Rajesh Kanna Andiyappan

About

Hydrogeologist specialising in coastal groundwater systems, with a primary research focus on submarine groundwater discharge (SGD) and seawater intrusion (SWI). My work integrates hydrogeochemical analyses—including major ions, nutrients, trace elements (TEs), and rare earth elements (REEs)—to elucidate geochemical evolution, mixing processes, and salinisation pathways within coastal aquifers.

I employ isotopic tracers, particularly radon and radium, to quantify SGD fluxes and constrain groundwater residence times. My research further incorporates groundwater flow modelling and electrical resistivity surveys to delineate fresh and saline water interfaces, characterise groundwater–seawater interactions, and assess aquifer vulnerability.

Through multidisciplinary and process-based approaches, I seek to advance understanding of coastal aquifer dynamics, nutrient transport to marine environments, and the impacts of salinisation under evolving climatic and anthropogenic pressures.

Employment

• Pondicherry University JRF/Project Staff
  2019 - 2021

Education

• Pondicherry University PhD.
  2021 - Present
• Pondicherry University MTech., (Exploration Geoscience)
  2016 - 2018
• National College Autonomous MSc.,
  2014 - 2016
• Government Arts College (Autonomous) Bsc.,
  2011 - 2014

Projects & Funding

Projects & funding information is unavailable.

Publications (10)

• Decoding nutrient dynamics in coastal aquifers: Machine learning insights into submarine groundwater discharge and seawater intrusion in south India
  Chemosphere 2025 DOI: 10.1016/j.chemosphere.2025.144521
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• Understanding the impact of climate-induced sea level rise on groundwater inundation in a low-lying coastal area: A numerical simulation in Southeast India
  Regional Studies in Marine Science 2024 DOI: 10.1016/j.rsma.2024.103401
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• Simulation of the impact of sea level rise groundwater flooding along the south-eastern coast of India
  Urban Climate 2023 DOI: 10.1016/j.uclim.2023.101732
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• Groundwater and pore water inputs to the Bay of Bengal supported by geochemical tracers: Example from Tamil Nadu and Pondicherry, East Coast of India
  Chemosphere 2023 DOI: 10.1016/j.chemosphere.2023.139327
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• An investigation of Submarine Groundwater Discharge and related fluxes in parts of the southeast coast of India: combined Radon and Nutrients mass balance approach
  Total Environment Research Themes 2023 DOI: 10.1016/j.totert.2023.100050
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• Hydrogeochemical characteristics and risk evaluation of potential toxic elements in groundwater from Shanmughanadhi, Tamilnadu, India
  Environmental Research 2022 DOI: 10.1016/j.envres.2021.112199
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• Radon isotopes as tracers for submarine groundwater discharge and associated nutrient and rare earth elements inputs to the Sankarabarani river basin, India
  Groundwater Contamination in Coastal Aquifers 2022 DOI: 10.1016/b978-0-12-824387-9.00012-8
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• Investigation of Submarine Groundwater Discharge using Thermal Satellite and Radon mapping along the East Coast of the Tamil Nadu and Pondicherry Region, India
  International Journal of Civil, Environmental and Agricultural Engineering 2021 DOI: 10.34256/10.34256/ijceae2111
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• Estimating groundwater inputs from Sankarabarani River Basin, South India to the Bay of Bengal evaluated by Radium (226Ra) and nutrient fluxes
  International Journal of Civil, Environmental and Agricultural Engineering 2020 DOI: 10.34256/ijceae2022
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• Assessment of Radon in groundwater and associated human risk from Sankarabarani River Sub Basin, Southern India
  International Journal of Civil, Environmental and Agricultural Engineering 2019 DOI: 10.34256/ijceae1912
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