Climate change impacts on hydrology and water resources of the upper blue nile river basin, Ethiopia
This report aims to evaluate the impacts of climate change on both hydrologic regimes and water resources of the Upper Blue Nile River Basin in Ethiopia where observed hydrologic data are limited. The downstream countries of the Nile River Basin are sensitive to the variability of runoff from the Ethiopian part of the basin. This report presents three steps for analyzing climate change impacts on hydrology and water resources. The first is the construction of the climate change scenarios whereby the outcomes of multiple general circulation models (GCMs) are used to perturb the baseline climate scenario representing the current precipitation and temperature patterns. The second is runoff simulation by using a simple two-tank hydrologic model due to the limited data availability and the scale of the sub-basins. In the final step, climate change impacts on hydrology and water resources are examined using a set of indices.