Impact of monsoon shower on the hydrogeochemistry of groundwater along the lithological contact: a case study from South India

Natesan, Devaraj; Chidambaram, S.; Kamaraj, Pradeep; Mathivanan, Mahalakshmi; Haji, Muhammed; Prasanna, Mohan Viswanathan; Chandrasekaran, Thivya; Rajendran, Thilagavathi

doi:10.1007/s13201-021-01538-7

Cited by 13 publications

(1 citation statement)

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“…Total hardness has a strong positive correlation with Ca, Mg, K, Cl, and CO 3 , which indicates that the sources of hardness is due to Ca-Cl, Mg-Cl, K-Cl, Ca-CO 3 , and Mg-CO 3 in the summer season. The linear relationship of K with hardness is weak in the winter season due to the formation of freshwater aquifers in the monsoon period and further K has a lesser value due to their mobility or ion exchange process (Natesan et al 2022). The correlation between hardness and TDS is positive because of both permanent and temporary hardness, which are due to the sources of Ca-Cl, Mg-Cl, Ca-CO 3 , and Mg-CO 3 .…”

Section: Correlation Analysis Of Hydrochemical Parametersmentioning

confidence: 99%

Hydrogeochemical and multivariate statistical approaches to investigate the characteristics of groundwater quality in fluoride-enriched hard rock region in Tirupathur district of Tamil Nadu, India

Nagaraj,

Masilamani

2023

Environ Sci Pollut Res

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Fluoride pollution is a major issue worldwide, posing health risks such as dental and skeletal uorosis. This study was conducted in uoride enrichment hard rock regions of Vaniyambadi and Ambur talks in Tirupathur district, Tamilnadu. 480 groundwater samples were collected from May 2021 to April 2022 and grouped as Summer, Southwest monsoon, Northeast monsoon, and Winter. Maximum concentration of uoride was found to be 4 mg/L in the summer season in Vellakuttai region of Vaniyambadi taluk. The spatial distribution of uoride in groundwater during the monsoon season indicates that it is mostly leached from uoride-bearing minerals. The study aims to investigate the hydrogeochemical process and mechanism in uencing groundwater chemistry. The Piper and Gibbs diagrams has been carried out to illustrate the rock-water interaction and anthropogenic sources that contribute to the NaHCO 3 and NaCl-type waters, respectively. Multivariate statistical analysis such HCA, PCA, MLR and SEM has been carried out to determine the groundwater quality. HCA analysis manifests the nature and sources of groundwater through Q-mode and R-mode analysis. PCA plays a role in eliminating the factors that associates with TDS for better development of the MLR model. The results of the MLR model provides higher accuracy in detecting the contamination factors associated with the environment and natural rocks. SEM revealed the goodness of t indices, that con rms the variation in regional groundwater quality caused by various physicochemical characteristics. This study also aims to provide the con rmation of exploratory data analysis in groundwater quality using structural equation modeling. IntroductionGroundwater is the main source of fresh water in arid and semi-arid regions and is used for domestic, agricultural, and industrial activities. One-third of the worldwide population depends upon groundwater (Choubin et al. 2019;Li et al. 2021). Groundwater contamination majorly occurs due to anthropogenic and geogenic activities. The two inorganic ions arsenic and uoride in groundwater due to geogenic formation were identi ed as deleterious to human health. Of which uoride plays a dominant role than arsenic (Sajil Kumar et al. 2014). The range of uoride in groundwater, surface water, and seawater is 67 mg/L, < 0.1 mg/L, and 1.2-1.4 mg/L respectively (Yadav et al. 2019). According to World Health Organization, the permissible limit of uoride concentration in drinking water is not more than 1.5 mg/L (WHO 2022). The presence of uoride in drinking water reduces dental decay but an excessive level can lead to dental and skeletal uorosis, stooped backs, crooked hands and legs, blindness (Ayoob and Gupta 2006;Guissouma et al. 2017; Yadav et al. 2019). Due to activities such as the use of fertilizers in agricultural activity, industrial discharges, and municipal waste on land lls groundwater gets contaminated with uoride content. Other than anthropogenic activities uoride enters into groundwater through the dissolution of the hard rock region, which has compl...

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Section: Correlation Analysis Of Hydrochemical Parametersmentioning

confidence: 99%