GIS-based flash flooding susceptibility analysis and water management in arid mountain ranges: Safaga Region, Red Sea Mountains, Egypt
Vol20 No.12: 3665-3686
【Title】GIS-based flash flooding susceptibility analysis and water management in arid mountain ranges: Safaga Region, Red Sea Mountains, Egypt
【Author】Ahmed E. EL-RAYES1*; Mohamed O. ARNOUS1; Ahmed M. HELMY2
【Addresses】1 Geology Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt; 2 Geology Department, Faculty of Science, Arish University, Arish 45511 North Sinai, Egypt
【Corresponding author】Ahmed E. EL-RAYES
【Citation】El-Rayes AE, Arnous MO, Helmy AM (2023) GIS-based flash flooding susceptibility analysis and water management in arid mountain ranges: Safaga Region, Red Sea Mountains, Egypt. Journal of Mountain Science 20(12). https://doi.org/10.1007/s11629-023-8142-2
【DOI】https://doi.org/10.1007/s11629-023-8142-2
【Abstract】The Safaga Region (SR) is part of the Red Sea mountain range in Egypt. Catastrophic flash flooding is now an inescapable event, wreaking havoc and causing massive loss of life and property. The majority of the floodwater, however, has been wasted as runoff to the Red Sea, which, if used wisely, could meet a fraction of the water demands for a variety of applications in this area. The current work aims to use GIS techniques to integrate remote sensing data for evaluating, mitigating, and managing flash floods in SR. The data set comprised Tropical Rainfall Measuring Mission (TRMM) thematic rainfall data, 1:50,000 scale topographical map sheets, geological maps, the ASTER Digital Elevation Model (ASTER GDEM), Landsat 7 Enhanced Thematic Mapper" (ETM7+), and Landsat 8 Operational Land Imager. The flash flood risk model of SR is developed using ArcGIS-10.3 geoprocessing tools integrating all the causal factors thematic maps. The final flood risk model for the SR suggests that 57% of the total basins in the SR are at high risk of flooding. Almost 38% of all basins are at moderate flood risk. The remaining 5% of basins are less prone to flooding. Flood-prone zones were identified, suitable dam-building sites were located, and extremely probable areas for water recharge were recognized. On the basis of reliable scientific data, structural and non-structural mitigation strategies that might reduce the damage susceptibility, alleviate the sensitivity of the flash flood, and best utilize its water supply were recommended.
【Keywords】Flash floods; GIS; Susceptibility; Water management; Arid mountains; Egypt