BriefingPRESENTATION the Department of TITLE Water and Sanitation’s Gauteng District ImplementationPresented by: Plan Name Surname Directorate Presented Dateby: Mr. Trevor Balzer Acting Director-General 28 August 2020 Contents • Purpose………...…………………..…………………...…………………...….……..3 • Part 1: Situational analysis………………………………………………………4-23 • Part 2: Overview of the Gauteng 2020/21 district implementation plan targets.……………………………………………………………………………24-73 – City of Ekurhuleni – City of Johannesburg – City of Tshwane – Sedibeng District Municipality – West Rand District Municipality 2 Purpose To brief the Portfolio Committee on the Department of Water and Sanitation’s Gauteng District Implementation plan for 2020/21 3 PART 1: SITUATIONAL ANALYSIS OF THE PROVINCE 4 Provincial overview GAUTENG GAUTENG CONTRIBUTES HAS A TOTAL OF 34,8 % 64 TOWNS & CITIES TO THE GROSS DOMESTIC PRODUCT Gauteng Mega Infrastructure Projects 9 PERENNIAL • Central Development Corridor - COJ RIVERS • Eastern Development Corridor – City of Ekurhuleni • Northern Development Corridor - COT 5% • Western Corridor – West Rand District OF THE TOWNS RELY • Southern Corridor – Sedibeng District ON GROUNDWATER 95% OF THE TOWNS & CITIES RELY ON SURFACE WATER MOST TOWNS & CITIES RELY ON A MIXURE OF BOTH 5 Provincial Population 6 South Africa’s Water Resource Scarcity (average annual rainfall & water resource situation) Rainfall is relatively higher in the northern and eastern parts of Southern Africa (viz. DRC, Zambia and Mozambique) The drier parts of the region include Namibia, Botswana and South Africa Hence, water availability is spatially skewed (in terms of areal distribution) Evaporation rates exceed precipitation mainly due to high temperature Southern Africa only has 12.25% of the total water in Africa (i.e. highly arid region) Key message: RSA is relatively water scarce under natural conditions even before factoring human induced impacts into the equation South Africa’s water resources Surface Water Potential Ground Water Potential Total Runoff = 49 billion m3/year (<50% of Zambezi river) Total potential = 19 billion m3/year Reliable yield for use = 10,2 billion m3/year (27% of runoff) Utilizable potential = 5 billion m3/year Remaining development potential = 5,4 billion m3/yr Economical use is less due to size & location Potential re-use of return flows = 1.9 billion m3/yr Current est use = 2-3 billion m3/year Water is not always located near uses 8 Current water resources Water use per source typemix at 98% assurance level Desalination <1% Ground water 9% Return flows 14% Surfarce resources 77% The proposed strategy is to increase the use of currently under- utilized water sources such as groundwater, water reuse, desalination of saline water, rainwater and fog harvesting STORAGE PER PROVINCE % Storage per Province ACTUAL VOLUMES WATER STORAGE PER PROVINCE Northen Cape Lesotho Swaziland Western Cape 0% Province Storage North West 7% 1% 6% Eastern Cape 3% Western Cape 1,865.7 Mpumalanga 6% Northen Cape 147.3 8% Limpopo North West 867.6 5% Mpumalanga 2,538.6 Limpopo 1,522.0 KZN 4,784.0 Gauteng 128.1 KZN Free State 15,653.0 15% Eastern Cape 1,809.6 Gauteng Lesotho 2,362.6 Free State 0% Swaziland 333.8 49% Total 32,012.3 Western Cape Northen Cape North West Mpumalanga Limpopo KZN Gauteng Free State Eastern Cape Lesotho Swaziland 10 Bulk Supply System . The GCR is geographically located on a high plateau far from large rivers . The top of the plateau (Parktown ridge) represents a watershed: . Water that falls to the south of the ridge drains to the Atlantic Ocean (via the Vaal and Orange Rivers) . Water that falls to the north of the ridge drains to the Indian Ocean (via the Crocodile and Limpopo Rivers) Bulk Supply System . Due to the watershed, the GCR extracts from and impacts on a number of water management areas Bulk Supply System . 83% of the GCR’s water is supplied by a complex system of transfers through the Integrated Vaal River System (IVRS) Mohale Dam 22km2 Total Storage Capacity (Lesotho) 0.94 billion m3 . Rand Water extraction points for purification and distribution to municipalities . Extraction limit has been reached until LHP2 is completed – est 2026 WATER SERVICES AREAS- GAUTENG PROVINCIAL 14 FOCUS AREA Projected Growth in Yield and Demand For IVRS for GP and Surrounding Deficit (-) Deficit (-) /Surplus /Surplus (+); 40 (+); 34 Demands Demands (estimated (estimated Availability(integ Availability(integra requirements); 3 requirements); 3 rated system ted system yield)/ 120 600 yield)/ scheme scheme yield; 3 yield ; 3 154 640 2019 2040 • GP shows a deficit in GP Groundwater terms of groundwater availability – Although some studies shows that the dolomitic aquifers in Unabstracted the GP area have (m3/a); -59 757 209 potential groundwater, Available the challenge is the risk (GRA2)(m3/a); 123 658 583 of subsidence which may occurs should over- exploitation in these areas occur. • At a local scale (low risk Abstracted areas) investigations on (WARMS)(m3/a); groundwater 183 415 792 development on availability may be successful 17 Reconciling Water Requirements & Availability • DWS undertakes scenario planning to ensure water security for the country • Key outputs of the scenario planning are strategies to reconcile water requirements and availability for all large integrated systems in the country as well for localised water resource systems that secure water for small towns, villages or clusters of settlements. • Due to the dynamic nature of a water balance for a system, reconciliation strategies must be continuously reviewed and updated in a participatory manner. Strategy Steering Committees involving stakeholders/roleplayers/ interested and affected parties are formed to oversee this task. • Reconciliation strategies feeds water security perspectives into national, provincial and local planning instruments such as the NDP, NWRS, PGDS, WSDPs and etc. • Reconciliation Strategies thus underpins water and sanitation master planning in SA including the Water Sector Infrastructure Investment Framework which is critical for economic revival and growth. 18 Reconciliation Strategy for the Integrated Vaal River System Water Description of the system and its Strategic Interventions to keep the system in Resource (WR) supply area balance for a period of at least 25 years System Integrated Vaal • Consists of 14 interlinked dams • Eradicate unlawful irrigation, notably in the River System including Vaal, Bloemhof, upper Vaal river area Sterkfontein, Grootdraai, Katse, • Implement Water Conservation/Water and Mohale Dams Demand Management with focus on loss • Supplies water to: 60% of management (15% must be saved) economy, 45% of population, • Treat and use effluent, starting with Mines and industries on Eastern desalination of acid mine water drainage Mpumalanga Highveld, Bulk of • Implement the next water supply Eskom’s coal fired power stations, augmentation scheme (Phase 2 of the Sasol’s coal to liquids plants, Lesotho Highlands Water Project) Gauteng, North West and Free State goldfields, Kimberley, Large irrigation schemes, • System in currently in deficit due and needs augmentation 19 Water Balance (October 2019) Re-use (56 million Desalination for urban use High with target WC/WDM Unlawful removed m3/a in COT (from January 2022) alone) • High water requirement High water requirement 3800 Target Scenario • Unlawful removed • High water requirement • Unlawful removed Earliest Date for Yield 3600 • WC/WDM savings /a) Replacement (2030) 3 • Re-use 3400 Short term availability due to favourable reservoir volumes 3200 System Yield TWP 3000 Polihali Dam Yield Yield increases due to 2800 Polihali Dam Net Yield desalination of mine water • Elevated risk of restrictions. (*recalibrate model) 1600 Project Water Rand 2600 • Violation of risk criteria. Water Requirements (million m (million Requirements Water 2400 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050 Elevated risks without WC/WDM savings First transfer from LHWP Phase II – Dec 20 2025 State of Dams in Gauteng Dam River Place Full Suppy % % % Last Capacity 2020/ Last year (million m3) 08/24 Week Bon Accord Apies North of Pretoria 4.4 104.8 104.8 101.8 Bronkhorstspruit Bronkhor East of st Spruit Pretoria 57.0 94.6 94.9 82.9 Rietvlei Hennops Centurion 12.3 99.8 99.8 100.9 Roodeplaat Pienaars North-East of Pretoria 41.2 100.2 100.2 96.5 TOTAL 114.8 99.8 99.9 95.5 21 State of the Vaal River System (14 Dams) Dam River Full Supply Capacity % 2020/08/24 % Last Week % Last (million m3) year Bloemhof Vaal 1240.3 96.5 98.2 96.7 Grootdraai Vaal 349.6 79.4 79.9 62.9 Heyshope Assegaai 445.0 73.1 73.5 81.4 Jericho Mpama 59.3 76.8 77.3 62.1 Katse Malibamatso 1519.2 27.7 28.7 18.2 Mohale Senqunyane 857.2 6.2 6.7 33.1 Morgendstond Ngwempisi 100.0 45.5 45.6 42.9 Nooitgedacht Komati 78.4 85.9 86.1 84.5 Sterkfontein Nuwejaarspruit 2617.0 93.9 93.9 92.2 Vaal Vaal 2603.5 38.8 39.6 61.3 Vygeboom Komati 78.1 89.8 90.9 94.9 Westoe Usutu 60.1 32.7 34.3 64.9 Woodstock Tugela 373.3 84.0 94.6 91.6 Zaaihoek Slang 187.7 60.9 62.4 68.5 TOTAL 10 564.9 63.6 65.1 68.2 22 Water demand and loss trend 1 800 100% 1 600 15% Water restrictions 12 Aug 2016 to 13 March 2017 90% 80% 1 400 70% 1 200 60% 1 000 50% revenue Water revenue 800 38,3% - 36,6% 36,2% 36,5% 34,0% 35,7% 35,9% 34,9% 34,5% 35,7% 35,8% 40% 600 Non% 26,0% 24,1% 30% 400 20% System Input Volume (millionm³/annum) Input Volume System Original Target Target 200 10% date - 0% Jun-07 Jun-08 Jun-09 Jun-10 Jun-11 Jun-12 Jun-13 Jun-14 Jun-15 Jun-16 Jun-17 Jun-18 Jun-22 Non-Revenue water