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| dc.contributor.author | AMANUEL, SEMAHU BOGALE | |
| dc.date.accessioned | 2023-06-05T10:53:10Z | |
| dc.date.available | 2023-06-05T10:53:10Z | |
| dc.date.issued | 2023-03-21 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/15336 | |
| dc.description.abstract | Rural water supply systems that cover more than one village are becoming increasingly common in the Amhara region, Ethiopia. Multi-village water supply schemes have the potential to capture economies of scale and facilitate higher levels of service; they offer a feasible and long-term solution to the acute water scarcity faced by many areas in the region. The Wodo Agari rural multi-village water supply scheme, which covers four kebeles of the Asagirt district, has not reached the consumer tabs and experiences frequently burst pipes and failure of pressure control devices. The objectives of this research were to evaluate the hydraulic performance of rural multi-village water distribution systems with pressure control devices in the existing water distribution system. Both primary and secondary data sources were used for the study. To achieve this objective, the WaterGEMS model was used to examine the hydraulic performance of the water distribution network. Additional statistical analysis was used to evaluate the current hydraulic performance of the pressure break tank and compare the life cycle costs for the different pressure control devices. The model simulation was run for the system's peak and lowdemand scenarios. Comparing representative samples of the distribution main’s pressure field test with the model-simulated values showed a reasonable and small difference to calibrate the model. Simulation results for maximum, minimum pressure and velocity for different scenarios were used as a base tool to evaluate the hydraulic performance. The analysis result showed that there were various problems in the system. which are over -sized pipes related to the currently available existing source, 40% of the pipe length is in the velocity class below 0.6 m/s, 21% of the junctions were below the allowable limit (15 to 70 mH2O) of pressure at peak hour demand, and 27.65% of the junctions were above standard pressure during too low consumption (minimum hour demand). According to the life cycle cost analysis, a pressure tank is more expensive to build than a pressure reducer valve, but it has lower operational and maintenance costs. High pressures in the existing system, caused by low levels of elevation relative to the service reservoir and poor performance of pressure control devices, had been identified, and a solution was established using pressure-reducing valves and the break pressure tank in the system. key words: Multi-village, Water distribution system, WaterGEMS Model, Hydraulic performance, pressure control device, Wodo-Agari. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Civil and Water Resources Engineering | en_US |
| dc.title | EVALUATION OF HYDRAULIC PERFORMANCE OF RURAL MULTI-VILLAGE WATER DISTRIBUTION SYSTEMS: THE CASE OF WODO - AGARI, AMHARA REGION | en_US |
| dc.type | Thesis | en_US |
