Assessment of Water Loss in Water Supply Networks (A Case of Debre Markos Town)
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Date
2015-07
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Addis Ababa University
Abstract
Reduction of non-revenue water is one of the major challenges facing many water utilities in
Ethiopia in general and Debre Markos water supply system in particular. So, the study focuses on
the assessment of water loss in water supply networks in Debre Markos town using statistical
analysis, Water audit and water CAD software. A statistical analysis was applied to analyze the
current water supply coverage of the entire town. Water audit software was used to analyze water
loss components and the efficiency of the system was evaluated using different performance
indicators .Water CAD6.5 software was also used to simulation the distribution water supply
network. Discussions were made with Local experts’ to support the quantitative analysis. From the
result of the analysis, it was observed that the total water loss in Debre Markos water supply
system is high reaches up to 40% of the system input volume and about 33% of the total
system loss is real losses and 7% apparent losses. Besides, the average daily per capita water
consumption of the town is 24 liter/person/day. In general, the low water supply coverage of the
town was highly influenced by the availability of water. However, the main reasons for the high
loss of water in Debre Markos water supply system are the present way of water network
management with ad-hoc maintenance and insufficient financial resources of the utility. Thus, it is
necessary to identify the losses encountered in the water supply system so as to take remedial
actions in reducing the water loss more significantly.
Key words: assessment of water loss, water supply network, water supply coverage, non-revenue
water, water audit software, water CAD, performance indicator, Debre Markos.
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Keywords
Assessment of water loss, Water supply network, Water supply coverage, Non-revenue water, Water audit software, Water CAD, Performance indicator, Debre Markos