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Groundwater vulnerability assessment using GIS-based DRASTIC model in the upper catchment of Dwarakeshwar river basin, West Bengal, India

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Title Groundwater vulnerability assessment using GIS-based DRASTIC model in the upper catchment of Dwarakeshwar river basin, West Bengal, India
Not Available
 
Creator Baisakhi Chakraborty
Sambhunath Roy
Amit Bera
Partha Pratim Adhikary
Debashish Sengupta; Gouri Sankar Bhunia; Pravat Kumar Shit
 
Subject Contamination, DRASTIC, GIS, Groundwater vulnerability, Statistical analysis, Upper Dwarakeshwar
 
Description Research article
In the recent years, ground water vulnerability or more specifically contamination of unconfined aquifer has been intensified
due to multiple reasons. A GIS-based DRASTIC model was used for assessment of groundwater vulnerability on upper
Dwarakeshwar river basin, India. Seven intrinsic hydro-geological parameters like depth of water table, net recharge, aquifer
media, soil media, topography, the impact of vadose zone and hydraulic conductivity were considered to assess the magnitude
of vulnerability. Different weights and ratings were assigned according to their relative significance and successfully running
of the model. Data were collected from 34 different locations within the basin and DRASTIC Vulnerability Index (DVI)
was applied to identify the ground water vulnerable zones. DVI values show the range from 90 to 170 and it was classified
into five zones such as very low, low, moderate, high, and very high, respectively. Here, ArcGIS 10.4 software was used to
design the various digital thematic maps. The GIS analysis shows that around 1.18%, 11.87%, 60.93%, 23.41%, and 2.61%
areas fall under very low, low, moderate, high, and very high vulnerable zones respectively. Statistical analysis such as single
parameter sensitivity analysis and map removal sensitivity analysis show that the depth of water table is the most sensitive
parameter for groundwater contamination in the study area. Validation of this model was checked by K+
concentration in the
groundwater sample of the study area which indicates very high correlation (R2 = 0.94) with the DRASTIC vulnerable zones.
The overall analysis indicates that the near-surface aquifers are most vulnerable to the contamination in upper Dwarakeshwar
river basin area. This scientific study will definitely assist to the regional planners and policy makers for sustainable ground
water development and management.
Not Available
 
Date 2024-02-09T11:40:17Z
2024-02-09T11:40:17Z
2021-12-10
 
Type Article
 
Identifier Not Available
1866-6299 (Online)
http://krishi.icar.gov.in/jspui/handle/123456789/81339
 
Language English
 
Relation Not Available;
 
Publisher Springer