地球科学与气候变化杂志

抽象的

Assessment of Groundwater Strata by Resistivity Survey at Specific Locations in District Buner

Zia Ullah1,*, Muhammad Junaid1 and Ruh Ullah2

The research study was conducted to assess the ground water strata by utilization of resistivity survey in selected locations of district Buner on the basis of accessibility. The main objectives of the study were to assess depth and thickness of groundwater strata and development of relationship between strata properties and resistivity. Four locations were selected in Hisar village, Amnawar sangara village and Amnawar mirdara village. The standard Schlumberger electrode configuration was adopted with maximum current electrode (AB/2) spacing of 300 m and potential electrode (MN/2) spacing of 20 m. The data was recorded using ABEM Terrameter SAS 4000. Analysis of data was achieved using 1X1D software having principal of conventional theory of curve matching. Various layers of different depths and thicknesses were identified. The depth of water table for Hisar village site-1 was 35 m with respect to ground surface; 30 m in Hisar village site-2 is shallowest one with respect to ground surface in all four locations and the deepest one in Amnawar sangara village having 47 m depth with respect to ground surface. The depth of Amnawar mirdara is 44 m with respect to ground surface in permeable layers of sandy clay and sandy gravel. Relationship of strata and resistivity was developed on the basis of resistivity values and strata were selected from standard table of geological materials. The predicted data was also compared with existing well logs for calibration and validation which was in good match. The major strata predicted in Hisar village were clay, sand clay, sand and gravel and lateritic. In Amnawar sangara and Amnawar mirdara villages the dominant media was sand and gravel while clay, sand stone and lateritic soil was also observed. Study should be conducted in water scarce areas with low water table areas to save huge amount of labor, energy and time.