Trials on Hydro Meteorological Analysis for Spate Irrigation Development in Oromia, Ethiopia
摘要
The current report discusses issues of the spate irrigation project executed in the Oromia Regional state of Ethiopia in collaboration with Japan International Cooperation Agency (JICA) and Tokyo University of Agriculture (TUA), particularly addressing to necessity of watershed analysis in Boro Dodota. Spate irrigation is newly introduced in the region in modern and scientific approach since 2004, and many challenges are observed in planning, design, and management of the system. Among these challenges estimation of amount and period of occurrence of spate flood is principal. The project is located at altitude of 1,500 m that can be categorized as lowland area with frequent crop failure due to erratic rainfall and high evaporations prevailing. Automatic hydrological and meteorological observation systems with short data logging interval have been established in the divide line of Boro Dodota stream since March 2008, and data from these stations will be analyzed using GIS and compared with the actual conditions of the project. The result of the analysis will be used in water management of this scheme, and useful recommendations for other similar schemes will be forwarded.