Institute of Technology

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    ASSESSMENT OF WATER DISTRIBUTION NETWORK OF ADOLA WAYOU TOWN WATER DISTRIBUTION SYSTEM
    (Hawassa University, 2022-10-21) SOLOMON SEYOUM DAMISSE
    Water distribution systems are designed to fulfill all requirements of water demand needed for decades. Initial system designs frequently consider any anticipated changes likely to happen. However, as times elapsed they slowly begin to fail to satisfy customer’ requirement; both in quantity and quality. This research was conducted by aiming to undertake the assessment of water distribution network of Adola Wayou Town for existing water distribution system which is located southern Oromia region of Ethiopia. The main objective of this research study was to investigate the states of the existing water distribution system by assessing water demand, and water production, hydraulic parameter analysis and water loss and the cause in the distribution system. The research depend on the secondary and primary data which was collected from design document, literature, journals and reports, field observation, interviews and discussion with water utility office to analysis water loss and the cause and water service coverage. The town water distribution network had been analyzed using computer model Water GEMs connected edition under both steady-state and extended period simulation for the present population scenarios. The simulation result of the model for maximum and minimum pressure and velocity was used as the base to analysis the hydraulic performance of the water network during peak hour consumption times and low consumption times. From the analysis result about 11.62% of the nodes have the negative pressure. Additionally, the model output results indicate that about 63 pipe in water network system has the velocity below minimum requirement of 0.6m/s during peak hour consumption time. The total domestic and non-domestic water demand of town was 3421.12m3 /day. From the water produced from the treatment source the non-revenue water in the town water system was considered as 31.93% of distributed water in distribution system. The actual/real water loss share large volume that accounts about, 312,545.2m 3 /year whereas the apparent loss 60,412.79m 3 /year. The finding of the study showed that the service coverage and average connection per family of the town were estimated in the order of 62.65% and 41% respectively. In general the result of the research study of water distribution network system indicates that Adola Wayou Town water utility office under current situation was inefficient. Accordingly it’s required to provide efficient and more reliable water system through pressure zoning, improving pipe size, and planning another water distribution system, giving more attention to water loss reduction police and strategies to reduce the waste actual/real and apparent loss
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    ASSESSMENT WATER DISTRIBUTION NETWORK OF WERABE TOWN WATER SUPPLY SYSTEM, SNNP, ETHIOPIA
    (Hawassa University, 2023-10-21) MIFTA SEID HUSSEN
    It's mandatory to assess the hydraulic performance of water supply distribution systems to address water distribution issues in an urban water supply system. This can be accomplished by analyzing the current status of the water distribution system. This study was aimed to analyze the existing water distribution system in Werabe town using WaterGEMS software. WaterGEMS model was used for automated calibration and analyzing the hydraulic parameters of water distribution system. To reduce the difference between measured and predicted pressure, the model was calibrated at the selected nodes within good performance. The result showed that the water supply coverage was low which covers only 69.5%. besides water demand and supply of Werabe town were not balanced. The people used daily water of 41.7 l/day with the billed water amount is 70% of production and 30% water is considered to be non-revenue (NRW). The simulation result of the existing water distribution system showed that, during peak hour demand 27.68% of junction have within the recommended pressure ranges of minimum 15 m and maximum 70 m H2O. The hydraulic performance analysis also revealed that 82.11% and 44.6 % of total pipes have velocity below 0.6m/s at minimum and peak demand respectively. The study concluded that the hydraulic performance of Werabe town water supply distribution system is running below the expected level. Thus, the high pressures in the distribution should be managed by using pressure reducing valves and a low pressure and velocity should be improved by making rehabilitation of existing boreholes, which satisfy the existing peak water demand