GEOELECTRICAL INVESTIGATIONS FOR SHALLOW GROUND-WATER AT IARI FARM, NEW-DELHI

Vertical Electrical Sounding (VES) adopting Schlumberger configuration and profiling by Wenner configuration, were tarried out at 16 locatio ns and along two traverses, to assess the ground water potential zones and their continuity in a micro-watershed at IARI Farm, New Delhi. Fi ve geoelectric layers were identified within a depth of about 40m belo w ground level. VES data from two points were compared with the bore h ole litholog obtained from secondary data. Using the resistivity fence diagram and the geometry of the aquifer zone, approximate quantity of ground water under phreatic condition was computed. Chemical analyses of ground water samples indicated medium to slightly higher salinity and low alkali hazard, which could be grouped as C3S1 under USDA class ification of irrigation water quality.