Groundwater Recharge, Evapotranspiration and Surface Runoff Estimation Using WetSpass Modeling Method in Illala Catchment, Northern Ethiopia

摘要: Hydrometeorological information is important in planning and management of natural resources. The northern Ethiopia general Illala sub-basin particular lacking reliable with regard to groundwater recharge, evapotranspiration surface runoff. main objective the study estimate distributed runoff amount sub basin using WetSpass modeling method. Long term mean hydrometeorological data physical characteristics catchment such as land use/land cover, soil type, topography, level slope are used an input model. annual were found be 66, 440 40mm respectively. Accordingly, recharge accounts for 12% precipitation while rest 81% 7% becomes area characterized by low due presence high rate associated temperature, dry wind, rainfall relative humidity though it a little bit large compared some parts Ethiopia. Keywords : Groundwater, WetSpass, Recharge, Illala, Catchment, Tigray,