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Infrastructure Master Plan 2019 2019/2020 – 2049/2050 Volume 2: Mgeni System Infrastructure Development Division, Umgeni Water 310 Burger Street, Pietermaritzburg, 3201, Republic of South Africa P.O. Box 9, Pietermaritzburg, 3200, Republic of South Africa Tel: +27 (33) 341 1111 / Fax +27 (33) 341 1167 / Toll free: 0800 331 820 Email: [email protected] / Web: www.umgeni.co.za For further information, please contact: Planning Services Infrastructure Development Division Umgeni Water P.O.Box 9, Pietermaritzburg, 3200 KwaZulu‐Natal, South Africa Tel: 033 341‐1522 Fax: 033 341‐1218 Email: [email protected] Web: www.umgeni.co.za UMGENI WATER INFRASTRUCTURE MASTER PLAN 2019 2019/ 2020 – 2049/ 20 50 M AY 2019 PREFACE This Infrastructure Master Plan 2019 describes Umgeni Water’s infrastructure plans for the financial period 2019/2020 – 2049/2050. It is a comprehensive technical report that provides detailed information on the organisation’s current infrastructure and on its future infrastructure development plans. This report replaces the last comprehensive Infrastructure Master Plan that was compiled in 2018. The report is divided into seven volumes summarised in Table i and shown schematically in Figure i. Table i Umgeni Water Infrastructure Master Plan 2019/2020 volumes. Focus Area Purpose Volume 1 describes the most recent changes and trends within the primary environmental dictates that influence Umgeni Water’s infrastructure development plans (Section 2). Section 3 provides a review of historic water sales against past projections, as well as Umgeni Water’s most recent water demand projections, compiled at the end of 2017. Section 4 describes Water Demand Management initiatives that are being undertaken by the utility and Section 5 contains a high level review of the energy consumption used to produce the water volumes analysed in Section 3. Section 6 focuses on research into the impacts of climate change and alternative supply options including waste water reuse and desalination. Section 7 provides an overview of the water resource regions and systems supplied within these regions in Umgeni Water’s operational area. Volume 2 describes the current water resource situation and the water supply infrastructure in the Mgeni System (Section 8; shown in orange in the adjacent figure). Included is the status quo with regards supply to the area as well as recommendations on the development of infrastructure to meet future needs. i Focus Area Purpose Volume 3 summarises the uMkhomazi System (Section 9; illustrated in purple in the adjacent figure) current water resource situation and water supply infrastructure, the status quo on supply to the area and provides recommendations on the development of infrastructure to meet future needs. Volume 4 reports on the South Coast System (Section 10; shown in red in the adjacent figure) with regards to the current water resource situation and water supply infrastructure, the status quo on supply to the area and provides recommendations on the development of infrastructure meet future needs. ii Focus Area Purpose Volume 5 provides a description of the North Coast System (Section 11; illustrated in green in the adjacent figure) water resource situation and water supply infrastructure, the status quo on supply to the area and recommendations on the development of infrastructure meet future needs. Volume 6 summarises the Upper uThukela System (Section 12; illustrated in pink in the adjacent figure) the current water resource situation and water supply infrastructure, the status quo on supply to the area and provides recommendations on the development of infrastructure to meet future needs. iii Focus Area Purpose Volume 7 describes the wastewater works currently operated by Umgeni Water (shown in pale brown in the adjacent figure) and provides plans for development of additional waste water treatment facilities. iv Figure i Umgeni Water Infrastructure Master Plan 2019/2020 report structure. v It is important to note that information presented in this report is in a summarised form and it is recommended that the reader refer to the relevant planning reports if more detail is sought. Since the primary focus of this Infrastructure Master Plan is on Umgeni Water’s existing bulk infrastructure supply network, the water resource infrastructure development plans are not discussed at length. The Department of Water and Sanitation (DWS), as the responsible authority, has undertaken the regional water resource development investigations within Umgeni Water’s area of operation. All of these investigations have been conducted in close collaboration with Umgeni Water and other major stakeholders in order to ensure that integrated planning occurs. Details on these projects can be obtained directly from DWS, Directorate: Options Analysis (East). The Infrastructure Master Plan is a dynamic and evolving document. Outputs from current planning studies, and comments received on this document will therefore be taken into account in the preparation of the next update. vi TABLE OF CONTENTS Preface ................................................................................................................................................... i Table of Contents ................................................................................................................................... i List of Figures ..................................................................................................................................... viii List of Tables ........................................................................................................................................ xi List of Acronyms ................................................................................................................................. xiii List of Units ........................................................................................................................................ xvi 8. Mgeni System .............................................................................................................................. 1 8.1 Synopsis of Mgeni System .................................................................................................. 1 8.2 Water Resources of the Mgeni System............................................................................... 8 8.2.1 Description of the Mgeni System Water Resource Regions ....................................... 8 8.2.2 Reserve .................................................................................................................. 29 8.2.3 Existing Infrastructure and Yields ........................................................................... 30 8.2.4 Operating Rules ..................................................................................................... 39 8.3 Supply Systems ................................................................................................................ 42 8.3.1 Description of the Mgeni System ........................................................................... 42 8.3.2 Status Quo and Limitations of the Mgeni System ................................................... 82 8.4 Water Balance/Availability ............................................................................................... 99 8.5 Recommendations for the Mgeni System....................................................................... 100 8.5.1 System Components ............................................................................................ 100 8.5.2 Projects................................................................................................................ 113 8.6 Management and Operation of uMgungundlovu Water Treatment Plants (WTPs) ......... 145 8.6.1 Appelsbosch WTP ................................................................................................ 147 8.6.2 Lidgetton WTP ..................................................................................................... 150 8.6.3 Mpofana WTP ...................................................................................................... 156 8.6.4 Rosetta WTP ........................................................................................................ 161 References ........................................................................................................................................ 164 Acknowledgements ................................................................................................................................I vii LIST OF FIGURES Figure i Umgeni Water Infrastructure Master Plan 2019/2020 report structure. ............................... v Figure 8.1 General layout of the Mgeni System. ................................................................................... 2 Figure 8.2 Network chart of the Mgeni System. .................................................................................... 3 Figure 8.3 General layout of the Upper Mgeni System. ......................................................................... 4 Figure 8.4 Schematic of the Upper Mgeni System................................................................................. 5 Figure 8.5 General layout of the Lower Mgeni System. ......................................................................... 6 Figure 8.6 Schematic of the Lower Mgeni System. ................................................................................ 7 Figure 8.7 General layout of the Mooi/Mgeni Region
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