This study investigates climatic and hydrologic changes of the Tafna basin, by using ten outputs precipitation temperature from RCMs Cordex-Africa project. Different methods bias-correction (LS, LOCI, DM VS) are compared to correct bias datasets observations. The suitable method, DM, reduces 1.27 mm for 0.06 0.7°C minimum/maximum temperature, respectively. bias-corrected introduced into SWAT mo...