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An Integrated Model to Evaluate Losses in Water Distribution Systems

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  • M. Tabesh
  • A. Yekta
  • R. Burrows

Abstract

To evaluate non revenue water (NRW) and losses in water distribution networks a methodology is developed by applying “annual water balance” and “minimum night flow” analyses. In this approach the main NRW components such as leakage from reported and un-reported bursts and background leakage, with real or estimated data, enabling assessment of indices of leakage performance are evaluated. Also, a novel procedure is introduced in this paper that can determine the nodal and pipe leakage by using a hydraulic simulation model. Recognising the pressure dependency of leakage the total consumption is divided into two parts, one pressure dependent and the other independent of local pressure, and the hydraulic behaviour of the network is analyzed. A computer code is developed to evaluate all components of water losses based on the proposed methodology. For better representation of the results and management of the system, the outputs are exported to a GIS model. Using the capabilities of this GIS model, the network map and attribute data are linked and factors affecting network leakage are identified. In addition, the effects of pressure reduction are investigated. The model is illustrated by a real case study. The results show that the suggested model has overcome the shortcomings of the existing methodologies by accounting for the leakage and other NRW components in water distribution networks more realistically. Copyright Springer Science+Business Media B.V. 2009

Suggested Citation

  • M. Tabesh & A. Yekta & R. Burrows, 2009. "An Integrated Model to Evaluate Losses in Water Distribution Systems," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 23(3), pages 477-492, February.
    • Handle: RePEc:spr:waterr:v:23:y:2009:i:3:p:477-492
    DOI: 10.1007/s11269-008-9284-2
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    References listed on IDEAS

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