Institute of Technology

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The Institute of Technology focuses on education, research, and innovation in engineering, technology, and applied sciences to support sustainable development.

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    PERFORMANCE ASSESSMENT OF URBAN DRAINAGE SYSTEM USING STORM WATER MANAGEMENT MODEL (SWMM): THE CASE OF ALETA WONDO TOWN, SIDAMA REGIONAL STATE
    (Hawassa University, 2022-07-22) SAMUEL YONKORA
    The drainage system were one of the most important factors to be considered in the urban drainage infrastructure plan. Now in adequate urban storm water drainage problems represent one of the most common source of compliant numerous town of Ethiopia. Drainage problem in Aleta wondo Town is the worest issue of over flooding on the surface runoff at highly rainfall season. Unfortunately, street flooding and overtopping drainage system problem are occurring at the rainy season in a Town.The main objective of this study was to assess the hydraulic performance of drainage system Aleta Wondo Town. The study employed both primary and secondary data collection from the field surveying work was conducted to inspect the existing drainage condition and to measure channel geometric conditions. The meteorological approaches employed in this study include, the identification of the existing drainage network flow direction and delineation of contributing area. The Storm Water Management Model( SWMM5.1) was applied to simulate the water level in the links and junctions. The simulated result indicate that 1.162m3 /s average flow rate,1.632m3 /s maximum flow rate and 12.457*103 m 3 total annual volume runoff. The hydrological analysis was computed by the the rational method. The result shows the existing drainage system of Aleta Wondo Town were not well connected drainage lines and silted by different waste material because of the capacity of drainage system can‟t handle the current runoff that flows over the area. Therefore, some adjustment or improvement to give the best service and needs a series of regular maintenance and drainage should be well designed and constructed to the standard and managed properly
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    PERFORMANCE EVALUATION OF THE BILATE AND FURFURO IRRIGATION SCHEMES IN SILTI ZONE, SOUTHERN ETHIOPIA
    (Hawassa University, 2022-10-22) MULUGETA ABEBO ABO
    This study attempts to evaluate the performance of the Bilate and Furfuro irrigation schemes in Silti Zone, Southern Ethiopia using internal and external performance indicators. To achieve the aim the primary and secondary data were gathered. Two schemes were evaluated by their own merits using internal performance indicators and a comparison was also made using external performance indicators. For field data measurements three farmers’ fields were selected at the head, middle, and tail-end of each scheme. The results of analyses revealed that average field application, water storage and overall irrigation efficiencies were 55.9 & 58%, 53 & 46.5% and 28 & 32% for Bilate and Furfuro schemes respectively. This implied that the two schemes were performing inefficiently and inadequately, but, water distributed uniformly. The results obtained for conveyance efficiencies implied that most canal sections had unreasonable losses of water in two schemes. The results of external indicators show that, RWS, RIS, WDC, OPUIA, OPUCA, OPUIS, OPUWC, SIA and IR were 0.68 & 0.79, 0.61 & 0.77, 0.66 & 0.53, 4140.4 & 1781.5 $/ha, 4510.3 & 1968.5 $/ha, 0.94 & 0.28 $/m3 , 0.99 & 0.39 $/m3 , 1.05 & 1.02, 1.11 & 1.09 for Bilate and Furfuro schemes respectively. This revealed that the applied water was not satisfied the crop water demand, but their irrigated lands were expanded for two irrigation schemes. Furfuro scheme was better than Bilate in terms of relative water supply and relative irrigation supply, but their results obtained were below acceptable values. However, Bilate scheme had significantly better land and water productivity than Furfuro scheme due to used high value crops, better agricultural inputs and removal of grass cover and sedimentation from canal systems. Hence, Bilate irrigation scheme was better performing than Furfuro scheme. Therefore, adopt the best practices learned from Bilate irrigation scheme for the Furfuro scheme. Moreover, properly maintain malfunctioned infrastructures, create WUAs and agricultural experts, and create awareness for farmers and WUAs on irrigation water management in two schemes.
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    PERFORMANCE EVALUATION OF GOLDA SMALL-SCALE IRRIGATION SCHEME IN ASSOSA WOREDA, BENISHANGUL GUMUZ REGIONAL STATE, ETHIOPIA
    (Hawassa University, 2019-10-27) MINIEBEL FENTAHUN MOGES
    Evaluation of the performance of irrigation schemes helps to know the present status of the scheme and to apply possible measures for improvement. Golda small scale irrigation scheme was found in Assosa, Benishangul Gumuz regional state, Ethiopia and had a service of six years. The performance of Golda Small Scale Irrigation Scheme had not been evaluated before this study. Therefore, this study was conducted to evaluate the scheme by considering water delivery performance, on field water management performance and organizational setups and their performance for irrigation water management and maintenance. Primary data collected through field measurements and household field survey, and secondary data from different sources were used. Water delivery was evaluated by external indicators such as conveyance efficiency, relative water supply and relative irrigation supply. Both internal and external indicators were used for evaluating on field water management performance. The internal indicators were application efficiency, storage efficiency, distribution uniformity and deep percolation ratio. The external indicators like agricultural out puts, physical and financial indicators were used. The result of conveyance efficiency, application efficiency, storage efficiency, distribution efficiency and deep percolation ratio, were 53%, 51.6%, 91.6%, 80.76% & 40% respectively. The value of relative water supply and relative irrigation supply were 1.6 and 1.2 respectively. The result of output per unit command area, output per unit irrigated area, output per unit water supply and output per unit water consumed were 3542.66US$, 4306.76US$, 1.42 and 0.69, respectively. The result of the physical indicators, which were irrigation ratio and sustainability of irrigated area, were found to be 0.82 and 1, respectively. Around 54% of gross return on investment was obtained.. About 67.6% of respondents reflected the maintenance condition of the irrigation scheme was bad. Unfair distribution of water was due to water scarcity and illegal water users as the beneficiaries responded. Generally, the scheme requires improvement measures