Estimating the Surface Runoff Volume of Wadi al- Deir Basin in Mosul District Using the (CN- SCS) Method
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Abstract
The researcher utilized the CN-SCS method, a significant approach for estimating water harvest, developed by the Soil Conservation Department of the United States Department of Agriculture (Soil Conservation Service) in 1970. The renowned formula associated with this method was developed in 1986. The SCS method consists of a series of mathematical equations that provide valuable information about land covers, usage patterns, soil hydrology, vegetation cover, and rainfall amounts. This information is used to determine water flow characteristics and the feasibility of water harvesting in Wadi al-Deir basin. The method involves analyzing the description of land cover and identifying the hydrological properties of soils in the region. The initial soil moisture level was assessed, and upon completing these three components, the values of CN were derived, representing the soil's permeability, the coefficient (s), indicating the soil's maximum water retention capacity, and the coefficient (LA), indicating the amount of rainwater lost prior to the onset of surface runoff. The coefficients (2) and (CV) represent the depth and amount of surface runoff in the Region.
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