Urban Flood Vulnerability and Risk Mapping Using Integrated Multi-Parametric AHP and GIS: Methodological Overview and Case Study Assessment

摘要: This study aims at providing expertise for preparing public-based flood mapping and estimating risks in growing urban areas. To model predict the magnitude of risk areas, an integrated Analytical Hierarchy Process (AHP) Geographic Information System (GIS) analysis techniques are used case Eldoret Municipality Kenya. The vulnerability follows a multi-parametric approach integrates some flooding causative factors such as rainfall distribution, elevation slope, drainage network density, land-use/land-cover soil type. From mapping, index (UFRI) area, which is determined by degree exposure also derived. results validated using depth measurements, with minimum average difference 0.01 m maximum 0.37 observed different prone Similarly respect to area extents, error not more than 8% was highly vulnerable zones. In addition, Consistency Ratio shows acceptable level 0.09 calculated further strength proposed approach.