Browsing by Author "MOHAMOUD MOHAMED ISMAIL"

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    EVALUATION OF THE EXISTING URBAN WATER SUPPLY SYSTEM: A CASE OF HARGEISA CITY, SOMALILAND
    (Hawassa University, 2020-12-17) MOHAMOUD MOHAMED ISMAIL
    Urban water supply and demand challenges are widespread problems in most of the developing countries such as Somaliland. This thesis paper focuses on the evaluation of the existing urban water supply system of Hargeisa, capital city of Somaliland. The main objectives of this study is to spot the issues of Hargeisa water system by assessing the current status of the water supply system in the town, evaluating the Hydraulic performance of the WSS and eventually propose remedial measures. The current status was evaluated rely on the difference in the supply and demand of the town by forecasting its population while the water losses was used the difference between the production and consumption data. Moreover, to investigate the existing water supply and distribution system, an EPANET software was used to develop the model. The model can be used to customize the high pressure and low pressure zones in junctions and the level of velocity through pipe. The model run was performed for average, maximum, peak and low demand situations to investigate the system model. The analysis result shows that the supplied water in the town is only covering 13.5% of the demand. Hence, this result indicates that there’s a high gap between the demand & supply. In Addition, from three years obtain data of production and consumption the average loss became 9.75%. Moreover, the result and discussion shows that there are totally different issues of the system like high pressures and low pressure whereas, the utmost pressure occurred at gravity main pipe line in night demand was 85.92m which is above the suggested value and also in the low hour demand (LHD), 100% of the velocity in the pipes is less than 0.5m/s. To handle the problems, it needs providing extra pumps to increase the production, rehabilitate the prevailing well sources, maximizing the capacity of distribution pipe line by putting new pipes