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Hydraulic network of the study area is simulated using Bentley water GEMS V8i (SELECT series5) by using the data on the urban personal geo database of the town. The hydraulic simulation in the existing network system to satisfy the reliability of hydraulic parameters such as the pressure at a junction, head loss m/km at each pipe material and flow of water were modeled. The model was calibrated according to the observed pressure in five junctions. The result showed that the water supply scope was very low which covers only 56.3%, besides water demand and supply of Adwa town were not balanced. The residents of a town used daily water 37.69 l/day for different domestic activities with the billed water amount is 69.9% of production and around 30.10%water is considered to be non-revenue (NRW) and the apparent losses and real losses of the town was 15.6% and 14.5% respectively. The other observed problem in Adwa town is intermittent pipe leakage in the water distribution network during which the town water utilities do not have an instantaneous comeback for conservation. In this study, the hydraulic inefficiency in the existing water system to serve the Adwa town has been proved. The drawbacks of the existing water distribution system is modified using Darwin designer Water GEMS V8i tool. The modified simulation results showed the maximum pressure and minimum pressure, maximum velocity and minimum velocity are in the allowable pressure and allowable velocity respectively |
