Estimation of volume Runoff using (cn - scs) for Wadi Al - Ghannami basin By GIS and remote sensing

Al-Samaraie, Mohamed; ABD-ULWAHID ALI, LSRAA

doi:10.21608/aafu.2021.182093

Estimation of volume Runoff using (cn - scs) for Wadi Al - Ghannami basin By GIS and remote sensing

Document Type : Original Article

Authors

10.21608/aafu.2021.182093

Abstract

Wadi Al-Ghannami is a seasonal valleys, an area of 822.6 km2. Located in the province of Muthanna. The volume of runoff in the basin area was estimated, depending on the HEC-HMS 3.0.0 hydrology program. The program includes several models for measuring runoff. In this study, SCS-CN is the most widely used method for estimating flow depth, which deals with many variables including land use, soil quality and precipitation.The basin was divided into five secondary basins, varying in size to determine the most effective basins. It was found that the main Al-Ghannami basin contributed the highest flow rate (659.97 m3), basin higher (898.84 m3), and the eastern basin (642.67 m 3). and an estuary basin (88.74 m3) during a rainstorm. The peak discharge was between 2.34 m / s and 126.66 m / s. At a concentration time of 40.63 - 185.9 minutes, the risk of flooding increases in secondary basins and total basin.

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