised below. Catchments Water resource zone Major impoundments Quaternary catchments Upper Mzimvubu M-1 None T31A – T31H Mzintlava M-2 None T32A – T32H Kinira M-3 None T33A – T33K Thina M-4 None T34A – T34K Tsitsa M-5 None T35A – T35M Lower Mzimvubu M-6 None T36A & T36B Economic analysis The economic analysis consists of the status quo of the current economic activities as well as the situational analysis of the current prevailing social economic position in the Mzimvubu catchment (T3), concerning the large water users such as irrigation agriculture, commercial forestry, sawmills, laminated board factory as well as the other dependents. Although the tourism sector is neither an indirect nor a large water user, it is often included in the analyses as the value of water to the sector in its natural environment lies in the attraction that the water and environment has for the tourist, which affects the sustainability of the industry. However, in this catchment it is so small that no acceptable values could be sourced and it was therefore not included. The economic development in the catchment is rather skewed. The main commercial activities are currently restricted to the following sub-catchments: . T31: The main stream of the Upper Mzimvubu has a very large commercial farming area, small commercial forestry and the two towns of Matatiele and Cedarville. The north-eastern Determination of Water Resource Classes and Resource Quality Objectives for the Water Resources in the Mzimvubu Catchment Project No. WP 11004 / Status Quo and (RU and IUA) Delineation Report Page v part of the quaternary catchment is located within the KwaZulu-Natal province and the rest in the Eastern Cape. T32: The Mzintlava River with Kokstad as the commercial hub has a large commercial-based farming community. The eastern parts of T35 accommodate over 45 000 hectares of commercial forestry with the towns of Maclear and Ugie. In some of the afforestation areas commercial farming is still active. In the lower parts of the Tsitsa River are the identified sites of the proposed Ntabelanga and Lalini dams together with the planned irrigation and hydro-power generation to be established in the sub-catchment. The rest of the catchment is rural with subsistence farming and a number of towns and villages acting as commercial, education and health service centres. Water quality overview Water quality in this WMA is generally good, with little contamination by nutrients and other toxins, probably due to the dispersed nature of the settlements and their sheer size, and very little industry. There are localised problems related to urban settlements. The most serious form of pollution or water quality impacts in the catchment are high turbidities due to soil erosion. This has reached very serious proportions in the rivers on the eastern side. The cause of this is primarily oversettlement and poor agricultural and overgrazing practices, that are exacerbated by the steep catchments and severe storms that occur. The high silt loads are