Floods are produced as a result of several factors such as human-induced land-use changes, topographic conditions, and climate change. This study aimed to assess flood risk using geographic information system-based multi-criteria evaluation techniques in the Wabi Shebele River Sub-basin. Six parameters, namely, soil type, slope, land use and land cover, proximity to rivers, rainfall, and elevation, were used. The eigenvector of weight for each factor was computed in IDRISI Selva 17.0. Results show that the study area was subjected to a very high 527.31 km² (9.42%), high 2133.66 km² (38.12%), moderate 1906.44 km² (34.06%), low 847.35 km² (15.14%), and a very low 182.54 km² (3.26%) flood risk, respectively. Results reveal that the Wabi Shebele River Sub-basin is highly vulnerable to flooding. This study assists policymakers with regard to land-use planning. To reduce the effects of flood risk, integrated watershed management must be implemented in the study area.

洪水是由多种因素造成的，例如人类引起的土地利用变化、地形条件和气候变化。本研究旨在利用基于地理信息系统的多标准评估技术来评估瓦比谢贝莱河流域的洪水风险。使用了六个参数，即土壤类型、坡度、土地利用和土地覆盖、靠近河流、降雨量和海拔。每个因素的权重特征向量在 IDRISI Selva 17.0 中计算。结果表明：研究区的极高海拔527.31 km ² (9.42%)，高海拔2133.66 km ² (38.12%)，中海拔1906.44 km ² (34.06%)，低海拔847.35 km ² (15.14%)，极海拔。洪水风险分别较低 182.54 km ² (3.26%)。结果显示，瓦比谢贝莱河次流域极易遭受洪水侵袭。这项研究为政策制定者制定土地利用规划提供帮助。为了减少洪水风险的影响，必须在研究区实施综合流域管理。