Assessment of ground water in a coastal village of West Bengal using geo-electrical method
Vertical Electrical Sounding (VES) assuming Schlumberger configuration were carried out in 12 locations in a sea water inundated village (Kanthalberia) of Coastal West Bengal. Two vertical sections across the river Matla (VED 1’-4’ ans VED 5’-8’) were also carried out. Ground water samples from nearby tube well (of VES points) were also collected . Five geo-electrical layers were found out in the area within a depth of 90 m below ground level. The inter relationship between longitudinal unit conductance (S) and EC of ground water samples showed that EC values increased linearly with S values. S values were positively correlated with EC2 of soil samples. The transverse unit resistance (T) was negatively correlated with EC2 of soil. Chemical analysis of ground water samples showed that the quality of water was good with low salinity and low alkali hazard and could be grouped as C3S1 of USDA irrigation water quality classification.
Keywords: VES, ground water, USDA
