Browsing by Author "Makongoro, Elfariji Kohi"

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Farmers’ utility of irrigation water supply as a method of assessing irrigation system’s performance.
(Sokoine University of Agriculture, 1997) Makongoro, Elfariji Kohi
A model which employ Farmers’ Utility of Irrigation Water Supply (FUIWS) in assessing irrigation system’s performance has been developed in this study. The methodology was tested through a Case Study at Lower Moshi Farmer Managed Irrigation Scheme (Lower Moshi FMIS). The main objective was to investigate FUIWS as a method of assessing the performance of irrigation systems. Strong relationship was observed between Relative Water Supply (RWS) and FUIWS. Wherever RWS was high FUIWS was also high and vice versa as proved by positively large covariance value obtained. However, this relationship was identified as non linear correlation by significance correlation coefficient test. The graphs plotted showed relationship of the type: R = aen Where:R = RRWS in paddy fields. U' = UFUIWS. a and n are constants. In this particular Study, the scheme model obtained was: R = 0.377e,1,2SU Similar block models were established. The homogeneity test on the block mean values showed that; RWS have the same degree of variability for all levels of FUIWS. This indicated the ability of the scheme model to be used in place of block models. Different "a" and "n" constant values obtained between blocks indicated different irrigation management levels between blocks. The method was tested in paddy rice only, therefore more work is needed to test it in upland crops; traditional and improved Farmer Managed Irrigation Scheme (FMIS). Also, more research is required to establish whether threshold values "a" and "n" are universal or not and what factors influencing them.