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Western Cape Reconciliation Strategy Study

Western Cape Reconciliation Strategy Study. WCWSS. The Western Cape Water Supply System. Serves more than 3 million people Supply to Cape Town and some West Coast, Boland, Swartland and Overberg towns Irrigation In the Berg, Eerste and Riviersonderend rivers

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Western Cape Reconciliation Strategy Study

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  1. Western Cape Reconciliation Strategy Study

  2. WCWSS

  3. The Western Cape Water Supply System • Serves more than 3 million people • Supply to Cape Town and some West Coast, Boland, Swartland and Overberg towns • Irrigation • In the Berg, Eerste and Riviersonderend rivers • Production of 50% of SA’s irrigated agricultural export • High economic growth and migration into the system area • Infrastructure owned by the DWAF, City of Cape Town (CCT) & Eskom • Berg Water Project under construction near Franschhoek

  4. WCWSS characteristics • 90% runoff in Winter (May to Oct) • 70% requirements in summer (Nov to Apr) • 50% of system dams’ storage needed to store winter water for usage in summer • 50% of system dams’ storage provides carry-over storage for drought periods • Dams are operated to minimise spillage • Droughts are managed by progressively restricting supplies

  5. PURPOSE OF THE RECONCILIATION STRATEGY • To update and review water requirements and interventions to meet requirements • To engage stakeholders and the general public • To develop toolkits to assist with the future reconciliation of supply and requirement • To provide a guide for decision-making towards effective reconciliation of supply and requirement • To recommend preparatory measures, actions and assign responsibilities

  6. Management of Study National Water Resource Planning Study Management Steering Committee • DWAF HO • DWAF RO • CCT • Saldanha Mun. • Provincial Dept. of Agric • Province Professional Service Provider Public participation RECONCILIATION STRATEGY STUDY Selected Stakeholder input

  7. Institutional Planning Process Provincial Integrated Development Plan Berg Catchment Management Strategy CCT’s Integrated Development Plan (IDP) Other WSDPs CCT WSDP CCT WC/WDM Strategy Reconciliation Strategy

  8. NEWSLETTER 1 PUBLIC MEETING To identify and provide feedback on interventions PUBLIC PROCESS FOLLOWED August 2005: Screening of Interventions Workshop NEWSLETTER 2 PUBLIC MEETING To provide feedback on interventions for comment Refine reconciliation scenarios and strategy content through stakeholder workshops and technical focus groups Input from the Berg and Breede-Overberg CMA Reference Groups NEWSLETTER 3 Summary of strategy to public for comment Input from the Berg and Breede-Overberg CMA Reference Groups Determine and analyse a range of implementation scenarios DWAF WRFMC CCT Portfolio Committee CCT Mayco and Council Berg CMA Reference Group NEWSLETTER 4 Obtain public feedback on scenarios through press release and newspaper advert PUBLIC MEETING To present the Reconciliation Strategy and selected interventions for further study Strategy Steering Committee to consider comments

  9. STRATEGY THEMES Water Requirements Water Use Efficiency Implementation and Performance monitoring Water Availability Monitoring and Information Management Strategy Comparison of supply and requirement Stakeholder Engagement Selection of interventions Protection and Management

  10. Structure of Study Key Reports • Reconciliation Strategy • 9 Themes each containing • Key issues • Objectives • Approach • Action • Responsibility • Programme Determination of Future Water Requirements Scenario Planning for Reconciliation of Supply and Requirement Supporting Reports WC/WDM Treated Effluent use

  11. Options/ Interventions Identified CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated Effluent use Desalination

  12. Pressure Reduction • Leak Detection and Repair • Meter management and replacement • Consumer awareness • School Education • Plumbing retro-fit prg • Support for large consumers • Re-use: Parks and Industry • Management Information System • Upgrade telemetry system CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated effluent use Desalination

  13. Tariffs, metering and credit control • Eliminate AFUs • Promotion of private boreholes & wells • Leak detection • Water Efficient Fittings • User Education CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated Effluent use Desalination

  14. Newlands Aquifer • Cape Flats Aquifer • West Coast Aquifers • TMG Aquifer CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated Effluent use Desalination

  15. Voëlvlei Phase 1 • Michell’s Pass Diversion • 24 Rivers Dam • Upper Wit River Diversion • Raise Steenbras Lower Dam • Upper Molenaars CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated Effluent use Desalination

  16. Treated Effluent use Irrig./ind • Dual Reticulation • Commercial Irrig. Exchange • Treated Effluent use to Potable standards • Berg River Exchange CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated Effluent use Desalination

  17. CCT Pilot Plant • Desalination Plant CCT 8-yr WC/WDM Strategy Additional Longer-term WC/WDM Groundwater Interventions Surface Water Interventions Treated Effluent use Desalination

  18. Scenario Planning The objective of the Scenario Planning Process is to identify, evaluate and assess alternative groupings and phasing of interventions so as to determine the potential impacts and benefits of possible combinations of interventions to reconcile water supply and requirement in the WCWSS, up to 2030.

  19. SCENARIO 1 SCENARIO 2 SCENARIO 3 NO WC/WDM CCT WC/WDM strategy implemented CCT WC/WDM strategy implemented & additional WC/WDM interventions ILLUSTRATES IMPACT OF WC/WDM ON TIMING OF IMPLEMENTATION OF SUPPLY INTERVENTIONS

  20. SCENARIO 7 SCENARIO 8 SCENARIO 9 CCT WC/WDM strategy & Lowest URV Interventions CCT WC/WDM strategy, Lowest URV Interventions & Ecological Reserve CCT WC/WDM strategy, Lowest URV Interventions & Possible Climate Change ILLUSTRATES IMPACT OF LOWEST URV SELECTION AS WELL AS IMPACT OF IMPLEMENTING ECOLOGICAL RESERVE AND POTENTIAL IMPACT OF CLIMATE CHANGE

  21. SCENARIO 10(A) SCENARIO 10(B) SCENARIO 10(C) CCT WC/WDM strategy & conservative Selection of Interventions CCT WC/WDM strategy, conservative Selection of Interventions, Ecological Reserve & Climate Change All WC/WDM interventions, conservative Selection of Interventions, Ecological Reserve & Climate Change ”CONSERVATIVE SELECTION” AND IMPACT OF IMPLEMENTING ECOLOGICAL RESERVE AND POTENTIAL IMPACT OF CLIMATE CHANGE

  22. Scenario 10 (a) to (c)“Conservative Selection” Reasons for omitting specific interventions: • Additional longer-term WC/WDM interventions • Equates to approx 50% of the modelled potential WC/WDM saving • Uncertainties regarding actual savings achievable • Newlands Aquifer • Small yield • Potential impact on river flow and existing users • Cape Flats Aquifer • Perceived O&M concerns of sustainability of operating wellfield in a relatively high density area • Upper Wit River Diversion • Potential difficulties in obtaining environmental approvals

  23. SCENARIO 11 Low Water Requirement Curve CCT WC/WDM strategy & intervention selection based on URV ILLUSTRATES IMPACT OF LOW WATER REQUIRMENT CURVE

  24. CONCLUSIONS • Successful implementation of CCT’s WC/WDM 8-year strategy and programme is essential • Additional longer-term WC/WDM interventions just as important • Groundwater options very important – especially TMG • Treated effluent use has massive potential. Treated effluent for potable use may be required as early as 2020 • Desalination of seawater as long term “back-up” • Feasibility studies should commence on both demand and supply interventions to ensure reconciliation of supply and requirement • A Strategy Committee should be formed to ensure implementation of the strategy

  25. Strategy Committee A Strategy Committee should be established with the following objectives: • To ensure that the strategy is relevant and updated, • To monitor and co-ordinate the implementation of the relevant actions identified in the strategy, and • To make recommendations on long-term planning activities required to ensure reconciliation of requirement and available supply in the WCWSS area A support group should be established to provide administrative scientific and technical support to the Strategy Committee

  26. Representation on Strategy Steering Committee 23 REPRESENTATIVES

  27. RECOMMENDATIONS It is recommended that: • A Strategy Steering Committee be formed to oversee the implementation of the Strategy • The CCT and other WSAs should implement their WC/WDM strategies and programmes • The CCT and other WSAs should develop integrated policies on treated effluent use and determine the full future potential for treated effluent use • The CCT should continue with the TMG Feasibility Study and Pilot Project and the Desalination Pilot Plant as these could be significant future water resources • The DWAF and the CCT should initiate studies on a number of interventions to ensure the reconciliation of supply and requirement

  28. Thank you ANY QUESTIONS

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