دمج بيانات الاستشعار عن بعد و نظم المعلومات الجغرافية و الرصد الميداني للسيول لتقدير المعاملات الهيدرولوجية بوادي عرنة بمنطقة مكة المكرمة و المشاعر المقدسة

الملخص EN

This paper has investigated the hydrology of Wadi Urana in Makkah area using the application of Geographic Information System (GIS) in the analysis of Digital Elevation Models (DEM) and field work data, as well as remote sensing images.

These data were integrated to determine the relation between the active drainage channels and the distribution of different landuse and landcover within the catchment.

The field observations and measurements of the flow parameters for the 30th of December 2010 flash flood event were utilized to estimate the runoff hydrograph.

The total precipitation (45 mm) was estimated from the ground stations and the TRMM remote sensing data, and it approximately produced 7 million cubic meters of runoff, which has variably distributed over a continuous period of 10 hours.

The analysis of satellite images shortly acquired after the flash flood event showed that the flows of Wadi Urana has passed thorough Al Husayniyah urban area, as indicated by the high albedo of slack deposits within active channels and routes.

Therefore, the development of a hydrological model for the dryland could benefit from the integration of multiple remote sensing and field work and DEM dataset, in order to estimate the resulting flash floods and to achieve the optimum mitigation strategies.