Water resources potential evaluation of Upper suluh river basin which is located north of AddisrnAbaba and south of the town of Adigrate town. The evaluation is done based on the analysis ofrnhydromorphometric meteorological, hydrogeological and river flow data. The has a total arearnof443 km2 with a big difference of altitude ranging from 2100 m to 3100 m above'mean searnlevel and is the sub basin of River Tekeze. It has both low land with flat to gentle slope andrnrugged topography along its peripheral area with dominant sedimentary terrain. The low landrnarea of the basin is covered with alluvial and Enticho sand stone. NNW-SSE and NE-SWrnstructures dominate in the basin especially in the north and nOltheastern P8lt of the study area.rnThe analysis result of different hydrormphic parameters overlaps with the geology andrnhydrogeology which indicates that the North -Eastern ,East-Central and limited part of westrncentral part of the ~he potential zone for ground water exploitation. From long term rnmean monthly rainfall data annual precipitation of the basin is calculated asrn72232 mm per annum. The actual and potential evapotranspiraation for the basin are 652.63rnmm and 8083 mm respectively. Of the total rainfall, 20.1 million cubic meter (MCM) waterrnleave the basin in the form of surface runoff per annum and 1 L1 million cubic meter (MCM)rnwater infiltrate within the basin, which is the annual recharge of the .basin.The ground waterrnpotential estimation of the considering 25%ofthe total area for areas 'having slope of>20% isrn336.54 MCM. Based on the permeability of the rocks the is divided in to three hydrogeologyrn groups higher permeability (L76m/d), moderate to lower permeability (L76-0.09m/d) and very lowrnpermeability group Â«0.09m/d). For ground water exploitation, the alluvial deposit and thernEnticho sand stone area are the best potential sites. rn The hydrochemistry of the basin is also analyzed and categorized in to fresh water. Boreholes,rnhand dug wells and common springs are Ca-Mg-HC03 water type but two borehole samplesrnshow Na-HC03 water type assumed to have localized dolerite influence. Concerning waterrnquality, the basin has no any water sources having values of parameters above the permissiblernlimit for water supply, irrigation and industries. With respect to irrigation the quality of groundrnwater in the is excellent to good. Presently, there is no ground water pollution indicated fromrnagriculture, industry and towns.