Abstract
The groundwater vulnerability has become a major problem in most of the countries which are growing at a faster pace. The DRASTIC model is the most widely adopted method to assess the groundwater vulnerability to contamination in most studies and has also been implemented in the present study which has been conducted in a small watershed of Palamu, Jharkhand, India. The study showed that the DRASTIC index lies in the range of 79 to 160 which were classified into four zones, viz., low-, moderate-, high-, and very high-risk zone of groundwater contamination. The groundwater vulnerability map showed that about 31 and 24 % of the study area lie between high risk to very high risk of groundwater pollution and 16 and 28 % of the study area are occupied by moderate risk to low risk of pollution zone, respectively. The use of Geographic Information System (GIS) facilitated the preparation of the thematic layers to be overlaid in the GIS environment to obtain the risk zones spatially.
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