TASK OF EPANET ANALYSIS OF EXISTING WATER DISTRIBUTION SYSTEM AT DIRE DAWA CITY, ETHIOPIA

Many problems in provision of adequate water supply to the rapidly growing and developing cities are increasing dramatically recently. Dire Dawa, the second populist city in Ethiopia is one of such cities where the existing water supply system ceases to supply adequate water needed by the residents. The main problem associated with the present water supply system is due to expiry of the existing design. Based on information available, this was designed earlier 1982 and commenced in 1992. During this time gap residents had faced severe water shortage and various problems. Hence, at this stage, time has come to redesign the existing water supply system at Dire Dawa. For the present study and analysis, Sabian region of Dire Dawa city is selected in all aspects like population; existing water supply conditions and type of material used for pipes etc. for study area are considered. This study mainly aims to give approximate required values for next thirty years. Hence population is projected accordingly and the corresponding results are presented in further sections. In order to alleviate the present problem of study area, a computer based tool called EPANET (Environmental Protection Agency NETwork) analysis is selected and processed the network in order to obtain accurate and approximate results with in no time. In this study, various hydraulic parameters like required pressure heads at nodes, head of water, friction factor, velocity in various pipes of network, flow etc. are studied in detailed and found that they are in permissible lim