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Title: Application of drastic model and GIS: For assessing vulnerability in hard rock granitic aquifer
Authors: Prasad R.K.
Singh V.S.
Krishnamacharyulu S.K.G.
Banerjee, Pallavi
Published in: Environmental Monitoring and Assessment
Abstract: Geographic information system (GIS) has become one of the leading tools in the field of hydrogeological science that helps in assessing, monitoring, and conserving groundwater resources. Groundwater is a finite resource, which is being overexploited due to increase in demand over the years leading to decrease in its potentiality. In the present study, DRASTIC model has been used to prepare groundwater vulnerable zone in hard rock aquifer of granitic terrain. The main objective is to determine susceptible zone for groundwater pollution by integrating hydrogeological layers in GIS environment. The layers such as depth of aquifer, recharge, aquifer yield, soil type, topography, vadose zone, and transmissivity are incorporated in the DRASTIC model. The final output of the map shows that around 60% of the area falls under low to no risk of pollution zone. The high risk of pollution zones are mostly present towards the margin of southeastern periphery. The lower part of the basin as well as small area on northern side falls under moderate risk of pollution zone. For the assessment of groundwater pollution zone, 24 groundwater samples have been collected from different vulnerable zones. The chemical analysis of sample shows that the southeastern margin of basin has relatively high concentration of nitrate as compared to other parts of the basin. It is present in high pollution zone as well as moderate pollution zone. The present model can be used for assessment and management of groundwater. © 2010 Springer Science+Business Media B.V.
Citation: Environmental Monitoring and Assessment (2011), 176(43834): 143-155
Issue Date: 2011
Keywords: Aquifer
Hard rock
ISSN: 1676369
Author Scopus IDs: 57199315221
Author Affiliations: Prasad, R.K., NGRI (CSIR), Groundwater Building, Uppal road, Hyderabad 500007, India
Singh, V.S., NGRI (CSIR), Groundwater Building, Uppal road, Hyderabad 500007, India
Krishnamacharyulu, S.K.G., School of Earth Sciences, S.R.T.M. University, Vishnupuri, Nanded 431606, India
Banerjee, P., NGRI (CSIR), Groundwater Building, Uppal road, Hyderabad 500007, India
Funding Details: Acknowledgements Authors wish to thank the Director of NGRI, Hyderabad for his encouragement and permission to publish this paper, and CSIR for providing SRF fellowship to carry out the research work and scientist of CRIDA for sharing their data. The work has been financed by Indian National Committee on Irrigation and Drainage, Ministry of water Resources, Govt. of India.
Corresponding Author: Prasad, R. K.; NGRI (CSIR), Groundwater Building, Uppal road, Hyderabad 500007, India; email:
Appears in Collections:Journal Publications [ES]

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