GEP  Vol.7 No.4 , April 2019
Watershed Delineation and Estimation of Groundwater Recharge for Ras Gharib Region, Egypt
Abstract: The present work tried to estimate the runoff discharge and groundwater recharge volumes for the catchments of Ras Gharib area using the Soil Conservation Service curve number (SCS-curve number) and the water balance methods. The two methods were selected among other methods used by hydrologists due to simplicity and popularity for application in arid and semi-arid areas like Egypt. The watershed delineation and streamlines for Ras Gharib region have been accomplished using ArcMap 10 GIS and the 1-arc second DEM which demonstrated three basins in the study area. The rainfall data points nearby the study area, extracted from the TRMM data, have been used as input for the Log-Pearson III distribution in order to calculate the design storm for different return periods (100, 50, 25, and 10 years). The results of applying the SCS model estimated the runoff depths as 19.86, 8.00, 2.32, and 0.06 mm for the different return periods, respectively. The total surface runoff volumes reached the study area are 34.78, 14.02, 4.07, and 0.11 Mm3, respectively for the selected return periods, whereas the total groundwater recharge volumes for the selected storm return periods are 58.16, 31.34, 18.14, 3.18 Mm3, respectively.
Cite this paper: Ezz, H. , Gomaah, M. , Abdelwares, M. (2019) Watershed Delineation and Estimation of Groundwater Recharge for Ras Gharib Region, Egypt. Journal of Geoscience and Environment Protection, 7, 202-213. doi: 10.4236/gep.2019.74013.

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