Abstract:
This study attempts to investigate potential impacts of future climate change on stream flow and
reservoir operation on Genale sub-basin watershed. For this study, 0.5° x 0.5° grid resolution of
bias-corrected (RCM) Regional Climate Model outputs based on Representative Concentration
Pathways (RCP4.5) emissions scenario for Genale catchment are used for analysis. A
Geographic Information System (GIS) companion product called the Geospatial Hydrologic
Modeling Extension (HEC-GeoHMS) has been developed to aid in the creation of basin models
and meteorological models to use the Hydrologic Engineering Center‟s Hydrologic Modeling
System (HEC-HMS) model for generating future stream flows and Hydrologic Engineering
Center‟s Reservoir Simulation Model (HEC-ResSim) was used for reservoir simulation and
operation study. Simulation results demonstrate the average monthly power production of Genale
Dawa-3 Hydropower project will not be affected in the future due to the inflow to the reservoir.
Hence, the flow for power production according to the design document will be fully meeting the
required amount.
