Performance Evaluation of Katar Irrigation Scheme

Abstract

This study was conducted to evaluate the performance of Ketar irrigation schemes at TiyoWerda, Oromia Regional State, using internal performance indicators. The irrigation schemeincluded in the study has three Command areas Ketar I area of 120 ha and 273 beneficiaries,Ketar II with area 226 ha and beneficiaries, 225 and Ketar III with 154 ha command area and359 beneficiaries. To achieve the objective primary and secondary data were collected. Primarydata collection includes, canal discharges, soil moisture before and after irrigation and depth ofwater applied. The secondary data includes crop types, total yields, farm gate prices of irrigatedcrops, area irrigated per crop per season, incomes generated by the irrigation associations,. Theirrigation scheme was compared using minimum sets of comparative performance indicators.The internal process indicators which include conveyance, application, storage, , runoff ratio,deep percolation ratio and overall irrigation efficiency were used to check the performance ofthe irrigation scheme at the three sites. From the analyses of the internal performanceindicators, the conveyance efficiencies were found to be 61.24 , 68.32%, and, 69.84 % at Ketar IKetar II, and Ketar III , respectively. The runoff ratio for the three sites of the scheme was nil asthe furrows are closed end type. Deep percolation ratios in the same order of the sites schemewere found to 38.76 %, 31.58 % and 39.54. The result of storage efficiency of selected fieldsfrom the three command area of ketar irrigation scheme were found to vary from 41.83% to51.630%, with an average storage efficiency of 45.68% in Ketar I , 43.79 to 54.90 with average49.16 % in Ketar II and 33.98 to 44.83 % with average 41 % in Ketar III. In general, theoverall efficiencies of the irrigation at command areas of Ketar I, Ketar II and Ketar III of theirrigation scheme were found to be 40.17 %, 38.17 % and 47.38 %, respectively.