Flash flooding hazard assessment, modeling, and management in the coastal zone of Ras Ghareb City, Gulf of Suez, Egypt

Abstract The assessment of flash flood hazards in the coastal zone Ras Ghareb City (RGC), Red Sea, Egypt, was accomplished through use GIS tools and spatial multi-criteria approach. presented work aims to assess, integrate, generate potential hazard maps. analytic hierarchy process utilized calculate weights vulnerability controlling factors their parameters such as topographical, geological, hydrological factors. In addition, risk degree each specific basin its sub-basins is estimated by combining standardized parameter values. Despite location an arid region, may receive a large amount rainwater, which can cause floods at basin's outlet. Recently, flooding took place region RGC October 2016 September 2020, resulting loss many human lives catastrophic effects on local infrastructure surrounding environments. According reports from Hurghada, Sea Governorate, experienced exceptional that exceeded 120 million cubic meters result 51 mm rainfall. Based remote sensing satellite data Aster Digital Elevation Model (GDEM) tools, sub-basin drainage patterns were delineated compared with reference topographical map sheets scale 1: 50,000. have been isolated morphometrically studied determine flooding. threat model developed using geoprocessing provided ArcGIS software incorporate all contributing spatially. (RG) basins has identified classified into three classes (high, medium, low degree). High moderate flood-risk require comprehensive studies introduce measures protect certain areas danger. Finally, analyses effective ways carry out management system order support decision-makers recommendations conserve mitigate possible study areas.