Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis
Flash flooding is one of the periodic geohazards in the eastern desert of Egypt where many parts of Upper Egypt, Sinai, and Red Sea areas were hit by severe flash floods, for example in 1976, 1982, 1996 and January 2010. The hazard degree for each sub-basin was determined using the approach develop...
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| Format: | Article |
| Language: | English |
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Environmental Research Institute, Chulalongkorn University
2018-02-01
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| Series: | Applied Environmental Research |
| Subjects: | |
| Online Access: | https://ph01.tci-thaijo.org/jer/index.php/aer/article/view/95080 |
| _version_ | 1797294900024180736 |
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| author | Wael M. Elsadek Mona G. Ibrahim Wael E. Mahmod |
| author_facet | Wael M. Elsadek Mona G. Ibrahim Wael E. Mahmod |
| author_sort | Wael M. Elsadek |
| collection | DOAJ |
| description |
Flash flooding is one of the periodic geohazards in the eastern desert of Egypt where many parts of Upper Egypt, Sinai, and Red Sea areas were hit by severe flash floods, for example in 1976, 1982, 1996 and January 2010. The hazard degree for each sub-basin was determined using the approach developed by El-Shamy for assessing susceptibility of sub-basins to flash flooding risk. To identify at-risk sub-basins, two different methods were applied. The first method is based on the relationship between the drainage density and bifurcation ratio, and the second one uses the relationship between drainage frequency and bifurcation ratio. The three morphometric parameters (the bifurcation ratio, drainage density, and stream frequency) were extracted and calculated for each sub-basin of the watershed. Based on the final hazard degree resulting from the two methods, a detailed hazard degree map was extracted for all sub-basins. The results illustrate that there are no sub-basins with low risk of flooding. The sub-basins with the highest hazard degree are concentrated in the middle of the watershed although they have smaller areas compared with the surrounding sub-basins. The sub-basins located at the boundary of the watershed have an intermediate risk of flooding and moderate potential for groundwater recharge. This constructed map can be used as a basic data for assessment of flood mitigation and planning.
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| first_indexed | 2024-03-07T21:37:53Z |
| format | Article |
| id | doaj.art-b7fdac96b58944688a71409dac8b18bc |
| institution | Directory Open Access Journal |
| issn | 2287-075X |
| language | English |
| last_indexed | 2024-03-07T21:37:53Z |
| publishDate | 2018-02-01 |
| publisher | Environmental Research Institute, Chulalongkorn University |
| record_format | Article |
| series | Applied Environmental Research |
| spelling | doaj.art-b7fdac96b58944688a71409dac8b18bc2024-02-26T10:50:23ZengEnvironmental Research Institute, Chulalongkorn UniversityApplied Environmental Research2287-075X2018-02-0140110.35762/AER.2018.40.1.4Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric AnalysisWael M. Elsadek0Mona G. Ibrahim1Wael E. Mahmod2Faculty of Engineering, Egypt-Japan University of Science and Technology, Alexandria, EgyptHigh Institute of Public Health, Alexandria University, Alexandria, EgyptFaculty of Engineering, Assiut University, Assiut, Egypt Flash flooding is one of the periodic geohazards in the eastern desert of Egypt where many parts of Upper Egypt, Sinai, and Red Sea areas were hit by severe flash floods, for example in 1976, 1982, 1996 and January 2010. The hazard degree for each sub-basin was determined using the approach developed by El-Shamy for assessing susceptibility of sub-basins to flash flooding risk. To identify at-risk sub-basins, two different methods were applied. The first method is based on the relationship between the drainage density and bifurcation ratio, and the second one uses the relationship between drainage frequency and bifurcation ratio. The three morphometric parameters (the bifurcation ratio, drainage density, and stream frequency) were extracted and calculated for each sub-basin of the watershed. Based on the final hazard degree resulting from the two methods, a detailed hazard degree map was extracted for all sub-basins. The results illustrate that there are no sub-basins with low risk of flooding. The sub-basins with the highest hazard degree are concentrated in the middle of the watershed although they have smaller areas compared with the surrounding sub-basins. The sub-basins located at the boundary of the watershed have an intermediate risk of flooding and moderate potential for groundwater recharge. This constructed map can be used as a basic data for assessment of flood mitigation and planning. https://ph01.tci-thaijo.org/jer/index.php/aer/article/view/95080MorphometryRiskFlood hazardGroundwater rechargeEastern desert of EgyptGeographic information systems |
| spellingShingle | Wael M. Elsadek Mona G. Ibrahim Wael E. Mahmod Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis Applied Environmental Research Morphometry Risk Flood hazard Groundwater recharge Eastern desert of Egypt Geographic information systems |
| title | Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis |
| title_full | Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis |
| title_fullStr | Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis |
| title_full_unstemmed | Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis |
| title_short | Flash Flood Risk Estimation of Wadi Qena Watershed, Egypt Using GIS Based Morphometric Analysis |
| title_sort | flash flood risk estimation of wadi qena watershed egypt using gis based morphometric analysis |
| topic | Morphometry Risk Flood hazard Groundwater recharge Eastern desert of Egypt Geographic information systems |
| url | https://ph01.tci-thaijo.org/jer/index.php/aer/article/view/95080 |
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