Geoelectrical Investigations for Shallow Ground Water in a Canal Command of Orissa

摘要

Sixteen Vertical Electrical Soundings (VES) of Schlumberger configuration and two profiles of Wenner configuration respectively were laid out in three different villages covering an area of approximately 410 ha in Balipatna canal command of Orissa. Five geoelectric layers were found in the area within a depth of 40 m below ground level. VES data from two points were compared with bore hole data to assign resistivity values to different strata. Using resistivity fence diagram the quantity of ground water under shallow aquifer was computed to be around 12.2 ha-m. Chemical analysis of ground water samples showed that the quality of ground water was good with low salinity and low alkali hazard and could be grouped as C_1S_1 under USDA irrigation water quality classification.