Identification of Most Important Sources Controlling Groundwater Chemistry in Annamalai Nagar Cuddalore Taluk, Cuddalore District, Tamilnadu

Authors

  • Anandhan P  Department of Earth Sciences, Annamalai University, Annamalai Nagar
  • Chidambaram S  Research Scientist, Water Research Center, Kuwait institute for Scientific Research, Kuwait
  • Manivannan R  Department of Earth Sciences, Annamalai University, Annamalai Nagar
  • Paramaguru P  Department of Earth Sciences, Annamalai University, Annamalai Nagar
  • Devaraj N  Department of Earth Sciences, Annamalai University, Annamalai Nagar

Keywords:

Geochemistry, Permeability index, Major ions chemistry, Thermodynamic, Water quality

Abstract

A hydrogeochemical study was conducted in a coastal region of Cuddalore district to evaluate suitability of groundwater for domestic and agricultural purposes. Understanding the geochemical evolution is important for sustainable development of water resources. A detailed investigation was carried out to evaluate the geochemical processes regulating groundwater quality in Annamalinagar, Cuddalore taluk, Cuddalore district of Tamilnadu, India. To attain a panacea for water chemistry, groundwater samples were collected during the pre monsoon and post monsoon for two seasons. A total of 31 groundwater samples were collected in each season and were analyzed for 14 different water quality parameters and the result indicates, that higher EC and TDS values are observed in the central and SW part of the study area. In PRM and POM seasons HCO3 + Cl dominates the anions, with few representations for SO4. In both seasons Na+ K are the dominant ions. Bicarbonates derived from silicate mineral weathering are noted in the SW and Southern region. The electrical conductivity (EC) value ranged (both season) from 197 to 9190 μs/cm. As per Sodium Adsorption Ratio values 50% of the samples are suitable for irrigation. The Residual Sodium Carbonate indicates 60% of the samples fall in safe and 40% of the samples fall in unsafe zones and prolonged usage of this water will affect the crop yield. The Permeability Index of the groundwater indicates groundwater from the study area is moderate to good for irrigation purposes. Thermodynamic studies reveal that groundwater of the region are stable with Kaolinite stability field in all the silicate systems. Comparison of water quality to standards shows that the water can be used for drinking and for irrigation purposes except in few locations. Over exploitation of groundwater for extensive agricultural and urbanization has resulted in increase to the demand of fresh water and contamination of aquifer by salt water intrusion and other anthropogenic activities.

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International Journal of Scientific Research in Science and Technology

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Published

2017-06-13

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Volume 3, Issue 4, May-June-2017

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Research Articles

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[1]
Anandhan P, Chidambaram S, Manivannan R, Paramaguru P, Devaraj N, " Identification of Most Important Sources Controlling Groundwater Chemistry in Annamalai Nagar Cuddalore Taluk, Cuddalore District, Tamilnadu, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 3, Issue 4, pp.398-404, May-June-2017.