Water loss/ Leak management

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Water loss/ Leak management

• JN BHAGWAN

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Introduction

• WRCs activities on water loss management and
  efficient use was initiated in the early 80s
• It is during period that foresight and strategic
  planning emphasised the need for water
  conservation and demand management.
• In a paradigm of supply driven approaches and the
  looming sexy Lesotho Highlands project on the
  cards, this aspect received very little attention
  from the broader sector.
• Against this background, the WRC persisted.

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What did we achieve ?

• The WRC introduce a number of studies to
  highlight and demonstrate and quantify
  inefficient use. Some of these include studies
  to determine
• Water use in high, medium and low income areas,
  down to the detail of quantifying water usage for
  bathing, brushing teeth, flushing, washing, lawns
  etc.
• Introduction and development of technology to
  detect and determine water loss or leak detection
• Piloting and demonstrating these technologies
• Developing guidelines and strategies for WC/WDM
• Education materials on Water Conservation for
  households

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What has been the impact?

• Limited application obtained over the period pre
  new Water Act.
• Much of the knowledge gained over this period has
  contributed significantly to shaping the new
  Water Act and the Water Resources Strategy.
• Data and information became important in shaping
  water legislation towards WC/WDM

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Post new water legislation

• Further development of the BABE concepts
• Development of suite of state of the art tools
  and guidelines
• SANFLOW
• ECONOLEAK
• BENCHLEAK
• PRESMAC
• South Africa regarded as leaders and concepts
  developed finding application internationally
  (USA, Australia, Far East, Africa, UN etc.)
• New impetus seeing greater application of
  research outputs in South Africa
• Water Loss management gaining importance and norm
  in the sector (JHB, Ethekweni, Cape Town,
  Kimberly, Odi Moretele)

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Results of leakage management initiatives.

• Formalised the concepts of leak management
• Emanates in the SABS Code of Practice 0132
• Adopted in the Water Services Act and Norms and
  Standards ( includes the use of water efficient
  and saving devices)
• Requirement in terms of the WSDPs
• Sector application is happening..

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Babe Methodology
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BABE CONCEPTS
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ILI Ratio of CARL to UARLSA average
7.0International average 4Ideal situation 3
and below
Table 6 Key Performance Indicators
Utility Ref No. Unavoidable Annual Real Losses Unavoidable Annual Real Losses Infrastructure Leakage Index
(Ml/yr) (l/conn /day) ILI
1 6 086 53 6.2
2 4 510 44 5.2
3 2 722 46 4.2
4 3 322 57 3.0
5 3 202 83 5.2
6 1 576 41 2.6
7 3 526 121 9.1
8 1 237 48 5.4
9 1 452 58 2.9
10 1 752 70 4.3
11 1 682 77 10.2
12 1 083 51 3.4
13 860 50 2.2
14 604 39 4.6
15 499 38 11.8
16 722 58 3.7
17 776 66 4.3
18 829 73 4.4
10
19 349 53 9.4
20 305 51 1.9
21 190 49 17.5
22 275 73 19.8
23 203 58 2.9
24 165 49 6.4
25 119 37 2.0
26 120 56 3.7
27 113 73 10.0
28 124 85 2.7
29 39 40 6.5
30 33 50 9.4
31 28 58 4.4
32 21 40 11.3
33 26 73 1.0
34 7 74 17.0
Averages 1 134 59 6.4
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Way Ahead

• Continue disseminate concepts and tools
• Continue developing competency and capacity to
  achieve greater application
• Huge opportunities for efficiency gains
• More emphasis and importance needed at a national
  level
• Further research into improving methods and tools
  to make waterloss management more effective