Estimating Surface Runoff Volume for the Wadi Al-Jadida Basin in Al-Alam Subdistrict Using the SCS-CN Method
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Abstract
This study relied on the CN–SCS method, one of the most important techniques used for estimating water harvesting potential. It was developed by the Soil Conservation Service (SCS) of the United States Department of Agriculture (USDA) under the name Runoff Curve Number (RCN) in 1970, and its final formula was established in 1986. One of the key advantages of this system is its accurate and comprehensive coverage of all land-use types. It also provides a clear and precise representation of antecedent soil moisture conditions.
Furthermore, the method explains soil porosity and permeability by classifying soils into four different hydrological groups. These groups indicate the suitability of each category in generating surface runoff. This model is characterized by its high accuracy in this field.
To obtain accurate and reliable results using the adopted model, Remote Sensing (RS) and Geographic Information Systems (GIS) techniques were employed.
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