Spatiotemporal variability of streamflow under current and projected climate scenarios of Andit Tid watershed, central highland of Ethiopia

This study examined the impact of climate change on streamflow in the Andit Tid watershed using climate models of dynamically downscaled Ethiopia’s CORDEX. The Arc SWAT and ArcGIS 10.5 software assessed the spatial and temporal distribution of streamflow, incorporating geospatial data like land use...

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Bibliographic Details
Published inDiscover sustainability Vol. 5; no. 1; pp. 227 - 21
Main Authors Woldemariam, Ayele Desalegn, Ddumba, Saul Daniel, Addis, Hailu Kendie, Ayele, Biruk Getaneh
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.09.2024
Springer Nature B.V
Springer
Subjects
Arc GIS
Climate
Climate change
CORDEX
Dry season
Earth and Environmental Science
Environment
Hydrology
Land use
Precipitation
Rain
Rivers
Stream flow
Streamflow
SUFI-2
Sustainable Development
Temperature
Watersheds
Ethiopia
Climate
SUFI-2
Arc GIS
CORDEX
Streamflow
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Summary:This study examined the impact of climate change on streamflow in the Andit Tid watershed using climate models of dynamically downscaled Ethiopia’s CORDEX. The Arc SWAT and ArcGIS 10.5 software assessed the spatial and temporal distribution of streamflow, incorporating geospatial data like land use maps, digital elevation models, soil maps, and climate data. The SWAT model was calibrated and validated using SWAT-CUP with the SUFI-2 algorithm. The Canadian Centre for Climate Modeling and Analysis, Canada (CCCma (RCA4) model was selected for future projections after validation. From 1991 to 2021, the average streamflow rate was 0.0374 m 3 /s (247 mm), with R 2 values of 0.83 for calibration and 0.72 for validation. Hotspots with active gullies and slopes over 20% were identified mainly in cultivated lands. Future projections indicated a comparable streamflow rate to current conditions at 0.0322 m 3 /s (212.6 mm). A decline in streamflow is projected: 7.2% and 30.2% decreases in the near and far future under RCP 4.5, and 32.3% decreases and 5% increases under RCP 8.5 scenarios. These variations were attributed to differences in catchment characteristics and climate variability. Further research is needed to validate these findings by incorporating additional biophysical variables. This study provides insights into hydrological planning and management in the Andit Tid watershed and similar regions facing climate variability.
ISSN:2662-9984
2662-9984
DOI:10.1007/s43621-024-00440-x