Abstract
This research was focused on assessing and comparing the performance of two small scale irrigation schemes: Homacho sogido and Jawis irrigation in west hararghe zone by using comparative indicator. Based on the collected data four (4) comparative indicator from the nine indicators indicated by IWMI’s were selected for this study. The indicators used are output per cropped area, output per command area, and output per irrigation diverted, output per water consumed. The collected data are total yields, farm gate prices of irrigated crops, area irrigated per crop per season, crop types, production per season or per year, cropping pattern. The major crops grown in both schemes are Chat, Cabbage, Sorghum, Maize, Tomato, Soybean and Onion. The result of the analysis express that four agricultural indicators; output per cropped area, output per command area, output per water consumed and output per unit water supply are in the order of 16843.4 birr/ha, 19730.86 birr/ha, 2.23 birr/m<sup>3</sup>, 4.24birr/m<sup>3</sup> and 24304.5birr/ha, 38692.8 birr/ha, 3.29birr/m<sup>3</sup> and 4.28birr/m<sup>3</sup> for Jawis and Homacho sogido irrigation scheme, respectively. Excessive annual irrigation water was supplied by farmer in both scheme due to lack of knowledge on balancing crop water requirement and water diversion. This can be improved through training of farmer to balance crop water demand and water diversion. Homacho irrigation scheme could be benchmarked in the zone for water productivity and land productivity.
Highlights
The world population is increasing at alarming rate resulting increasing demand for food and percapita land and water resources are decreasing at alarming rate
From the comparative indicator used in this study the gap of the Homacho and Jawis irrigation scheme can be observed from the figure 2 of production indictor
The comparative indicator used in this study is useful to compare different irrigation scheme to assess the degree of utilization of the available natural resources such as: land, water and component of the scheme
Summary
The world population is increasing at alarming rate resulting increasing demand for food and percapita land and water resources are decreasing at alarming rate. Food security in developing countries is aggravated by the rapid population growth and the consequent demand for food. Irrigation is the highest water consumption sector which needs to be developed and managed in systematic manner to meet future agricultural water demand. Many large-scale irrigation schemes in least developed countries are out of the reach of smallholder farmers [15]. In these countries, small-scale irrigation is the primary donor to food security and developments in rural livelihoods. More beneficial of irrigation water allocation need a good evaluation of irrigation water allocation which need a good evaluation of irrigation of water demand, cropping pattern, designated area and project head operation
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