TY - JOUR
T1 - Assessment of hydrogeochemical characteristics and saltwater intrusion in selected coastal aquifers of southwestern India
AU - Akshitha, Vignesh
AU - Balakrishna, Keshava
AU - Udayashankar, Harikripa Narayana
N1 - Funding Information:
The first author acknowledges the Manipal Academy of Higher Education (MAHE) for providing Dr. T.M.A. Pai PhD fellowship (MAHE/DREG/MAHESCHOLAR/PHD/2018 dated 9th June 2018). The authors are thankful to Mr. Vignesh Shenoy B for his help during the fieldwork. This work is indeed supported by Manipal Academy of Higher Education through the fellowship no. MAHE/DREG/MAHESCHOLAR/PHD/2018. This is mentioned in Acknowledgments section. We did not find any specific head for the funding.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12
Y1 - 2021/12
N2 - The principal objective of this study is to assess the saltwater intrusion and hydrogeochemical processes that affect groundwater geochemistry in the coastal aquifers of southwestern India. Groundwater samples were collected seasonally and the physico-chemical parameters determined on-site. Major ions were determined in the laboratory. Hydrochemical diagrams, ionic ratios, and multivariate statistical analysis were adopted for understanding the groundwater chemistry. Gibbs plot identified that rock-water interaction and evaporation were the mechanisms regulating hydrogeochemistry. Ionic ratios have shown that coastal wells were contaminated with saltwater intrusion during the pre-monsoon season. Hierarchical cluster analysis classified the samples based on their quality; sample clusters with high NO3− were in densely populated areas, whereas sample clusters with moderate salt content in the coastal areas. Another cluster showed high concentrations of salts, typically the zones of saltwater intrusion. The study concludes that influence of seasons, geogenic and anthropogenic factors contribute to the heterogeneous chemistry of groundwater.
AB - The principal objective of this study is to assess the saltwater intrusion and hydrogeochemical processes that affect groundwater geochemistry in the coastal aquifers of southwestern India. Groundwater samples were collected seasonally and the physico-chemical parameters determined on-site. Major ions were determined in the laboratory. Hydrochemical diagrams, ionic ratios, and multivariate statistical analysis were adopted for understanding the groundwater chemistry. Gibbs plot identified that rock-water interaction and evaporation were the mechanisms regulating hydrogeochemistry. Ionic ratios have shown that coastal wells were contaminated with saltwater intrusion during the pre-monsoon season. Hierarchical cluster analysis classified the samples based on their quality; sample clusters with high NO3− were in densely populated areas, whereas sample clusters with moderate salt content in the coastal areas. Another cluster showed high concentrations of salts, typically the zones of saltwater intrusion. The study concludes that influence of seasons, geogenic and anthropogenic factors contribute to the heterogeneous chemistry of groundwater.
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U2 - 10.1016/j.marpolbul.2021.112989
DO - 10.1016/j.marpolbul.2021.112989
M3 - Article
AN - SCOPUS:85115615179
SN - 0025-326X
VL - 173
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
M1 - 112989
ER -