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Unravelling SGD pathways in karst aquifer at Uvari coast of India using integrated geochemical and isotopic tracers

delete2026-08-10
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PRE
AI
S
Selvam Sekar *
B
Baalamurugan Arumugam
M
Muthukumar Perumal
P
Priyadarsi D. Roy
S
Sivakumar Muthu
N
Nandhakumar Sundaramoorthy
DOI：10.1016/j.marpolbul.2026.120206delete
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Abstract

Abstract

En 中文
• Fresh and recirculated SGD were evaluated using a combined geochemical approach. • Radon (222Rn), salinity–EC gradients, and nutrient fluxes served as key hydrogeochemical tracers. • Post- and pre-monsoon analyses reveal strong seasonal variability in SGD intensity. • Karstic conduits enhance focused groundwater discharge along the Tirunelveli coastline. • SGD-driven nutrient flux (DIN and DIP) plays a major role in coastal biogeochemical alteration.
Keywords:
Submarine groundwater discharge
Radon (222Rn) tracer
Nutrient flux in karst aquifer
Coastal hydrochemistry
Groundwater–seawater interaction
Tamil Nadu State
Subterranean estuary

Journal

Marine Pollution Bulletin cover
Marine Pollution Bulletin
IF:
4.9
Papers:
1.8W
Citations:
6.5W

Organization

A
academy of maritime education and training deemed to be university
Scholars:
9
Papers: 11
Citations: 0
C
ciudad universitaria
Scholars:
148
Papers: 63
Citations: 0
V
v.o. chidambaram college
Scholars:
26
Papers: 7
Citations: 0
C
Central Ground Water Board
Scholars:
2
Papers: 2
Citations: 114
Cited Papers

Cited Papers

Citing Papers

Citing Papers