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Hydraulic Simulation of Existing Water Distribution System using EPANET at Dire Dawa City, Ethiopia
The objective of this work is to simulate distribution network and to enhance the efficiency of existing water distribution network to supplying potable water to end users round the clock. Network of the study area is simulated in EPANET by using latest imagery of the study area is collected using Google satellite imagery as per the known latitudes, longitudes for the study area. The scheme design is prepared so that required output is obtained by using available input parameters like population of the study area, rate of growth in population and elevation at required point to install service reservoir. Therefore with all the available input parameters, now the network is run through EPANET tool and the results are thoroughly checked with standards. At the final step, the output results that are obtained after successful RUN from EPANET tool, they are cross checked thoroughly with standard required values. If any of the corresponding values are not within permissible limits, then the network is adjusted accordingly to the required input parameters and again the network will be examined in EPANET tool. This process is repeated until the parameters like velocity, friction factor, water head, pressure head, diameter and friction factor values are in the specific range. Pressure head at all nodes in the study area are having sufficient pressure to extract water. Flow in all pipes or links are adequate enough to withstand the pressures at nodes. Roughness coefficients of pipes are all quite sufficient as the head loss due to friction is little. It is also proposed to install air valves at high elevations and sluice valves at low elevations. The practical applications like, plan and improve a system’s hydraulic performance, maintain & improve the quality of water delivered to consumers and study the disinfectant loss and by-product formation.
EPANET, Hydraulic Simulation, Links, Nodes, Water Distribution Network (WDN).
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