توظيف تقنيتي الاستشعار عن بعد و نظم المعلومات الجغرافية : لتقييم مخاطر السيول في الجزء الأعلى من حوض وادي إبراهيم (مكة المكرمة)‎

الملخص EN

The problem of the upper part of Wadi Ibrahim Basin in the city of Makkah is a result of excessive urbanization of the land of the basin which once served as an outlet for water flooding.

This change has led to reduction in the speed of water flow in the Wadi and to a substantial increase in the volume of water during water floods, thus increasing the size of land exposed to the risk of these floods.

This research paper aims to assess the size and risks of flooding in the upper part of the basin using the American Soil Conservation Service (CN) methodology, which is one of the most widespread methods for estimating water flow in engineering studies and in natural resource management projects in the United States of America.

The study seeks to arrive at accurate estimates of the floods and their risks, which will help planners and decision makers to utilize all necessary methods to protect all facilities in urban basins, including Wadi Ibrahim Basin.

The study estimates that the volume of water flow in the basin is 60,77339 m3, and the peak of discharge is 616.4 m3/s.

Both figures show the sizable amount of water that the basin drains compared to its area.

This highlights the risk of floods on the facilities in the basin.