Application of Hydrograph Analysis Techniques for Estimating Groundwater Contribution in the Sor and Gebba Streams of the Baro-Akobo River Basin, Southwestern Ethiopia

The Sor and Gebba watershed has undergone several natural anthropogenic changes, as evidenced by the physical alterations artificial mismanagement of water resources in watershed. These situations alter underground storage aquifer contribution to streams. Thus, understanding baseflow enables us identify groundwater system potential dynamicity. main objective this research is estimate using hydrograph analysis techniques there was neither an organized carried out at level nor studies on various methods estimation these Hence, involves estimating from daily streamflow data manual technique, Flow Duration Curve (FDC), timeplot, Web-based Hydrograph Analysis Tool (WHAT), US Geological Survey Groundwater Toolbox (USGS GW Toolbox), Baseflow index program (BFI+). result shows that most automated filtering used with presumed parameters have estimated above-average compared FDC techniques. Moreover, resulted a below-average value streamflow. BFI values are proportional for streams about 33% entire