Estimation of total Dissolved Solid in Ground Water of Tarai Area of Shahjahanpur, Bareilly and Pilibhit Districts, Uttar Pradesh

摘要

Tarai area of Ganga basin is a potential prospect for fresh ground water aquifer as it acquires fine/coarse sand beds under alluvium and Siwalik sediments. Deep electrical resistivity survey has demarcated fresh and saline water interfaces at deeper level. Unconfined shallower aquifer bears saline water whereas deeper confined aquifer contains potable water, underlain by thick zone of salinelbrackish water, Fresh and saline water have shown resistivities ranging from 20-45 Ohm-m and 2-10 Ohm-m respectively. The depth of the fresh and saline water interface has been interpreted as 1859m at Puranpur, 1944m at Shahjahanpur, 1050m at Baheri and 2600m at Nigohi. An analytical approach has been made to estimate the total dissolved solid in fresh water at deeper level, which falls between 150 and, 180 mg/lt ofNaCI equivalent at the aquifer temperature. Under the prevailing geohydrological conditions the incursion of saline, water into the fresh water-bearing horizon cannot be ruled out due to over drawal of grond water in the area. This poses geoenvironmental hazards with regard to ground water management in the tract.