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Perfomance of rehabilitated irrigation systems: a case study of Igomelo irrigation scheme in Tanzania

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dc.creator Mchelle, Amy Richard
dc.date 2015-02-03T08:23:25Z
dc.date 2015-02-03T08:23:25Z
dc.date 2011
dc.date.accessioned 2022-10-25T08:53:09Z
dc.date.available 2022-10-25T08:53:09Z
dc.identifier Mchelle,A.R(2011).Perfomance of rehabilitated irrigation systems: a case study of Igomelo irrigation scheme in Tanzania .Morogoro; Sokoine university of agriculture.
dc.identifier https://www.suaire.sua.ac.tz/handle/123456789/356
dc.identifier.uri http://hdl.handle.net/123456789/93428
dc.description Many irrigation systems indicate failures with respect to their anticipated benefits. However, improvement of these schemes can be brought about through their rehabilitation. The aim of this study was to evaluate the performance of Igomelo rehabilitated irrigation scheme covering both the performance of irrigation water distribution systems and the roles of irrigators association.The scheme was divided into three reaches upper, middle and tail end. Three plots with maize, tomatoes and onions from each reach were randomly selected. Amount of water entering the plots were monitored for adequacy, equity, dependability and productivity analysis. Also three canals each from the mentioned reaches was assessed for seepage, maintenance and conveyance efficiencies. The IA wasevaluated using indicatorsSADC- ICART such as structures’ condition, effectiveness in fees collection (EFC) and financial self sufficiency (FSS). A structured questionnaire was administered in order to obtain information on irrigation and roles of irrigators association. The conveyance efficiencies in the main canal were 68.2% with values between 69and 87% for tertiary canals. Seepage ranging between 0.044 and 0.104l/s per meter lengthwas also observed in the canals. A SCI of 90% was obtained showing structures in good working condition.Despite a good FSS (1.10 -2.21) some structures lack some components. Adequacy in water supply is good with Relative Water Supply (RWS) between 0.92 and 3.96with highest RWS at the middle reach. However, the dependability in water supply was low while equity in water supply was observed in tomato plots than in maize and onions. The output per unitwater supply for tomato was between 684.4 and 14492.55 US$ha -1 while the highest output per unit water3 supply for tomato and maize were (1.68kg/m 3 )and (0.83kg/m 3 )respectively. However, not significantly different (p< 0.01). From both the IA and the water distribution systems the performance of the scheme is good.
dc.description SADC- ICART
dc.format application/pdf
dc.language en
dc.publisher Sokoine university of agriculture
dc.subject Irrigation systems
dc.subject Irrigation scheme
dc.subject Irrigation water
dc.subject Irrigators association
dc.title Perfomance of rehabilitated irrigation systems: a case study of Igomelo irrigation scheme in Tanzania
dc.type Thesis


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