Geo-Hazard Susceptibility Assessment and Its Impacts on Livelihoods in Kerio Valley, Kenya  

作　　者：Mark Boitt John Gathoni Mark Boitt;John Gathoni(Institute of Geomatics, GIS and Remote Sensing, Dedan Kimathi University of Technology, Nyeri, Kenya;Department of Research and Development, GIS and Remote Sensing Section-Mapinfotek, Nairobi, Kenya)

机构地区：[1]Institute of Geomatics, GIS and Remote Sensing, Dedan Kimathi University of Technology, Nyeri, Kenya [2]Department of Research and Development, GIS and Remote Sensing Section-Mapinfotek, Nairobi, Kenya

出　　处：《International Journal of Geosciences》2022年第3期199-243,共45页地球科学国际期刊（英文）

摘　　要：Geohazards are a recurrent issue in the Kerio River catchment of Kenya, which usually results in life and property loss. This research focuses on mapping geo-hazard risk zones of the region. The risk zones were developed from a combination of land use land cover maps, agroecological zones maps and soil erosion maps using the Analytical Hierarchy Process method of multi-criteria analysis. The final results depict the geohazard risk maps which show the susceptibility of different areas in the catchment (classified as risk zones) to hazards. The zones range from no risk zones to very high-risk zones. The results showed that the lowlands are most susceptible to hazards as they were classified as high-risk zones. These risk zone areas have impacts on the socio-economic development hence negatively impacting livelihoods in the area.Geohazards are a recurrent issue in the Kerio River catchment of Kenya, which usually results in life and property loss. This research focuses on mapping geo-hazard risk zones of the region. The risk zones were developed from a combination of land use land cover maps, agroecological zones maps and soil erosion maps using the Analytical Hierarchy Process method of multi-criteria analysis. The final results depict the geohazard risk maps which show the susceptibility of different areas in the catchment (classified as risk zones) to hazards. The zones range from no risk zones to very high-risk zones. The results showed that the lowlands are most susceptible to hazards as they were classified as high-risk zones. These risk zone areas have impacts on the socio-economic development hence negatively impacting livelihoods in the area.

关 键 词：Kerio Valley Basin Land Use Land Cover Moisture Zones Agroecological Zones Soil Erosion RUSLE Model Geohazard Risk Zones Multivariate Clustering Analytical Hierarchy Process 

分 类 号：O17[理学—数学]