Moreover, the performance indices illustrate the problematic nodes and pipelines in the network which need improvement. The minimum network performance for the velocity index is observed in the pipes of low-velocity value below the minimum standard limit. On the other hand, the velocity index of the network is low and below the acceptance level. Further, the performance of WDN for pressure indices is lower for those nodes. The results revealed that a higher value of pressure is observed at some nodes, which may cause leakage of water in the system. The output of hydraulic simulation for parameters is used as the input data for the calculation of indices. Bentley WaterGEMS V8i is applied for the simulation of hydraulic models, whereas the model building and the calculation of network performance indices (pressure and velocity) are carried out in ArcGIS. ![]() ![]() For this purpose, a combination of advanced hydraulic modeling tools (WaterGEMS V8i), GIS, and performance index is used. This study aims to assess the hydraulic performance of the water distribution network (WDN) for parts of Dire Dawa city (Zone-1) in Ethiopia. Hydraulic performance of a water distribution network (WDN) could be evaluated through an assessment indicating the ability of the system to meet the required quantity of water for consumers at every time and place.
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