Estimating the surface runoff volume of Wadi Abu Ghar basin using the (CN-CSC) method.

Abstract

         The researcher relies on the (CN-scs) method with the availability of information on land covers, as well as a description of the new vegetation cover and the highest target value for the photosynthetic plant class with an area of ​​approximately (4217.69 km2). The soil types are known to be of class A with an area of ​​(7262.0 km2), but class B has an area of ​​(807 km2). Also, knowing the values ​​of (N) which expresses soil permeability, the coefficient (S), which expresses the maximum potential for the soil to retain water, the coefficient (la), which shows the amount of rainwater lost, as well as (Q), which expresses the depth of surface runoff. As for QV, it recorded its highest value at around (5.680km2) . Abu Ghar is located in the southwest of our homeland in the southern desert, and part of its sources extends into Saudi territory within the Hafr Al-Batin Governorate. It descends from the southwest towards the northeast. Astronomically, it is located between longitudes (46.30-45.28) east and latitudes (30.44-28.50) east, with an area of ​​approximately (8068.0 km2). The time limits extend from the year (2014-2024).