Performance Evaluation of Aleltu-Tiko Small- Scale Irrigation Scheme Water Distribution Systems: (A Case of Hidabu-Abote District, North Showa Zone, Oromia, Ethiopia).

Abstract

Irrigation development has been identified as an important tool to stimulate economic growth and rural development, and is considered as a food security and poverty reduction in Ethiopia. While a lot of effort is being exerted towards irrigation development little attempt is being made toward the performance and sustainability of already constructed schemes. The aim of this study was to evaluate the performance of Aleltu Tiko small-scale irrigation schemes using performance indicators. The primary data were collected by observations, household survey, discussion and flow measurements, Secondary data were also collected through literature reviews from previous researchers, Hidabu Abote Woreda agricultural office, Sire Morose kebele irrigation experts and household surveys .GIS software used for the map delineated for the study area and excel software packages were used for the analysis of the data. The primary data were collected through field measurement and obviation. These include measurement of canal velocity using floating method to determine discharge. Secondary data were also collected through literature reviews from previous researchers, Hidabu Abote Woreda agricultural office, Sire Morose kebele irrigation experts‟ zonal agricultural office and Necessary data collected from Oromia Engineering Corporation and household surveys. GIS software used for the map delineated for the study area and Microsoft Excel (Spreadsheet) were used for the analysis of the data. CROPWAT 8.0 computer model was used to calculate the crop water requirements and irrigation water requirements. System and from Goha-Tsion Meteorological Station. Microsoft Excels, CROPWAT 8.0 software and CLIMWAT 2.0 for CROPWAT 8.0 software used to analyze the data. The results show that, the total diverted water was 24.767 l/s (213.987.74m3/season). While the depth of Crop Water Requirement for the cropping season of the scheme is also 364.26 l/s (31,964 m3 /season) by volume of water was demanded. The insufficiency of irrigation water, the type of irrigation system in use, the poor maintenance of irrigation structures and the main problems identified in the management and operations of the scheme.