EWS Planning of Water and Sanitation 13/02/2015 . Strategic Objectives . Legislation driving the business plan . Time horizon – Long term, medium term and short term plan – in terms in terms of legislated submission cycle . Beyond Urban Edge . Backlogs . Drought Strategic Objectives . Customer Perspective: Deliver quality and affordable services to our customers and customers take good care of the infrastructure. Financial Perspective: Achieve financial sustainability (sustainable tariffs, controlling costs, increased allocation of grants, etc.). Process Perspective: . Deliver fast, efficient, and effective service delivery (effective performance, removing constraints and bottlenecks, and improving efficiency). Ensure compliance to legislation and relevant governance prescripts (SCM, Environmental legislation, Health & Safety, etc.). Identify and effectively manage exposure to all risks. Achieve an unqualified audit. Organisational Capacity Perspective: . Ensure availability of adequate and appropriately skilled workforce. Sound (condition) and adequate (capacity) infrastructure to support current and future demand for water and sanitation services. Collaborate with relevant stakeholders to increase water resources sustainability. Legislations & Policies Driving the Business Plan . National Water Services Act . Water Supply Bylaws . Blue Drop certification requirements . Green Drop certification requirements . No Drop certification requirements . Environmental policies and Acts . Water Services Development Plan (WSDP) . Policies and Practices of the eThekwini Municipality Water and Sanitation Unit . OHSA . NDP, Provisional plan , IDP Master Plan – Time Horizon . Long term – 25 year – in line with city’s vision . Medium term – 10 year – in line with IDP . Short term – 3 year – In line with SDBIP . Special projects SMITHSFIELD DAM TONGAAT HeadingText DESALINATION REMIX WATER DESALINATION RESOURCE PROJECTS ILLOVU LOWER DESALINATION MKHOMAZI NORTHERN WESTERN AQUEDUCT AQUEDUCT WIGGINS LOWER UMKHOMAZI TONGAAT WWTW HILLCREST WWTW UMHLOTI WWTW UMHLATUZANA WWTW HAMMARSDALE WWTW UMKOMAAS WWTW Long Term Projects . This is to ensure bulk water supply system is in place for next 25 years. Bulk supply is planned in conjunction with Umgeni and DWS to ensure our bulk system is supported by their infrastructure. As EWS buys its potable bulk water supply from Umgeni, which further relies on DWS bulks (dams). Discussed at KZN reconciliation strategy steering committee. EWS Major projects are: . Western aqueducts – supplies Western and Part of Northern areas . Northern Aqueduct- Supplies Northern region . Certain reservoirs – All Regions within EWS boundaries . Upgrade of treatment plants (water & Waste water)– Different Regions . Trunk Sewers – all regions . Regional Waste Water treatment plants – All Regions . WSDP is draft document- work in progress WSDP Water Services Development Plan covers the topics below thus gives an overview of the current and future plan for water services: . Background to eThekwini . Status Quo of Water Services Infrastructure and Delivery . Priority Pillars . Innovations . Context within which Water Services planned is being developed . Water Services Planning . Finance . Reporting . Into the Future KZN Reconciliation Strategy Strategy: . To meet legitimate current and future water requirements. Objectives: . To recommend the most suitable interventions to balance water requirements and water resources . To identify responsible institutions and provide target dates for implementation of the strategy. (Reuse 2019, uMWP1 2029) 800 750 Reduced support to South Coast due to augmentation (Ngwadini Dam or Desalination) 700 650 uMWP1 Water requirement projection (Smithfield Dam) 600 scenario - July 2014 550 500 Actual historic water use 450 Re-use of Treated Effluent 400 Spring Grove Dam 350 Volume (million m³/a) (million Volume 300 250 Existing total integrated 200 Mgeni WSS (including Growth in Darvill 150 Return Flows) 100 50 0 2020 2004 2006 2008 2010 2012 2014 2016 2018 2022 2024 2026 2028 2030 2032 2034 2036 2038 2040 Umkhomazi Project Umkhomazi Water Demand Projections Demand Forecast for Western and Northern Areas . Current demand from Pt M(western region) is 90Ml/day. Current demand for Inanda and Ntuzuma areas i.e. from NR2 reservoir is 70Ml/day . Current demand for Pinetown south(Tshelimnyama, Westmead, Dassenhoek, Kwadengezi) is 30ML/day . Current demand for Jerome drive, Wyebank, Berkshire Down is 10Ml/day . All the above are planned to be supplied from the Western aqueduct. i.e. 200Ml/day . Umgeni has indicated that they can supply 210 Ml/day at Pt M . Current demand for Umbumbulu is 10Ml/day which is taken off the 210Ml/day. Therefore supply and demand will be balanced. By supplying the above areas from western aqueduct , Durban heights will have spare capacity available to supply further north. Although existing northern aqueduct is running at its full capacity, thus only 70Ml/day could be further transported via this aqueduct. This 70ML/day could be made available to supply development in the north like Cornubia and Dube trade port via new northern aqueduct upgrade. The extra 45ml/day will provide flexibility within our system. It could be either supplied to the southern aqueduct or to the western region and cater for increase in demand in the INK area. Umkhomazi project needs to be fast tracked and needs to be operational by 2023 else there will be water shortages. This has been highlighted a long time ago. DWA needs to build Smithfield and Baynesfield dam and increase the available supply at Pt M i.e. by Umlaas Rd. WA and NA upgrade will improve the supply in the north and west region for next 3 to 5 years but would not cater for future demands in these region. To cater for future demands Smithfield and Baynesfield dam and associated treatment plant needs to be fast tracked. Pumping to Hazelmere dam part of the flow from Tongaat and Mdloti WWTW is limited Soluble reactive phosphorous Total dissolved solids Option 1: Combine flows & indirect reuse to Hazelmere 18 Option 2: Combine flows & build sea outfall 19 Tongaat WTW Design = 23 Ml/day Current = 14 Ml/day River Blend in furrow and abstracted at WTW Feasibility study approved < R200 000 Tongaat WWTW Design – 12,5 Ml/day Current – 7,8 Ml/day Option 3: Indirect reuse at Tongaat WTW 20 Nungwane Dam Amanzimtoti WWTW Design = 30Ml/day Current = 22Ml/day Kingsburgh WWTW Design = 7.8Ml/day Current = 4Ml/day Option 1: Amanzimtoti WWTW to Kingsburgh WWTW to Nungwane Dam 21 Amanzimtoti WWTW Toti WTW Design = 25 Ml/day Current = 7 Ml/day Kingsburgh WWTW Option 2: Toti WWTW to Kingsburgh WWTW to Toti WTW 22 Option A: Pump from 2 WWTW to Nungwane Option B: Pump from 2 WWTW to Toti WTW Volume = 9 Ml/day (1 in 100yr yield) Blend ratio 50: 50 Cost Reduced 23 Potable water reclamation KwaMashu WWTW from KwaMashu is Design = 65 Ml/day Current = 52 Ml/day discharged into the existing trunk main of the NA in the vicinity of Duffs Road. Potable water reclamation from Northern WWTW Northern is discharged Design = 70 Ml/day to the NA at Newlands Current = 59 Ml/day east. KwaMashu WWTW & Northern WWTW to existing Northern Aqueduct (NA)24 Water re-use projects are complex and sophisticated, require high level of competence and skill. Capable implementation agency will require: . Technical expertise . Planning ability . Project management capability . Financial strength . Trusted water services delivery . Accepted by community and customers . Compliance of existing WWTWs to achieve strict discharge standards is critical to the future success of water re-use. Strict enforcement of discharge standards; . Addressing the management and performance failures of wastewater treatment plans. Water re-use has good potential to solve local water shortage problems . Water re-use gives best quantitative benefit in coastal applications (uses water that would have discharged into the sea) 25 Western Aqueduct Phase 2 Western Aqueduct Construction Status . Sector 1 : Contract awarded, Completed & handed over to EWS . Sector 2 : Contract awarded, Completed & handed over to EWS . Sector 3 : Contract awarded, Completion end 2017 . Sector 5 : Contract awarded, Completion end 2017 . Sector 4 : Under construction – end 2016 . Sector 6 : On hold – EWS need to make a decision on implementation date . Ashley Drive BPT : Contract awarded, Completed . Wyebank BPT : Under construction – completion end 2017 PROPOSED NAA: PROJECT PROGRAMME CHALLENGES: 1. THE CURRENT DAILY SHORTFALL IN THE UMZIMNYATHI, SENZOKUHLE AND OGUNJINI AREAS. 2. PIPE PROCUREMENT LENGTHY LEAD TIME SOLUTIONS: 1. CONSTRUCT THE LEGS OF THE PROPOSED NAA FROM P4, P2, BLACKBURN AND UMHLANGA RESERVOIRS BY 2013 – ALL CURRENTLY UNDER CONSTRUCTION – TO BE COMPLETED END OF 2016. TO UTILISE THE EXISTING SPARE CAPACITY AT P4 & P2 RESERVOIRS AS A TEMPORARY SOLUTION UNTIL THE FULL COMMISSIONING OF THE NAA BY END 2016. 2. CONSTRUCT THE LEGS FROM NR5, SENZOKUHLE AND OGUNJINI INCLUDING THE UPPER UKUMANANZA RESERVOIR & P/S BY THE COMMISSIONING OF THE W/A PH.2 END 2018. NEED TO GO OUT FOR PROFESSIONAL SERVICES CONTRACT 3. ORDER PIPE IMMEDIATELY ONCE THE PROJECT GO-AHEAD HAS BEEN GIVEN. RESULTS OF HYDRAULIC MODELLING Pipeline diameter (mm): Flow rate (Ml/d): Velocity (m/s): Wyebank to KwaDabeka: DN1400 338 2.6 KwaDabeka to Emachobeni: DN1400 320 2.4 Emachobeni to Lindelani BPT: DN1200 203 2.1 Lindelani BPT to NR7: DN1400 203 1.5 NR7 to Phoenix 4: DN1200 182 1.9 Phoenix 4 to Phoenix 2: DN1200 161 1.7 Phoenix 2 to Blackburn: DN1000 97 1.5 Blackburn to Umhlanga: DN700 20.2 0.6 Blackburn offtake to Waterloo: DN600 23.8 1.1 Waterloo to La Mercy: DN500 15 1.0 Waterloo to Nyaninga: DN500 23.8 2.2 Emachobeni to NR5: DN1000 120 1.8 NR5 to Senzokuhle: DN600 18 0.8 Senzokuhle to Ogunjini: DN300 6 1.3 RESERVOIR: ULTIMATE DEMAND (Ml/d): ACTUAL FLOWS (Ml/d): SHORTFALL (Ml/d): Umhlanga 2 High Level: 23.39 12.23 -11.16 Umhlanga 1: 22.11 16.00 -6.11 Umhlanga 1 High Level: 11.53 0.00 -11.53 KwaMashu 2: 36.88 35.08 -1.80 La Mercy Airport: 15.00 4.63 -10.37 NR7: 32.50 21.58 -10.92 TOTALS 141.41 89.52 -51.89 Greater Umhlanga Extent Greater Umhlanga Demands Medium term plan to reticulate these areas to support development and link to bulk infrastructure .