**4. Conclusions**

The study evaluated the impact of climate change-induced on the sediment yield and streamflow of the Genale catchment, Ethiopia, for the medium-future period 2022–2080 under the RCP 4.5 and RCP 8.5 emission scenarios. The SWAT hydrological model was applied to simulate discharge and sediment yield, and the SUFI-2 algorithm technique in the SWAT-CUP tool was used for parameterization. The

*Evaluation of Climate Change-Induced Impact on Streamflow and Sediment Yield of Genale… DOI: http://dx.doi.org/10.5772/intechopen.98515*

process of uncertainty analysis, calibration (1990–2005), & validation (2006–2013) for both discharge and sediment were satisfactory. The sensitivity analysis enabled that the SCS curve number (CN2.mgt), an available water capacity of the soil layer (SOL\_AWC.sol), and saturated hydraulic conductivity (SOL\_K.sol) are the most sensitive parameters for runoff estimation.

The study used the change of climate scenarios built up using the outcomes biascorrected CORDEX RCM daily precipitation, min/mean/max temperature for Ethiopia under RCP 4.5 and RCP 8.5 emission scenarios and fed them into the validated SWAT model to simulate future changes in streamflow and sediment yields due to change of climate. The average monthly change of streamflow for the RCP4.5 and RCP8.5 was running from 16.47% to 6.58% and 3.6% to 8.27%, respectively, of 2022–2080. The monthly average changes in sediment yield for the RCP4.5 and RCP8.5 scenarios were 21.8% to 6.2% and 5.6% to 4.66%, respectively, over 2022–2080. The monthly average discharge varies significantly throughout the year and relatively high in March, April, May, August, September, and October. The monthly streamflow and sediment yield variations were more during the wet seasons (Autumn and Spring). The results revealed that the impact of climate changes induced on sediment yield is more significant than streamflow under the two emission scenarios for 2022–2080.

The results revealed that regional decision-makers and other stakeholders are helpful for the effective adaptive strategy, plan & management practices of soil and water resources improvement under changing climate.
