Electrical resistivity investigations for guiding and controlling fresh water well drilling in semi-arid region in Khanasser Valley,Northern Syria |
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| Authors: | Jamal Asfahani |
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| Institution: | (1) Civil and Environmental Engineering Dept., College of Engineering, UAE University, Al Ain, UAE;(2) Geology Department, College of Science, UAE University, Al Ain, UAE;(3) Department of Soil and Water Sciences, College of Agriculture, SQU, Muscat, Sultanate Oman;(4) Department of Soil and Water, Ministry of Agriculture and Fisheries, Dubai, UAE |
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| Abstract: | Electrical resistivity survey is conducted in the Khanasser Valley, considered as a semi-arid region in Northern Syria, to
guide and control fresh water well drilling. Vertical Electrical Soundings (VES) are carried out near the existing wells,
which were also used to measure salinity and conductivity of water samplings. Resistivity and hydrogeological data combination
made it possible to establish empirical relationships between earth resistivity, water resistivity, and the amount of total
dissolved solids (TDS). These relationships are used in the present research in order to follow the TDS salinity variations,
both in lateral and depth directions, along the longitudinal profile LP3, located in Khanasser Valley. Apparent salinity map
under this profile is established for Quaternary and Paleogene deposits, and boundaries of suitable areas for fresh water
well drilling in the totality of the Khanasser Valley are drawn. It was shown that excessive fresh-water depletion may affect
the groundwater quality by upward seepage of saline water. Therefore, it is important to keep the fresh-salt water interface
in a stationary situation. The geoelectrical methods widely contribute in determining the position of such interface, and
can be easily applied in similar arid areas. |
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