Tracing groundwater salinization using geochemical and isotopic signature in Southeastern coastal Tamilnadu, India

被引：33
|
作者：
Gopinath, S. [1 ]
Srinivasamoorthy, K. [1 ]
Saravanan, K. [2 ]
Prakash, R. [1 ]
机构：
[1] Pondicherry Univ, Dept Earth Sci, Sch Phys Chem & Appl Sci, Pondicherry 605014, India
[2] Indian Inst Sci, Dept Civil Engn, Bengaluru 560012, Karnataka, India
来源：
CHEMOSPHERE | 2019年 / 236卷
关键词：
Coastal groundwater; Hydrochemistry; Isotopes; Thermodynamics; Statistical analysis; SEAWATER INTRUSION; NATURAL WATERS; AQUIFER; CHEMISTRY; QUALITY; CHLORIDE/BROMIDE; IDENTIFICATION; METAMORPHISM; EVOLUTION; RATIOS;
D O I：
10.1016/j.chemosphere.2019.07.036
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Attempt has been made to discriminate groundwater salinity causes along the east coast of India. A total of 122 groundwater samples (61/season) were collected for two diverse seasons (Pre Monsoon and Post Monsoon) and analyzed for physical and chemical components along with stable isotopes. The Piper diagram proposes samples along the coast predisposed by saltwater incursion. Ionic ratio plots recommend groundwater discriminatory by changing geochemical signatures. The statistical correlation suggests impact of saltwater incursion, anthropogenic and rock water interaction as sources for dissolved constituents in groundwater. The thermodynamic stability plot suggests higher silicate dissolution, weathering and ion exchange prompting water chemistry nevertheless of seasons. The delta O-18 and delta H-2 increases towards the sea suggesting enrichment attributed to the sea water influence and rainfall influences along the southwestern parts of the study area. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：14
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