| dc.description.abstract | Climate change, with its reaching implications, has become a popular topic in recent
years. Among the many aspects of climate change, one of the most pressing concerns has been
identified as the impact on the terrestrial water cycle, which has a direct impact on human settlement
and ecosystems. The paper begins by reviewing previous studies, and then identifies their flaws
and future research directions. The effects of climate change on surface water resources in the
Dhidhessa Sub-basin, Abbay Basin, Ethiopia, were studied as practices. For future potential climate
change, the results of global climate models (GCMs) and high-resolution regional climate models
(RCMs) from multiple climate models were combined with data from Representative Concentration
Pathways (RCPs) prepared by the Intergovernmental Panel on Climate Change from the CCAFS
Data Distribution Center web page. To evaluate the impacts on water resources, various distributed
hydrologic models based on local underlying surfaces were developed. The future potential climate
change of the Dhidhessa Sub-basin Province was evaluated by integrating RCP outputs, whereas
the climate change of the Dhidhessa River was directly derived from the results of different RCP.
Dhidhessa stream flow will decrease in the future compared to the baseline era. The predictions of
future discharge (stream flow) were based on climate scenarios data from 1991 to 2020 and for the
future with two time windows, 2044 (2030–2059) and 2084 (2070–2099), on a monthly time-step after
bias correction to both precipitation and temperature in the future climate described in the under each
RCP. According to model results, the quantity of surface water resources in the Dhidhessa river region
will decrease over the next 100 years, the percent decrease in mean annual stream flow by 10%, in
2044, and 6.3% in 2084, respectively, making the impact of temperature increase on runoff greater than
that of precipitation. The distribution of runoff would be more even across years but more uneven
across years in the long-term window, implying a higher possibility of drought and flooding. In
general, this study discovered that any effect on this river that results in a decrease in flow will have
a direct impact on the area’s ongoing water resource development and socioeconomic development. | en_US |
