تقييم الخصائص الجيولوجية والهيدرومورفومترية وتأثيرها على السلوك الهيدرولوجي لحوض نهر راويل في اقليم الساحل السوري

Abstract

□ ABSTRACT□

This research aims to identify the geological and hydromorphometric characteristics of the Rawil River Basin and analyze their hydrological implications to determine their impact on the hydrological behavior of the basin. To achieve this, geological and topographic maps, field trips, and Geographic Information Systems (GIS) techniques were used.

The study showed that the geological structure of the basin is dominated by basalt by 80% which are exposed Pliocene basalt rocks. It is characterized by its shattering by a network of dense faults and cracks, which caused an increase in the permeability of the basin and limited the speed of surface flows despite the ruggedness and large slopes in the upper parts of the basin.

The study of the morphological characteristics of the basin showed that it is longitudinally extended, which reduces the speed of the hydrological response of the basin. The value of the concentration time indicates that its response is average at the concentration point in the Al-Baqia Plain, but its value at the Rawil diversion dam in the middle of the basin reached 2.35 hours, which is a low value that shows the speed of the basin's response at that point, which poses a risk to the diversion dam due to the speed of the flood wave reaching it after heavy rainfall. The basin has a moderate drainage density, and is of the dendritic type, its main course ranks sixth.,

The analysis of the overall hydromorphometric characteristics of the basin showed a low risk of flooding, which is attributed to the dominance of cracked basalt rocks with good permeability in most areas of the basin. However, the diversion dam in the middle of the basin should be protected from the flows that follow heavy rainfall.

The results of this research can be used to understand the hydrological behavior of Rawil River Basin and the basin of Elkaber Aljonobi and contribute to the management and optimal investment of theirs water resources.