الفهرس 
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Abstract
1. Introduction :-Arid regions suffer, especially the study area (South Sinai) to the risks various environmental including flood risk in addition to the risk of geological, where it is considered of the most natural phenomena destructive, especially for road networks and the main cause of flooding is heavy rain in periods of short time with the rapid melting of the snow, where it is known that The study area characterized that there are many heights and is characterized by acute slopes as well as the low absorptive capacity of the soil because the complex geological of region. Proved remote sensing techniques and GIs, its cheap cost technology and its great capacity to identify potential areas of vulnerability to floods. 2:- Research scope:-The use of data and techniques of remote sensing and geographic information systems and images of Landsat (OLI-TIRS) in 2014, as well as aerial photographs high precision in order to study the environmental and geological impacts in the study area (South Sinai) and the work the classification to areas according to the degree of their exposure to flooding and then classification the road network according they occur in regions at risk, and according to the amount of floods that exposed. 3:- Research objective :-The main objectives of this study consisted in designate approach for precise assessment to floods through integrating several topographic, metrological, geological, and land use data in a geographic information system (GIS) environment and determine flood hazard potential areas to produced maps locate regions according hazard degree on road network. As well as Estimate surface runoff volume through Calculation of rainfall amounts in the study area and Study the impact of geological and climatic factors as on flash flood assessment Process. 4:- Steps Study :-obtain of remote sensing data represented by Landsat images of the global site and do their improvement and analyzed using visual analysis (ERDAS Imagine ver. 2014) and (ArcGIS desktop ver. 10.1) and draw their required data and then to measure the morphometric elements of the drainage basins in the region depending on the Morphometry analysis and then find the most vulnerable areas at risk of floods and the degree of seriousness on the road network in the study area to produce the final maps of areas classified by degree of risk, as well as to calculate the amount of runoff is expected in the region through the use of method (scs) and the work of the classification of the soil by land use data and vegetation in the region and know the amount of rainfall in the area of study and also to calculate the curvature degree and its impact on roads. 5:- Summary of Study:- concluded This study that the use of remote sensing and geographic information systems were less expensive and more accurate to knowledge of environmental hazards (flood), as well as geological and its impact on the road network in the study area and to identify areas most at risk of flooding, as well as to know the amount of runoff in the region where were classified road Feiran - St. Catherine as one of the most roads dangerous as it is occurs in hazard areas, and according to the amount of runoff that are exposed, while the Highway Suez - Sharm el-Sheikh was classified from moderate dangerous roads in spite of exposure it to attacks floods and many times.