الدور الجيومورفولوجي للخصائص المورفومترية و التصريف المائي في الناتج الرسوبي لوادي الوالة

The geomorphological role of morphometric characteristics and water drainage in the sedimentary output of Wadi Al-Walah

This study aims at clarifying the changes that affect sediment yield in Wadi Al-Wala according to the different morphometric characteristics of basin environment and the changes that affect water discharge and other properties related to stream processes. To achieve the objectives of the study, the practical and analytical approaches were used. The practical approach is represented through conducting filed measures of water discharge and taking 63 samples from the water of the river to measure its suspended sediment. Analytical approach was used to analyze field measures and morphometric characteristics that were taken from ariel photos and topographical maps. The findings of the study were: 1- There is a positive relationship between the size of sediment yield in Wadi Al-Wala and the increase of its slope degree. 2- The study showed that the suspended load increases with the increase of the discharge. 3- The study showed the role of morphometric characteristics of Wadi Al-wala in increasing its sediment yield through increasing the strength of the streams in erosion banks, deep streams and increasing sediment yield which feeds the main stream of the valley. Keywords: Sediment Yield, Morphometric Characteristics, Water Discharge, Wadi Al-Wala, Suspended Load.