Flood happens repeatedly and is a common phenomenon in Ethiopia causing a lot of losses to human lives as well as damage to property. The majority of flood disasters' victims are people living in and nearby stretch of floodplains. It results direct or indirect loss of agricultural productivity, infrastructure, and disruption of transportation access and services. The objective of this study was to analyze flood inundation area mapping and Hazard Assessment of Muga River. Flood generating factors, i.e. slope, elevation, rainfall, drainage density, land use, and soil type were rated and combined to delineate flood hazard zones using a multi-criteria evaluation technique in an ArcGIS environment. The flooded areas along the Muga River have been mapped based on highest flows for different return periods using the HEC-RAS model, ArcGIS for spatial data processing and HEC-GeoRAS for interfacing between HEC-RAS and ArcGIS. The areas along the Muga River simulated to be inundated for 5, 10, 25, 50 and 100 years return periods. The flooded areas along the Muga River are 18 km~2, 21 km~2, 26 km~2, 34 km~2 and 43 km~2 for 5, 10, 25, 50 and 100 year return periods, respectively. Proper land use management and afforestation, is significant to reduce the adverse effects of flooding particularly in the low-lying flood prone areas. The result of this study will helps the concerned bodies to formulate develop strategies according to the available flood plain mapping and hazard to the area.
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机译：洪水反复发生，是埃塞俄比亚的常见现象，导致人类生活的大量损失以及对财产的损害。大多数洪水灾害的受害者是生活在附近的洪水泄漏的人。它会导致农业生产力，基础设施和交通服务的破坏的直接或间接丧失。本研究的目的是分析洪水淹没面积测绘和穆巴河的危害评估。洪水产生因子，即坡，海拔，降雨，排水密度，土地利用和土壤类型，并在ArcGIS环境中使用多标准评估技术来描绘洪水危险区。 Muga River沿着Muga River的洪水区域已根据使用HEC-RAS模型，ArcGIS用于空间数据处理和HEC-Georas的最高流程映射，用于在HEC-RAS和ArcGIS之间接口。 Muga River的区域模拟为5,10,25,50和100年的退货期。穆巴河沿岸的洪水区是18公里〜2,21公里〜2,26 km〜2，34 km〜2和4.3 km〜2，分别为5,10,25,50和100年退货期。适当的土地利用管理和造林，显着降低洪水的不利影响，特别是在低洼的洪水易发地区。本研究的结果将有助于有关机构根据可用的洪水平原映射和对该地区的危害制定发展战略。
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