Hydraulic Engineering

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Browsing Hydraulic Engineering by Subject "Adama Town Water Supply"

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    Assessment of Water Quality (The Case Study of Adama Town)
    (Addis Ababa University, 2016-05) Gebissa, Abreham; Sahilu, Geremew (PhD)
    This study focuses on the assessment of existing drinking water quality in Adama Town, which is located in East Shoa zone; it is found in the administrative of National Regional state of Oromia. It is far from Addis Ababa 100km on the old asphalt high way road to Harar.The town gets its Water supply from a treatment plant.The two consequential methods were used to achieve these objectives.The first method in volved the collection of samples from different locations of the study area followed by laboratory analysis, and the Second method in volved the use of simulation models such as Epanet Software to identify the pressure effect on residual chlorine in the water supply gravity distribution network system.For bacteriological analysis, the whole 45 representative samples were randomly selected from sensitive areas for expected pollution such as raw water, treatment plant ,service reservoir, water points, ends of pipe network, Sensetive points and customer point of user, and 45 samples were used for physicochemical analysis. The results obtained show that Iron concentration is equal to World Health Organization permissible limit.The residual chlorine was zero in 45 samples except Koka treatment plant on frist round sample taking and laboratory test results. But after Constant- Head drip chlorinator on Lugo reservoirs and taken sample second round and test in laboratory the results of residual chlorine give us 0.02-0.3mg/l at the consumer’s water tap and at reservoirs get 0.8mg/l residual chlorine.The results of Color concentration during Wet and Dry seasons were found between the ranges of 9-17 TCU.This result is greater than WHO maximum permissible limit values and less than Ethiopian maximum permissible limit values.The majority of samples less than the maximum World Health Organization and Ethiopia permissible limit.the result of bacteriological analyses indicated that in most of the samples no risk was observed after construct temporary Constant-head drip chlorinator. For future parmenently chlorination is recommended at Lugo reservoirs. The simulation results showed that the pressure has inversely relationship with the residual chlorine in the distribution systems of the networks. Key words: - Water quality Modeling, GIS, GPS, Global Mapper, Epanet, Physical, Chemical, Bacteriological, Adama Town Water Supply