Proceedings of the International Academy of Ecology and Environmental Sciences, 2013, 3(2): 148-159 IAEES www.iaees.org Article Assessment of impact on the groundwater quality due to urbanization by hydrogeochemical facies analysis in SE part of Pune city, India M. R. G. Sayyed 1 , G. S. Wagh 2 , A. Supekar 3 1 Department of Geology, Poona College, Camp, Pune 411 001, India 2 Department of Chemistry, S. P. College, Lonand, Tal. Khandala, Dist. Satara 415521, India 3 Department of Geology, University of Pune, Pune 411 007, India E-mail: mrgsayyed@yahoo.com Received 12 February 2013; Accepted 15 March 2013; Published online 1 June 2013 Abstract The groundwater from the south-eastern part of Pune city has been assessed for the seasonal variation in their quality parameters. Using Piper diagram the hydrogeochemical facies were identified and the groundwaters were classified with regards to the changes in their major chemical compositions. Based on the hydrogeochemical facies it has been found that the groundwater regime is severly deteriorated by the anthropogernic activities. Although the area of Manjari, Hadapsar and uruli Devachi show high influx of pollutants in rainy season the Mantarwadi and Fursungi area have strong influence of leachate throughout the year. Keywords groundwater; hydrogeochemical facies; Piper diagram; pollution. 1 Introduction Dissolved major elements in the water generally express the intensity of water-rock interactions in the area as they play important role in the study of chemical weathering rates (Meybeck, 2003). Although several sources contribute to the dissolved contents of groundwater the major elements released via various sources are used as proxies for weathering rates for which the identification of their different origins is required (Drever, 2005). Since the factors controlling the chemical composition of water have been primarily related to the composition of the soils and rocks, studies comprehending the hydrogeochemical processes operating in the given geological and geochemical regimes were initiated by many workers (Drever, 1982; Velbel, 1985; Schott and Berner, 1985; Katz and Choquette, 1991; Pawar, 1993; Drever and Clow, 1995). Although the dissolved constituents in groundwater are primarily controlled by the original chemical characters and temperature of the water entering the zone of saturation; the distribution, solubility and exchange capacity of minerals in the rock; the porosity and permeability of the aquifer and the flow path ways of the water (Back and Hanshaw, 1965; Freeze and Cherry, 1979; Appelo and Postma, 1996; Mazor, 1997 etc.) the geological formations, water-rock Proceedings of the International Academy of Ecology and Environmental Sciences ISSN 22208860 URL: http://www.iaees.org/publications/journals/piaees/onlineversion.asp RSS: http://www.iaees.org/publications/journals/piaees/rss.xml Email: piaees@iaees.org EditorinChief: WenJun Zhang Publisher: International Academy of Ecology and Environmental Sciences