Non-Revenue Water Pre-Feasibility Assessment Tool

Transcription

1 Non-Revenue Water Pre-Feasibility Assessment Tool MBI Water Services Master Class # For Municipalities, By Municipalities, Benefitting Municipalities and their Communities

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3 Background SA 30 th driest country in the world NRW: ~39% Consumption: ~223 L/capita/day Although NRW projects could have shortpayback periods (3 4 years) often significant barriers

4 NRW Project Barriers 1. Municipal capacity to develop bankable project proposals to access off-budget funding for NRW projects, and a lack of onbudget funds 2. Awareness of the potential for NRW projects and their impact on municipal revenue 3. Lack of political will to prioritise NRW projects or their feasibility studies 4. Compliance and enforcement capabilities of authorities tasked to reduce water losses GreenCape project: NRW Pre-Feasibility Tool

5 Methodology Literature review NRW and financial related models Develop draft tool Tool quality assurance Seasoned WCDM practitioners Internal tool testing External tool testing at pilot municipality Laingsburg Aim to roll-out of the tool to a wider group of municipalities

6 NRW Pre-Feasibility Tool Considerations 1. Apparent/commercial losses changes (e.g. via removal of illegal connections) 2. Real/physical losses changes (e.g. via pressure management) 3. System Input Volume changes (e.g. via improved customer education) 4. Authorised consumption changes (e.g. via increasing customers receiving bills)

7 Tool Components 1. Supply basic inputs 2. View current status 3. Prioritise your interventions Check for unexplained leakage 4. How do you achieve your goals? Populate interventions 5. What would your updated performance be? 6. Does this make financial sense?

8 Menu

9 Data Input

10 Current Performace

11 Intervention Examples Institutional Intervention No / limited WC/WDM Programme Basic WC/WDM Programme Advanced WC/WDM Programme Fill vacancies X X X Establish water loss task team X X X Review policies / bylaws X X Training and capacity building Financial Effective metering and billing : Non-domestic X X X Effective metering and billing : Domestic X X Review water tariffs X X Social Awareness : Internal X X X Awareness : Schools and institutions X X X Awareness : Stakeholders and community X X Effective customer care centre X X Informative billing Courtesy: Willem Wegelin (WRP) X X Technical Intervention No / limited WC/WDM Programme Basic WC/WDM Programme Advanced WC/WDM Programme Develop WDM strategy and business plan X X X Bulk metering total supply X X X Bulk metering and sectorisation : Zones X X Bulk metering and sectorisation : Districts Leak repairs : Reticulation network X X X Leak repairs : Private properties X X X Consumer metering : Non-domestic X X X Consumer metering : Domestic X X Analysis : Water balance X X X Analysis : Night flow analysis Pressure management X X Asset management : Control valves X X X Asset management : Valve audits & reticulation X X Asset management : Selective mains replacement X X X

12 Tool Scenarios Interventions Target water balance and possible savings Potential savings from various interventions Authorised consumption Billed authorised consumption Unbilled authorised consumption Potential savings from increased water use efficiency Implemented through Community awareness Bylaws and enforcement Retrofit and removal of wasteful devices Tariff setting System Input Volume Water losses Unavoidable annual commercial losses Economic level of commercial losses reduction Potential savings from a reduction in commercial losses Unavoidable annual real losses Implemented through the improvement of Meter accuracy and assumption errors Data transfer errors Data analysis and assumption errors Theft and unauthorised consumption Pressure reduction Economic level of physical losses reduction Active and passive leakage control Potential savings from reduction in physical losses Implemented through Mains replacement Speed and quality of repairs Courtesy: Willem Wegelin (WRP)

13 Complete Scenarios Interventions

14 Water Balance (Before and After Interventions)

15 Updated Performance

16 Does this make financial sense? Are we talking the CFO s language? Loss Profit

17 Value Impact Assessment

18 Are you systems optimised? Have you investigated your improvement options?

19 Have you developed your improvement strategy? Are you implementing your strategy?

20 If these questions are difficult to answer then you may want to use the NRW Pre-Feasibility Tool! The funding of this tool by GreenCape is gratefully acknowledged