Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia
The likely effects of climate and land-use/land-cover (LULC) changes on hydrologic processes in Bilate catchment, Ethiopia were evaluated. The study emphasizes the evaluation of individual and combined impacts on hydrologic responses of climate and LULC changes. Climatic scenarios included a downsca...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-12-01
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| Series: | Journal of Water and Climate Change |
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| Online Access: | http://jwcc.iwaponline.com/content/12/8/3750 |
| _version_ | 1798031791032893440 |
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| author | Hailu Gisha Kuma Fekadu Fufa Feyessa Tamene Adugna Demissie |
| author_facet | Hailu Gisha Kuma Fekadu Fufa Feyessa Tamene Adugna Demissie |
| author_sort | Hailu Gisha Kuma |
| collection | DOAJ |
| description | The likely effects of climate and land-use/land-cover (LULC) changes on hydrologic processes in Bilate catchment, Ethiopia were evaluated. The study emphasizes the evaluation of individual and combined impacts on hydrologic responses of climate and LULC changes. Climatic scenarios included a downscaled regional climate model from CORDEX-Africa. The CA–Markov model was used to project LULC. The results revealed that distinct changes on hydrologic responses occurred which follow the direction of climate and LULC changes. A 30.87% decline in rainfall resulted in about 4.09, 1.43 and 3.57% decline in runoff, groundwater and water yield, respectively. A rise in mean temperature by 1.3 °C resulted in a 7 and 0.8% increase in potential and actual evapotranspiration, respectively. Runoff, groundwater and water yield are projected to decrease by 11.24, 12.54 and 11.54%; however, potential and actual evapotranspiration are projected to increase by 19 and 14.7%, respectively, under combined climate and LULC changes. The joint effects of climate and LULC changes on hydrologic responses in the forthcoming were higher than the variation trend of climate or LULC change alone. Climate change compared with LULC change has a higher impact on hydrologic responses. The results obtained provide further insight into future water balance, and assistance in water resources planning and management. HIGHLIGHTS
The study employed CA–Markov, regional climate and SWAT models.;
The projected change in temperature and rainfall impacts the hydrologic responses.;
Hydrologic responses follow the direction of climate change.;
Individual and combined impacts of climate and land-use/land-cover changes on hydrologic responses were evaluated.;
Potential and actual evapotranspiration are projected to increase, while runoff, groundwater and water yield are projected to decrease.; |
| first_indexed | 2024-04-11T20:03:15Z |
| format | Article |
| id | doaj.art-215a14c0c86e46f99b640992eb72fc43 |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-04-11T20:03:15Z |
| publishDate | 2021-12-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-215a14c0c86e46f99b640992eb72fc432022-12-22T04:05:27ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542021-12-011283750376910.2166/wcc.2021.281281Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern EthiopiaHailu Gisha Kuma0Fekadu Fufa Feyessa1Tamene Adugna Demissie2 Jimma Institute of Technology, Jimma University, P. O. Box 378, Jimma, Ethiopia Jimma Institute of Technology, Jimma University, P. O. Box 378, Jimma, Ethiopia Jimma Institute of Technology, Jimma University, P. O. Box 378, Jimma, Ethiopia The likely effects of climate and land-use/land-cover (LULC) changes on hydrologic processes in Bilate catchment, Ethiopia were evaluated. The study emphasizes the evaluation of individual and combined impacts on hydrologic responses of climate and LULC changes. Climatic scenarios included a downscaled regional climate model from CORDEX-Africa. The CA–Markov model was used to project LULC. The results revealed that distinct changes on hydrologic responses occurred which follow the direction of climate and LULC changes. A 30.87% decline in rainfall resulted in about 4.09, 1.43 and 3.57% decline in runoff, groundwater and water yield, respectively. A rise in mean temperature by 1.3 °C resulted in a 7 and 0.8% increase in potential and actual evapotranspiration, respectively. Runoff, groundwater and water yield are projected to decrease by 11.24, 12.54 and 11.54%; however, potential and actual evapotranspiration are projected to increase by 19 and 14.7%, respectively, under combined climate and LULC changes. The joint effects of climate and LULC changes on hydrologic responses in the forthcoming were higher than the variation trend of climate or LULC change alone. Climate change compared with LULC change has a higher impact on hydrologic responses. The results obtained provide further insight into future water balance, and assistance in water resources planning and management. HIGHLIGHTS The study employed CA–Markov, regional climate and SWAT models.; The projected change in temperature and rainfall impacts the hydrologic responses.; Hydrologic responses follow the direction of climate change.; Individual and combined impacts of climate and land-use/land-cover changes on hydrologic responses were evaluated.; Potential and actual evapotranspiration are projected to increase, while runoff, groundwater and water yield are projected to decrease.;http://jwcc.iwaponline.com/content/12/8/3750bilate catchmentclimate changelulc changeswat modelwater balance |
| spellingShingle | Hailu Gisha Kuma Fekadu Fufa Feyessa Tamene Adugna Demissie Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia Journal of Water and Climate Change bilate catchment climate change lulc change swat model water balance |
| title | Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia |
| title_full | Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia |
| title_fullStr | Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia |
| title_full_unstemmed | Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia |
| title_short | Hydrologic responses to climate and land-use/land-cover changes in the Bilate catchment, Southern Ethiopia |
| title_sort | hydrologic responses to climate and land use land cover changes in the bilate catchment southern ethiopia |
| topic | bilate catchment climate change lulc change swat model water balance |
| url | http://jwcc.iwaponline.com/content/12/8/3750 |
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