Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia
Land degradation due to population growth, climate change and variability and other anthropogenic activities are main factors for the occurrence of flooding in Ethiopia. This study aimed to investigate flood incidence causes in the Ribb river. Possible causes of flooding were identified from literat...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2023-09-01
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| Series: | Natural Hazards Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266659212300046X |
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| author | Getacher Teshome Nigatu Bizuneh Asfaw Abebe Berhane Grum Mebrahtom Gebremariam Kebedew Eshetie Mengesha Semane |
| author_facet | Getacher Teshome Nigatu Bizuneh Asfaw Abebe Berhane Grum Mebrahtom Gebremariam Kebedew Eshetie Mengesha Semane |
| author_sort | Getacher Teshome Nigatu |
| collection | DOAJ |
| description | Land degradation due to population growth, climate change and variability and other anthropogenic activities are main factors for the occurrence of flooding in Ethiopia. This study aimed to investigate flood incidence causes in the Ribb river. Possible causes of flooding were identified from literature. To recognize the causes, trend analysis of rainfall to know possible climate change, stream flow analysis to know possible land cover change and lake water level trend analysis to know backwater effect were conducted using the Mann-Kendall test. Land use land cover change review was also conducted. El Niño Southern Oscillation (ENSO) correspondence on rainfall extremes to know the climate pattern effect was conducted using correlation of Southern Oscillation Index (SOI) with summer rainfall anomaly. Structured interview with purposely and systematically selected flood plain community, focus group discussion with Woreda level early warning and response group leaders and natural resource conservation experts were used to confirm causes of flooding. At the end, landscape based mitigation measures from watershed morphometric analysis were proposed using integrated mission for sustainable development (IMSD) and FAO guidelines. The results indicated that the causes of flooding are combination of factors such as anthropogenic activities (expansion of cultivated land, significant lake water level rise and decreasing channel conveyance), climate change (significant increase in wet conditions), inadequate drainage and torrential rainfall. From the landscape based mitigation measures, a total of 7 check dams, 55 farm ponds, 29 percolation ponds and terracing were proposed. |
| first_indexed | 2024-03-11T07:33:56Z |
| format | Article |
| id | doaj.art-6bdb3034390a41f4bbc526b2ac3e348b |
| institution | Directory Open Access Journal |
| issn | 2666-5921 |
| language | English |
| last_indexed | 2024-03-11T07:33:56Z |
| publishDate | 2023-09-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Natural Hazards Research |
| spelling | doaj.art-6bdb3034390a41f4bbc526b2ac3e348b2023-11-17T05:28:15ZengKeAi Communications Co. Ltd.Natural Hazards Research2666-59212023-09-0133408419Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern EthiopiaGetacher Teshome Nigatu0Bizuneh Asfaw Abebe1Berhane Grum2Mebrahtom Gebremariam Kebedew3Eshetie Mengesha Semane4Mekelle University, Ethiopian Institute of Technology, School of Civil Engineering, Department of Hydraulic and Water Resource Engineering, Ethiopia; Corresponding author.Mekelle University, Ethiopian Institute of Technology, School of Civil Engineering, Department of Hydraulic and Water Resource Engineering, EthiopiaMekelle University, Ethiopian Institute of Technology, School of Civil Engineering, Department of Hydraulic and Water Resource Engineering, EthiopiaMekelle University, Ethiopian Institute of Technology, School of Civil Engineering, Department of Hydraulic and Water Resource Engineering, EthiopiaMekelle University, Ethiopian Institute of Technology, School of Civil Engineering, Department of Irrigation and Drainage Engineering, EthiopiaLand degradation due to population growth, climate change and variability and other anthropogenic activities are main factors for the occurrence of flooding in Ethiopia. This study aimed to investigate flood incidence causes in the Ribb river. Possible causes of flooding were identified from literature. To recognize the causes, trend analysis of rainfall to know possible climate change, stream flow analysis to know possible land cover change and lake water level trend analysis to know backwater effect were conducted using the Mann-Kendall test. Land use land cover change review was also conducted. El Niño Southern Oscillation (ENSO) correspondence on rainfall extremes to know the climate pattern effect was conducted using correlation of Southern Oscillation Index (SOI) with summer rainfall anomaly. Structured interview with purposely and systematically selected flood plain community, focus group discussion with Woreda level early warning and response group leaders and natural resource conservation experts were used to confirm causes of flooding. At the end, landscape based mitigation measures from watershed morphometric analysis were proposed using integrated mission for sustainable development (IMSD) and FAO guidelines. The results indicated that the causes of flooding are combination of factors such as anthropogenic activities (expansion of cultivated land, significant lake water level rise and decreasing channel conveyance), climate change (significant increase in wet conditions), inadequate drainage and torrential rainfall. From the landscape based mitigation measures, a total of 7 check dams, 55 farm ponds, 29 percolation ponds and terracing were proposed.http://www.sciencedirect.com/science/article/pii/S266659212300046XFloodRibb riverMann-KendallLand use land cover changeMorphometric analysisPurposive sampling |
| spellingShingle | Getacher Teshome Nigatu Bizuneh Asfaw Abebe Berhane Grum Mebrahtom Gebremariam Kebedew Eshetie Mengesha Semane Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia Natural Hazards Research Flood Ribb river Mann-Kendall Land use land cover change Morphometric analysis Purposive sampling |
| title | Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia |
| title_full | Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia |
| title_fullStr | Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia |
| title_full_unstemmed | Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia |
| title_short | Investigation of flood incidence causes and mitigation: Case study of Ribb river, northwestern Ethiopia |
| title_sort | investigation of flood incidence causes and mitigation case study of ribb river northwestern ethiopia |
| topic | Flood Ribb river Mann-Kendall Land use land cover change Morphometric analysis Purposive sampling |
| url | http://www.sciencedirect.com/science/article/pii/S266659212300046X |
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