الفهرس | Only 14 pages are availabe for public view |
Abstract Tourism is one of the most important sources of national income in Egypt, as the national economic plan for Egypt includes the development of the Eastern Desert because of its beautiful nature and easy access to water activities. Egypt’s eastern desert is characterized by drought and scarcity of rain. However, heavy rains may occur, resulting in flash floods extending into the Red Sea coast, accompanied by loss of human life and damage to infrastructure in nearby urban areas. In arid and semi-arid areas, it is difficult to predict flash floods due to the lack of hydrological and meteorological data. Egypt is one of the arid countries facing mainly flash floods. The Bali Valley in the eastern desert was selected as a case study to predict flash flooding, and is located 8 kilometers from the tourist city of El Gouna along the coast of the Red Sea and west of Hurghada-Ismailia Road. Methodology of this research is to determine the surface runoff flow paths in the study area and then build a Hydrological model to predict the surface runoff values for the return periods of 5, 10, 25, 50 and 100 years. Finally, Building a two-dimensional hydraulic model, unsteady flow analysis of the current situation, and producing flood inundation maps. This study depends on topographic and geological maps and rainfall data available from the rain gauge station in Hurghada from 1969 to 2019. Solutions have been proposed to protect the area from flood risks based on the amount and direction of floods. This study can be applied in different regions of Egypt and arid and semi-arid regions the world Keywords: Hydrologic model HEC–HMS, 2D hydrodynamic model HEC – RAS, Flood inundation mapping, Floodplain management, Flash Floods. |