تكامل النمذجة المكانية والمحاكاة الهيدروليكية لأخطار السيول على العمران الحضري في حوض وادي إبراهيم بمدينة مكة المكرمة باستخدام تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية

Abstract EN

The research discussed the application of spatial modeling to study hydrological flow-flow in the Wadi Ibrahim Basin (one of the valleys of Makkah al-Mukarramah), which includes the holy mosque and the well of zamzam, using the (SCS-CN) model approved by the us soil conservation service, and the application of hydraulic simulation that helps in designing means of protection against the floods hazard.

the study relied on remote sensing techniques and geographic information systems to identify the characteristics of urban geomorphology for the study basin and to create the layers of land cover, and the hydrological groups of the soil.

and extracting the values of the water flow curve (CN), and rainstorms designed for return periods of 100 years were prepared based on the meteorological station for the city of Makkah al-Mukarramah.

the study reached to determine the volume of floods flow (m3), depth (mm), losses (mm), water concentration time in the basin (hour) and water velocity (km / h),floods hydrograph and the rain intensity curve were prepared, and the results showed an increase in the hazards of sudden flash floods on urban development in the direction of the main stream of the Wadi Ibrahim Basin, and using hydraulic modeling, the volume of water flow was predicted and the flow floods simulation was simulated.

and determining the sites of urban development that are affected by the flash floods hazards, and developing solutions for them, along with evaluating the projects of the current flood drainage networks.

this study helps planners and decision makers to follow the necessary methods to protect urban areas from the potential hazard of floods before, during and after their occurrence in the study area.