The study area, Tegona River catchment, is strongly dependent on groundwater like other rural cat... more The study area, Tegona River catchment, is strongly dependent on groundwater like other rural catchments in the country. The main objective of this work is to quantify the amount of groundwater recharge in Tegona River catchment. Recharge was estimated using physically based distributed recharge model called Wets pass, chloride mass balance and Base flow separation methods. As input to the model precipitation, potential evapotranspiration, temperature and wind speed were estimated using data collected from meteorological stations located within the catchment and nearby areas. The physical environmental data including land use, soil type, and groundwater depth were collected from field and existing maps. Slope and topography map were generated from Digital Elevation Model (DEM) data. Using the model the mean annual recharge of the catchment was found to be 18.29 % of the precipitation whereas the direct runoff was found to be 57.6 % of the precipitation. Using the chloride mass balance method the mean annual recharge of the catchment was found to be 16.85 % of the precipitation. And also using the Base flow separation method the mean annual recharge of the catchment was found to be 48.23 % of the precipitation of five years (316.4 mm, Table 5.2 and fig 5.11). This study revealed that the groundwater recharge estimation using Wets pass model is reasonable and useful for quantification of annual groundwater recharge with spatial and seasonal variation and also capable in the identification of groundwater recharge zones in the area under study. Keywords: Runoff, Evapotranspiration, Groundwater Recharge, Wets pass, Tegona River catchment, Ethiopia.
The study area, Tegona River catchment, is strongly dependent on groundwater like other rural cat... more The study area, Tegona River catchment, is strongly dependent on groundwater like other rural catchments in the country. The main objective of this work is to quantify the amount of groundwater recharge in Tegona River catchment. Recharge was estimated using physically based distributed recharge model called Wets pass, chloride mass balance and Base flow separation methods. As input to the model precipitation, potential evapotranspiration, temperature and wind speed were estimated using data collected from meteorological stations located within the catchment and nearby areas. The physical environmental data including land use, soil type, and groundwater depth were collected from field and existing maps. Slope and topography map were generated from Digital Elevation Model (DEM) data. Using the model the mean annual recharge of the catchment was found to be 18.29 % of the precipitation whereas the direct runoff was found to be 57.6 % of the precipitation. Using the chloride mass balance method the mean annual recharge of the catchment was found to be 16.85 % of the precipitation. And also using the Base flow separation method the mean annual recharge of the catchment was found to be 48.23 % of the precipitation of five years (316.4 mm, Table 5.2 and fig 5.11). This study revealed that the groundwater recharge estimation using Wets pass model is reasonable and useful for quantification of annual groundwater recharge with spatial and seasonal variation and also capable in the identification of groundwater recharge zones in the area under study. Keywords: Runoff, Evapotranspiration, Groundwater Recharge, Wets pass, Tegona River catchment, Ethiopia.
Uploads
Papers by tegene tefera
Keywords: Runoff, Evapotranspiration, Groundwater Recharge, Wets pass, Tegona River catchment, Ethiopia.
Keywords: Runoff, Evapotranspiration, Groundwater Recharge, Wets pass, Tegona River catchment, Ethiopia.