2015/06/24. Presented by: André Kowalewski. Drakenstein Municipality within Cape Winelands Area

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Giles Rogers
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1 Presented by: André Kowalewski Drakenstein Municipality within Cape Winelands Area 1

Drakenstein Municipal Area WDM/WCM Interventions The following Water Demand Management and Conservation interventions where established.

2 Drakenstein Municipal Area WDM/WCM Interventions The following Water Demand Management and Conservation interventions where established. - Hydraulic Modeling of water reticulation network for all towns. - Introduction of a five step rising block tariff scheme. - Pressure Management Imitative was implemented. - Metering of all unmetered water connections and metering of all fire fighting water connections. - Increased public awareness and promotion of water saving devices. - Refurbishment/replacement of existing water network (10.3km/2014/2015). 2

3 Results and Successes Water Demand (Ml/year) Annual Demand 0(Megalitres) Paarl Water Demand Total Water Demand Years Theoretical Savings Paarl Water Demand 1989 to Saving of litres Saving of R872 R5/kl Actual Demand Projected 3.5 % Time (Years) 3

4 Non Revenue water since Paarl Non-Revenue Water % NRW 80 % Non-Revenue Water % NRW TIme (Years) Non-Revenue Water Statistics Table C 5.2: Non-revenue water for the various distribution systems Record : Prior (Ml/a) Description Unit 13/14 12/13 11/12 10/11 09/10 08/09 Volume Percentage 14.00% 12.08% 11.05% 10.81% 10.20% 13.75% Paarl and Wellington ILI Paarl 2.39 W el 1.14 Paarl 1.84 W el 2.52 Paarl 2.14 W el 0.74 Volume Saron Percentage 32.23% 10.87% 10.72% 25.06% 28.50% 22.94% ILI Volume Gouda Percentage 32.07% 19.98% 19.95% 16.86% 15.65% 11.64% ILI Volume Hermon Percentage % 5.24% 35.20% 43.80% 39.97% 59.10% ILI Bainskloof Volume Percentage % 17.41% 40.65% 12.30% 11.93% Volume TOTAL Percentage 14.65% 12.11% 11.19% 11.43% 10.94% 14.15% ILI

5 Facts- Drakenstein Municipality upgrading of services before Shift to conserve and save water in Water losses of 1999 Water losses of January 2015 Measures required To sustain the Water Demand Management efforts obtained by Drakenstein Municipality the following strategy were followed, namely: Proper record keeping of data and information regarding the infrastructure (including flow measurements) Historical information of the whole reticulation systems. Training for personal and using the correct equipment for all day to day operations 5

Measures required Refurbish reticulation system using quality materials Preventative maintenance program (maintaining of valves, pumps and equipment before it become problem) Reduce pipe repair

6 Measures required Refurbish reticulation system using quality materials Preventative maintenance program (maintaining of valves, pumps and equipment before it become problem) Reduce pipe repair reaction time (attend to water burst pipe incidents, i.e. 1 hour of less) Preventative Maintenance Hydraulic Modelling Upgrading & Replacement of Infrastructure Water Saving Devices? Water Tariff Structure Public Awareness Meter Replacement Program Pressure Management 6

7 Economic Level of Leakage Meter Errors Water Active Accounting Leakage Control Errors Economic Target For Commercial Losses Meter Speed and quality Under Registration of repairs Existing Commercial Losses Water Pipe Materials Management: Theft selection, installation, maintenance, renewal, replacement 7

8 Pressure Management Management Economic Level of Real Losses Unavoidable Annual Real Losses Speed Active and Quality Leakage of Repairs Control Potentially Recoverable Real Losses Speed Active and quality Leakage of Control repairs Current Annual Real Losses Pipe Materials Management: selection, installation, maintenance, renewal, replacement 100% of reported leaks repaired within 48 Hours Pressure Management Management Economic Level of Real Losses Unavoidable Annual Real Losses Speed Active and Quality Leakage of Repairs Control Potentially Recoverable Real Losses Speed Active and quality Leakage of Control repairs Pipeline and Pipe Assets Materials Management: : selection, Selection, Installation, installation, maintenance, Maintenance, Renewal, renewal, Replacement replacement 8

50% of reported leaks repaired within 48 Hours Pressure Management Management Economic Level of Real Losses Unavoidable Annual Real Losses Speed Active and Quality Leakage of Repairs Control

9 50% of reported leaks repaired within 48 Hours Pressure Management Management Economic Level of Real Losses Unavoidable Annual Real Losses Speed Active and Quality Leakage of Repairs Control Potentially Recoverable Real Losses Speed Active and quality Leakage of Control repairs Pipeline and Pipe Assets Materials Management: : selection, Selection, Installation, installation, maintenance, Maintenance, Renewal, renewal, Replacement replacement Telemetric System 9

10 Refurbishment of Welvanpas Booster Pump Station October 2014 Valve Chamber (700mmØ) Van der Stel Street, Paarl

11 Valve Control Chamber- Newton Reservoir, Wellington - April 2015 PRV installation Denneburg, Paarl 11

12 PRV & pressure/flow controller installation- Van der Stel Street, Paarl Controller Pressure Pressure Reducing Valve Isolating Valve Pearl Valley Bulk Water Meter October

13 Refurbishment of pipework at Van Blerk Reservoir, Wellington September 2014 Water Burst pipe Thom Street, Paarl (30 Oct 2014) 13

14 Challenges Funding of projects (operational and capital funding) Shortage of qualified Technical personal Vandalism/theft of infrastructure Thank You 14

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