Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia
Groundwater is one of the most vital natural resources worldwide. However, shallow aquifers are prone to contamination, posing significant risks to human health, livestock, agricultural productivity, and economic growth. Identifying appropriate land management strategies is critical for mitigating g...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Elsevier
2025
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/173240 |
| _version_ | 1855537502490722304 |
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| author | Ashagrie, W. A. Tarkegn, T. G. Ray, R. L. Tefera, G. W. Demessie, S. F. Tsegaye, L. Adem, Anwar A. Worqlul, A. W. van Oel, P. R. Adgo, E. Haileslassie, Amare Dile, Y. T. Mekonnen, M. Chukalla, A. D. |
| author_browse | Adem, Anwar A. Adgo, E. Ashagrie, W. A. Chukalla, A. D. Demessie, S. F. Dile, Y. T. Haileslassie, Amare Mekonnen, M. Ray, R. L. Tarkegn, T. G. Tefera, G. W. Tsegaye, L. Worqlul, A. W. van Oel, P. R. |
| author_facet | Ashagrie, W. A. Tarkegn, T. G. Ray, R. L. Tefera, G. W. Demessie, S. F. Tsegaye, L. Adem, Anwar A. Worqlul, A. W. van Oel, P. R. Adgo, E. Haileslassie, Amare Dile, Y. T. Mekonnen, M. Chukalla, A. D. |
| author_sort | Ashagrie, W. A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Groundwater is one of the most vital natural resources worldwide. However, shallow aquifers are prone to contamination, posing significant risks to human health, livestock, agricultural productivity, and economic growth. Identifying appropriate land management strategies is critical for mitigating groundwater vulnerability to pollution. This study evaluates groundwater vulnerability to pollution under various land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia. The analysis incorporates multiple parameters within the ArcGIS environment, including depth to water table, net recharge, aquifer characteristics, soil properties, topography, vadose zone, hydraulic conductivity, and land use/land cover (LULC). In this study, LULC was added as an additional parameter to enhance the DRASTIC model. Groundwater vulnerability to pollution was evaluated under four distinct land management scenarios: baseline, agricultural expansion, urbanization, and reforestation. A single-parameter sensitivity analysis and a map removal sensitivity analysis were performed to identify the most influential parameters affecting groundwater vulnerability under the baseline LULC conditions. The result revealed that groundwater vulnerability in Bahir Dar City under baseline conditions is primarily influenced by LULC and net recharge. The areal average groundwater vulnerability to pollution index at the baseline scenario was 184. Agricultural expansion and urbanization increased the areal average groundwater vulnerability to pollution by 4.9 % and 1.6 %, respectively, while the reforestation scenario reduced it by 1.6 %. These findings highlight the critical role of effective land management practices, such as reforestation, in mitigating groundwater susceptibility to pollution. The results also indicate that groundwater vulnerability to pollution varies across different geological formations. Therefore, given the influence of geological variability on groundwater vulnerability, incorporating geological considerations into urban expansion planning is essential for minimizing the risk of groundwater contamination. |
| format | Journal Article |
| id | CGSpace173240 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1732402025-10-26T12:55:21Z Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia Ashagrie, W. A. Tarkegn, T. G. Ray, R. L. Tefera, G. W. Demessie, S. F. Tsegaye, L. Adem, Anwar A. Worqlul, A. W. van Oel, P. R. Adgo, E. Haileslassie, Amare Dile, Y. T. Mekonnen, M. Chukalla, A. D. groundwater pollution vulnerability land management spatial analysis land use land cover aquifers groundwater table models Groundwater is one of the most vital natural resources worldwide. However, shallow aquifers are prone to contamination, posing significant risks to human health, livestock, agricultural productivity, and economic growth. Identifying appropriate land management strategies is critical for mitigating groundwater vulnerability to pollution. This study evaluates groundwater vulnerability to pollution under various land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia. The analysis incorporates multiple parameters within the ArcGIS environment, including depth to water table, net recharge, aquifer characteristics, soil properties, topography, vadose zone, hydraulic conductivity, and land use/land cover (LULC). In this study, LULC was added as an additional parameter to enhance the DRASTIC model. Groundwater vulnerability to pollution was evaluated under four distinct land management scenarios: baseline, agricultural expansion, urbanization, and reforestation. A single-parameter sensitivity analysis and a map removal sensitivity analysis were performed to identify the most influential parameters affecting groundwater vulnerability under the baseline LULC conditions. The result revealed that groundwater vulnerability in Bahir Dar City under baseline conditions is primarily influenced by LULC and net recharge. The areal average groundwater vulnerability to pollution index at the baseline scenario was 184. Agricultural expansion and urbanization increased the areal average groundwater vulnerability to pollution by 4.9 % and 1.6 %, respectively, while the reforestation scenario reduced it by 1.6 %. These findings highlight the critical role of effective land management practices, such as reforestation, in mitigating groundwater susceptibility to pollution. The results also indicate that groundwater vulnerability to pollution varies across different geological formations. Therefore, given the influence of geological variability on groundwater vulnerability, incorporating geological considerations into urban expansion planning is essential for minimizing the risk of groundwater contamination. 2025-02 2025-02-20T05:28:36Z 2025-02-20T05:28:36Z Journal Article https://hdl.handle.net/10568/173240 en Open Access Elsevier Ashagrie, W. A.; Tarkegn, T. G.; Ray, R. L.; Tefera, G. W.; Demessie, S. F.; Tsegaye, L.; Adem, A. A.; Worqlul, A. W.; van Oel, P. R.; Adgo, E.; Haileslassie, Amare; Dile, Y. T.; Mekonnen, M.; Chukalla, A. D. 2025. Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia. Heliyon, 11(4):e42660. [doi: https://doi.org/10.1016/j.heliyon.2025.e42660] |
| spellingShingle | groundwater pollution vulnerability land management spatial analysis land use land cover aquifers groundwater table models Ashagrie, W. A. Tarkegn, T. G. Ray, R. L. Tefera, G. W. Demessie, S. F. Tsegaye, L. Adem, Anwar A. Worqlul, A. W. van Oel, P. R. Adgo, E. Haileslassie, Amare Dile, Y. T. Mekonnen, M. Chukalla, A. D. Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia |
| title | Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia |
| title_full | Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia |
| title_fullStr | Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia |
| title_full_unstemmed | Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia |
| title_short | Assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified DRASTIC model in Bahir Dar City, Ethiopia |
| title_sort | assessing the vulnerability of groundwater to pollution under different land management scenarios using the modified drastic model in bahir dar city ethiopia |
| topic | groundwater pollution vulnerability land management spatial analysis land use land cover aquifers groundwater table models |
| url | https://hdl.handle.net/10568/173240 |
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