A GIS based DRASTIC model for assessing groundwater vulnerability of Katri Watershed, Dhanbad, India

Abstract

Groundwater vulnerability assessment could be defined as the degree of assimilation capacity of the area to the contaminant from surrounding surface above the aquifer. It has become an important element for sustainable natural resource management and proper landuse planning. This study aims at estimating shallow aquifer vulnerability by applying the GIS based DRASTIC model in Katri watershed, Dhanbad, Jharkhand. The probable groundwater quality decline due to various anthropogenic activities within the Katri watershed has necessitated this study using a combination of DRASTIC and GIS method as an effective method for groundwater pollution risk assessment. This model is based on the seven hydrogeological data layers that provide the input to the modelling. It corresponds to the initials of seven layers i.e. Depth of water, net Recharge, Aquifer media, Soil media, Topography, Impact of vadose zone and hydraulic Conductivity. The mapping of the DRASTIC index allows us to delineate zones with various degrees of pollution vulnerability. The study reveals that about 16.91 % of the watershed area is exposed to high-risk, 30.69 % exposed to medium-risk, and 52.4 % exposed to low risk. The south eastern and south western parts of the watershed are dominated by high vulnerability classes while the south, north western and lower middle portions are characterized by moderate vulnerability classes. The elevated northern, north eastern, and middle part of the study area displayed low aquifer vulnerability.

Groundwater vulnerability assessment in degraded coal mining areas using the AHP–Modified DRASTIC model

“…The five geologic formations are Barren Measures (fine grain sandstone), Barakar Beds (coarse and medium sandstone and grit shale), Talchir Formation (gneiss shale and sandstone), Archean Gneiss (metamorphic gneiss and schist), and Raniganj Stage (igneous aquifers and granite gneiss). The geological map was hand digitised in ArcGIS environment, converted into raster format, and reclassified according to their relative rates (consistent with Ghosh, Tiwari, & Das, ; Table ; Figure c).…”

Hydrogeochemical analysis and evaluation of surface water quality of Pratapgarh district, Uttar Pradesh, India

“…Geographical information system (GIS) is a powerful tool for developing solutions for water resource problems, assessing water quality, determining water availability, zone mapping and risk assessment on environmental health problems on a local to regional scale (Tjandra et al 2003;Ghosh et al 2015). GIS is widely used for collecting diverse spatial data and for overlay analysis in spatial register domain to represent spatially variable phenomena (Bonham-Carter 1996;Gupta and Srivastava 2010).…”

Assessment and Estimating Groundwater Vulnerability to Pollution Using a Modified DRASTIC and GODS Models (Case Study: Malayer Plain of Iran)

“…The socioeconomic development of a region predominantly depends on the availability of good quality water. Groundwater vulnerability assessment could be defined as the degree of assimilation capacity of the area to the contaminant from surrounding surface above the aquifer [1]. Groundwater pollution is a universal problem.…”

“…GIS can be useful for taking quick decisions as graphical representation would be easy to take a policy decision by the makers [7]. GIS techniques have been becoming the most commonly used platform for assessment of groundwater vulnerability [1]. Several methods have been developed, throughout the world, to assess groundwater vulnerability.…”