Reconnaissance of freshwater conditions in a coastal aquifer: synthesis of 1D geoelectric resistivity inversion and geohydrological analysis

摘要: Despite the saltwater intrusion of Gulf Suez, a Quaternary alluvial aquifer constitutes main source freshwater in coastal city El-Tor, administrative capital South Sinai, Egypt. A conceptual technique synthesizing one-dimension (1D) Schlumberger geoelectric resistivity inversion, geohydrological analysis, borehole data, pumping tests and hydrochemical analysis is conducted to reconnaissance condition study area. Aquifer qualitative quantitative properties terms electric hydraulic conditions were investigated. Furthermore, loss relation regime was analysed as well. The effectively demarcated with true thickness ranges 71~110 ohm-m 22~83 m, respectively. eastern part reveals better characterized by increased values (83 m), tortuosity (1.306), conductivity (53 m/day), transmissivity (4399 m2/day), formation factor (4.4), storativity (0.267) grain size. Whereas, it characterizes decreased electrical (1.2 ~ 7.5 mS/m), anisotropy (1.08), mean (285.5 ohm-m), porosity (38.7%) total dissolved solid (TDS) (530 ppm).