Full Description

The gap between the sophisticated Non-Revenue Water (NRW) reduction programs in well managed water utilitiesand the situation in many of the world's water utilities (and especially in utilities in developing countries) is widening at afast pace. In the last decade a comprehensive set of analytical tools, water loss reduction strategies and specializedequipment has been developed. The work of the International Water Association (IWA) Operation and Maintenance Specialist Group in general, and itsWater Loss Task Force in particular, has led to a set of performance indicators ideally suited to assess the water losssituation and to quantify the components of NRW.This paper outlines a basic NRW reduction strategy and is intended to motivate utility managers to establish a standardwater balance, calculate the level of NRW, quantify its components and identify main problem areas.Part one of this paper deals with the tasks required to investigate and assess the components of non-revenue water(NRW). This is a necessary first step in a diagnostic approach to understanding the condition of the network, the way itis operated, and the constraints acting upon it.The second part of the paper deals with the tasks and tools required to address the constraints, and to develop astrategy to reduce NRW which is practicable and achievable, and which can be adapted for any distribution networkanywhere in the world. Includes 8 references, tables, figures.

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Edition: Vol. - No. Published: 06/17/2004 Number of Pages: 21 File Size: 1 file , 650 KB