Evaluation of groundwater vulnerability in the lower Varuna catchment area, Uttar Pradesh, India using AVI concept
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Groundwater vulnerability assessments calculate the sensitivity of quality of groundwater to an imposed contaminant load which is essential element of the aquifer management plans. Seventy five groundwater samples have been analyzed for different chemical parameters to understand the groundwater quality of the lower Varuna river basin, Uttar Pradesh, India. The intrinsic groundwater vulnerability map of the lower Varuna catchment area in the north of the city of Varanasi (India) shows a high dependency on the depth to groundwater. The topmost layer of alluvial silty clay, protects the groundwater against contamination in this urban area, but the retention time in the unsaturated zone can be estimated to several months only. The input dataset is very sparse i.e. groundwater levels were measured twice (pre- and post-monsoon 2009) and the geological map shows only alluvium as the outcrop. Several boreholes in this area show, that the alluvium has a thickness of about 4 m and below that are fine grained sands. The surface information does not allow the development of a risk map since land use changes very fast and contamination areas can not be identified accurately. The vulnerability maps developed in this study have become important tools for environmental planning and predictive management of the groundwater resources in the fast urbanizing region in the Varanasi area.
KeywordsGroundwater quality Aquifer Vulnerability Index Varuna river Varanasi Uttar Pradesh
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- Aller, L., Bennett, T., Lehr, J.H., Petty, R.J. and Hackett, G. (1987) DRASTIC: A standardized system for evaluating groundwater pollution potential using hydrogeologic settings. NWWA/EPA Series EPA-600/2-87-035.Google Scholar
- Civita, M. (1993). Groundwater vulnerability maps: a review. In: Proc. IX symposium on pesticide chemistry “degradation and mobility of xenobiotics”, Placenza, Italy, October 11–13, 1993, Edizioni “Biagini” Lucca, Italy, pp.587–631.Google Scholar
- Hölting, B., Haertle, T., Hohberger, K.H., Nachtigall, K.H., Villinger, E., Weinzierl, W. and Wrobel, J.P. (1995) Konzept zur Ermittlung der Schutzfunktion der Grundwasserüberdeckung. — Geol. Jb., C 63: 5–24, Hannover.Google Scholar
- Kachi, S., Kherici, N. and Kachi, N. (2007) Vulnerability and pollution risks in the alluvial aquifer of Tebessa-Morsott.Amer. Jour. Environ. Sci., v.3(4), pp.218–223.Google Scholar
- Margat, J. (1968) Vunerabilite des nappes d’eau souterraine a la pollution (vulnerability of groundwater to pollution) Orleans, France: BRGM Publication 68 SGL 198 HYD.Google Scholar
- Naidu, M.N., Srinivas, N. and Prasada Rao, P.V. (1998) Urban water quality in north coastal Andhra Pradesh. India Jour. Environ. Protec., v.18(4), pp.273–277.Google Scholar
- Ouyang, Y. (2005) Evaluation of river water quality monitoring stations by principal component analysis. Water Resour., v.39, pp.2621–2635.Google Scholar
- Pandey, D.S. (1993) Groundwater pollution studies in urban settlements of Varansi city, UP. Annual work programme report — 1992–1993. Central Groundwater Board, Allahabad, 35 p.Google Scholar
- Ram, P. (2010) Hydrogeological investigation with emphasis on groundwater pollution in lowr Varuna River basin, Varanasi district, Uttar Pradesh, India. Doctoral Thesis, 213 p.Google Scholar
- Thornthwaite, C.W. (1948) Report of the committee on evaporation and transpiration, 1943–1944. Transactions, v.25, pp.683–693.Google Scholar
- Vrba, J. and Zaporozec, A. (1994) Guidebook on Mapping Groundwater Vulnerability. In: International Association of Hydrogeologists (IAH)/International contributions to Hydrogeology, Vol 16, Hannover: Verlag Heinz Heise 131 pp.Google Scholar