ASSESSMENT OF WATER DISTRIBUTION NETWORK OF ADOLA WAYOU TOWN WATER DISTRIBUTION SYSTEM

Abstract

Water distribution systems are designed to fulfill all requirements of water demand needed for decades. Initial system designs frequently consider any anticipated changes likely to happen. However, as times elapsed they slowly begin to fail to satisfy customer’ requirement; both in quantity and quality. This research was conducted by aiming to undertake the assessment of water distribution network of Adola Wayou Town for existing water distribution system which is located southern Oromia region of Ethiopia. The main objective of this research study was to investigate the states of the existing water distribution system by assessing water demand, and water production, hydraulic parameter analysis and water loss and the cause in the distribution system. The research depend on the secondary and primary data which was collected from design document, literature, journals and reports, field observation, interviews and discussion with water utility office to analysis water loss and the cause and water service coverage. The town water distribution network had been analyzed using computer model Water GEMs connected edition under both steady-state and extended period simulation for the present population scenarios. The simulation result of the model for maximum and minimum pressure and velocity was used as the base to analysis the hydraulic performance of the water network during peak hour consumption times and low consumption times. From the analysis result about 11.62% of the nodes have the negative pressure. Additionally, the model output results indicate that about 63 pipe in water network system has the velocity below minimum requirement of 0.6m/s during peak hour consumption time. The total domestic and non-domestic water demand of town was 3421.12m3 /day. From the water produced from the treatment source the non-revenue water in the town water system was considered as 31.93% of distributed water in distribution system. The actual/real water loss share large volume that accounts about, 312,545.2m 3 /year whereas the apparent loss 60,412.79m 3 /year. The finding of the study showed that the service coverage and average connection per family of the town were estimated in the order of 62.65% and 41% respectively. In general the result of the research study of water distribution network system indicates that Adola Wayou Town water utility office under current situation was inefficient. Accordingly it’s required to provide efficient and more reliable water system through pressure zoning, improving pipe size, and planning another water distribution system, giving more attention to water loss reduction police and strategies to reduce the waste actual/real and apparent loss