Water Science & Technology: Water Supply Vol 1 No 2 pp 225–230 © IWA Publishing 2001
Model of leak inspection and repair of water distribution network
Y Hosoi
Department of Social Systems Engineering, Tottori University,
Koyama Tottori, 680-8552, Japan
ABSTRACT
Theories and policies for the maintenance and renewal of water supply
systems are required. The occurrence of water distribution pipe breakage
and water leakage is influenced by pipe material, size and age as well as
soil characteristics and transportation. The water leakage has to be
discovered as soon as possible from the viewpoint of minimizing water
loss. However, it costs more to increase inspections for water leakage.
In this study, the model to determine the optimal inspection interval for
water leakage of the water distribution network was examined. The optimal
inspection interval was estimated to minimize the total cost of inspection,
pipe repair and lost water. The developed model was applied to a water
distribution area whose water main is 486 kilometres long. The area was
divided into sub-area of 250 metres square. Those sub-areas were
classified into 6 groups according to pipe break rate. The optimal
inspection interval was obtained for each group and its validity
examined by numerical simulation.
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