Hydrogeophysical Study of the Effect of AlKhod Dam on the Groundwater and Saline/Fresh Water Interface using TDEM Method-AlKhod Area, Oman

One-third of the population of Oman depends on groundwater extracted from the alluvium along the cost of the Gulf of Oman. However, groundwater depletion and seawater intrusion constitute major challenges along coastal aquifers in Oman. The objective of this study is to locate the extent of seawater intrusion and to map the shallow layer aquifer in the region where water accumulates from the rain or flooding at AlKhod dam. In order to assesses the effect of the groundwater infiltration, which recharge the aquifer and fight the seawater invasion, a quantitative approach for the groundwater quality and distribution is required to provide us with good knowledge of the spatial distribution of the aquifer thickness and the nature of sediments. Where wells and their geologic logs are not available or not deep enough, geophysical surveys should be considered due to its low cost and short acquisition time. Application of Time-Domain Electromagnetic (TDEM) method proved to be a successful in mapping the fresh/saline water interface and in locating the depth of fresh water aquifer in AlKhod area, Oman. Citation El-Kaliouby, H., [2013] Hydrogeophysical study of the effect of AlKhod dam on the groundwater and saline/fresh water interface using TDEM method-- AlKhod area, Oman. EAGE conference on engineering geophysics, Al Ain, UAE, Nov 24-27. Authors/Affiliations Hesham El-Kaliouby (1), (2) (1) Sultan Qaboos University, Earth Science Dept., Oman (2) National Research Center, Geophysics Dept., Egypt