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Seasonal Changes and Hydrogeochemical Factors Influencing Groundwater Quality in Nannilam, Thiruvarur District of Tamil Nadu, India.

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Title: Seasonal Changes and Hydrogeochemical Factors Influencing Groundwater Quality in Nannilam, Thiruvarur District of Tamil Nadu, India.
Authors: Radhakrishnan, Ezhilarasan1 (AUTHOR), Ramasamy, Prabhakaran1 (AUTHOR) geoprabha26@gmail.com, Vellaisamy, Vasanthamohan2 (AUTHOR), Natesan, Devaraj1 (AUTHOR), Senapathi, Venkatramanan2 (AUTHOR) venkatramanan@nct.ac.in, Karthikeyan, Sivakumar3 (AUTHOR), Tinivella, Umberta (AUTHOR) utinivella@ogs.it
Source: Geofluids. 4/28/2026, Vol. 2026, p1-17. 17p.
Subject Terms: *Groundwater quality, *Water salinization, *Water chemistry, *Seasons, *Irrigation water quality
Geographic Terms: Tamil Nadu (India), India
Abstract: The purity of groundwater in Nannilam Taluk, which is situated in the Cauvery delta region of Tamil Nadu, India, is the primary focus of this investigation. In order to evaluate the physicochemical properties and efficacy of the groundwater for irrigation purposes, a total of 100 samples were collected from open wells, bore wells, and hand pumps during two distinct seasons (premonsoon and postmonsoon) in 2022. The samples were subjected to analyses for pH, electrical conductivity (EC), total dissolved solids (TDS), and main ions, including Ca2+,Mg2+,Na+,K+,Cl−, and HCO3−. The data were analyzed using a variety of geochemical indices, including the sodium adsorption ratio (SAR), residual sodium carbonate (RSC), and permeability index (PI). Furthermore, spatial and statistical analyses were implemented, particularly principal component analysis (PCA) and a correlation matrix. It indicates that 16% of premonsoon samples and 12% of postmonsoon samples were classified as brackish. The premonsoon period is characterized by seasonal fluctuations that suggest an increase in salinity. This phenomenon may be linked to human activities, degradation processes, and ion exchange. The groundwater generally meets the irrigation criteria; however, elevated sodium and salinity levels in certain regions may pose challenges. The study underscores the necessity of monitoring and management to guarantee the long‐term sustainability of groundwater in the region. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 193322434
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Seasonal Changes and Hydrogeochemical Factors Influencing Groundwater Quality in Nannilam, Thiruvarur District of Tamil Nadu, India.
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  Data: <searchLink fieldCode="AR" term="%22Radhakrishnan%2C+Ezhilarasan%22">Radhakrishnan, Ezhilarasan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ramasamy%2C+Prabhakaran%22">Ramasamy, Prabhakaran</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> geoprabha26@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Vellaisamy%2C+Vasanthamohan%22">Vellaisamy, Vasanthamohan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Natesan%2C+Devaraj%22">Natesan, Devaraj</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Senapathi%2C+Venkatramanan%22">Senapathi, Venkatramanan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> venkatramanan@nct.ac.in</i><br /><searchLink fieldCode="AR" term="%22Karthikeyan%2C+Sivakumar%22">Karthikeyan, Sivakumar</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tinivella%2C+Umberta%22">Tinivella, Umberta</searchLink> (AUTHOR)<i> utinivella@ogs.it</i>
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  Data: <searchLink fieldCode="JN" term="%22Geofluids%22">Geofluids</searchLink>. 4/28/2026, Vol. 2026, p1-17. 17p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Groundwater+quality%22">Groundwater quality</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+salinization%22">Water salinization</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+chemistry%22">Water chemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Seasons%22">Seasons</searchLink><br />*<searchLink fieldCode="DE" term="%22Irrigation+water+quality%22">Irrigation water quality</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Tamil+Nadu+%28India%29%22">Tamil Nadu (India)</searchLink><br /><searchLink fieldCode="DE" term="%22India%22">India</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The purity of groundwater in Nannilam Taluk, which is situated in the Cauvery delta region of Tamil Nadu, India, is the primary focus of this investigation. In order to evaluate the physicochemical properties and efficacy of the groundwater for irrigation purposes, a total of 100 samples were collected from open wells, bore wells, and hand pumps during two distinct seasons (premonsoon and postmonsoon) in 2022. The samples were subjected to analyses for pH, electrical conductivity (EC), total dissolved solids (TDS), and main ions, including Ca2+,Mg2+,Na+,K+,Cl−, and HCO3−. The data were analyzed using a variety of geochemical indices, including the sodium adsorption ratio (SAR), residual sodium carbonate (RSC), and permeability index (PI). Furthermore, spatial and statistical analyses were implemented, particularly principal component analysis (PCA) and a correlation matrix. It indicates that 16% of premonsoon samples and 12% of postmonsoon samples were classified as brackish. The premonsoon period is characterized by seasonal fluctuations that suggest an increase in salinity. This phenomenon may be linked to human activities, degradation processes, and ion exchange. The groundwater generally meets the irrigation criteria; however, elevated sodium and salinity levels in certain regions may pose challenges. The study underscores the necessity of monitoring and management to guarantee the long‐term sustainability of groundwater in the region. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=193322434
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1155/gfl/9936907
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Groundwater quality
        Type: general
      – SubjectFull: Water salinization
        Type: general
      – SubjectFull: Water chemistry
        Type: general
      – SubjectFull: Seasons
        Type: general
      – SubjectFull: Irrigation water quality
        Type: general
      – SubjectFull: Tamil Nadu (India)
        Type: general
      – SubjectFull: India
        Type: general
    Titles:
      – TitleFull: Seasonal Changes and Hydrogeochemical Factors Influencing Groundwater Quality in Nannilam, Thiruvarur District of Tamil Nadu, India.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Radhakrishnan, Ezhilarasan
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            NameFull: Ramasamy, Prabhakaran
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            NameFull: Vellaisamy, Vasanthamohan
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            NameFull: Natesan, Devaraj
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            NameFull: Senapathi, Venkatramanan
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            NameFull: Karthikeyan, Sivakumar
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            – D: 28
              M: 04
              Text: 4/28/2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 14688115
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            – Type: volume
              Value: 2026
          Titles:
            – TitleFull: Geofluids
              Type: main
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