Flood hazards and risk mapping using geospatial technologies in Jimma City, southwestern Ethiopia

Weday, Mohammed Abdella; Tabor, Kenate Worku; Gemeda, Dessalegn Obsi

doi:10.1016/j.heliyon.2023.e14617

Cited by 16 publications

(3 citation statements)

References 61 publications

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“…The situation is aggravated by the lack of knowledge and contingency plans on the part of the population and local authorities. Likewise, several authors [56][57][58] have found that densely populated areas are the most affected by floods, while less populated and higher areas present are less at risk. Both studies mention that the direct relationship between population density, the quality of housing infrastructure, drainage infrastructure and vulnerability to flooding contributes to the generation of risks as observed in the results presented, which also emphasize that urban flooding can cause property damage, loss of life and the spread of waterborne diseases.…”

Section: Discussionmentioning

confidence: 99%

River Flood Risk Assessment in Communities of the Peruvian Andes: A Semiquantitative Application for Disaster Prevention

Ccopi-Trucios,

Barzola-Rojas,

Ruiz-Soto

et al. 2023

Sustainability

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River floods are common natural phenomena that occur when the flow of water exceeds the capacity of a river due to excessive rainfall. In the Peruvian territory, the heavy rains of 2010 had consequences of great magnitude, leaving more than 5000 people affected and 25 dead in the Peruvian Andes. This research aimed to analyze and determine the level of risk due to river floods in communities of the Peruvian Andes in terms of hazard and vulnerability, using a semi-quantitative methodology and applying a multi-criteria analysis with vector information and raster from the national spatial data infrastructure that acted as triggering and conditioning factors, as well as conducting fieldwork with the application of targeted surveys. Then, the geoprocessing of thematic maps through GIS software was carried out. The research findings indicate that virtually the entire study area, approximately 99.26%, is at a high level of hazard, with only a small 0.74% classified as very high hazard. In other words, the entire studied territory is susceptible to floods. Furthermore, it is noteworthy that over 75% of the households in this area face vulnerability to floods, resulting in 99.15% of them being categorized at a high-risk level. It is concluded that river flooding represents a potential risk in large areas of the high Andean community due to the existence of various social, economic and environmental factors that make this phenomenon catastrophic.

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Section: Discussionmentioning

confidence: 99%

River Flood Risk Assessment in Communities of the Peruvian Andes: A Semiquantitative Application for Disaster Prevention

Ccopi-Trucios,

Barzola-Rojas,

Ruiz-Soto

et al. 2023

Sustainability

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“…Floods can occur in both urban and rural locations for a variety of reasons, including physical and socioeconomic factors. GIS approaches have been used to identify ood hazards and for risk susceptibility mapping (So a et al, 2017; and Weday et al, 2023). A number of catchment area features must be analyzed to determine hazards, which include identifying ood zones, evaluating the return period associated with being submerged, determining the depth and length of submergence, and determining the speed of the current.…”

Section: Flood Hazard Mappingmentioning

confidence: 99%

Flood Impacts on Household Livelihoods and Its Mitigation Strategies: Focus of Gelana Woreda, Oromia, Ethiopia

Deresse,

Baye

2024

Preprint

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This study assessed the impact of floods on household livelihoods and mitigation strategies in Gelana Woreda, Oromia, Ethiopia. The study's goals included determining the contributing cause, calculating the flood's impact, evaluating household mitigation activities in reaction to the threat of flooding, and evaluating how household livelihoods were impacted by the risk of a flood. The results of the study indicate that different flood effect factors cause interpersonal flood variability to increase slightly. Over a ten-year period, seasonal migration (16.6%), disruption of human health (3%), and loss of life (1.5%) were the three most common shocks from flood-induced disasters in the study area; heavy rain/flash flooding (29.7%) and river flooding (49.2%) were the two main causes of these shocks. Based on the GIS-generated flood map, 46.5% of the kebeles chosen for the Gelana district were categorized as having a high risk of flooding; marginally more than 2.3%; and the remaining 22.1%, 19.5%, and 2.3% had extremely high, low, and moderately hazardous levels, respectively, indicating a greater risk of flooding. Whereas Jirme and Bore have areas with extremely low and medium flood threats, the areas surrounding Kersa, Metari, and Shamole Shida are classified as having highly hazardous and moderate hazardous flood danger. However, in the research region, the main obstacles to flood mitigation were informational gaps (15.6%), lack of funding (28.6%), absence of government support (18.6%), and reluctance to join farmer associations (14.1%). Raising farmers' knowledge of agricultural technologies, structural mitigation, environmental restoration, ease of access to credit services, diversification of income streams, building farmers' capacity, promoting multiple strategies as the main flood mitigation strategies, and raising household standards in the study area are therefore important.

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“…Most studies have concentrated on the detailed analysis of a single potentially destructive natural phenomenon: floods [ [12] , [13] , [14] ], landslides [ 15 , 16 ], and earthquakes [ 17 , 18 ]. However, a region is affected not only by a specific natural hazard but also by a series of geo-hazards.…”

Section: Introductionmentioning

confidence: 99%

Geo-hazards assessment and land suitability estimation for spatial planning using multi-criteria analysis

Chelariu¹,

Minea²,

Iaţu³

2023

Heliyon

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Flood hazards and risk mapping using geospatial technologies in Jimma City, southwestern Ethiopia

Cited by 16 publications

References 61 publications

River Flood Risk Assessment in Communities of the Peruvian Andes: A Semiquantitative Application for Disaster Prevention

River Flood Risk Assessment in Communities of the Peruvian Andes: A Semiquantitative Application for Disaster Prevention

Flood Impacts on Household Livelihoods and Its Mitigation Strategies: Focus of Gelana Woreda, Oromia, Ethiopia

Geo-hazards assessment and land suitability estimation for spatial planning using multi-criteria analysis

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