Articles | Volume 20, issue 8
https://doi.org/10.5194/hess-20-3077-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/hess-20-3077-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Assessing land–ocean connectivity via submarine groundwater discharge (SGD) in the Ria Formosa Lagoon (Portugal): combining radon measurements and stable isotope hydrology
Carlos Rocha
CORRESPONDING AUTHOR
Biogeochemistry Research Group, Geography Department, School of
Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
Cristina Veiga-Pires
Biogeochemistry Research Group, Geography Department, School of
Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
CIMA-Marine and Environmental Research Center, Universidade do
Algarve, Portugal
Jan Scholten
Institute of Geosciences, University of Kiel, Germany
Kay Knoeller
UFZ, Helmholtz Centre for Environmental Research Leipzig/Halle,
Germany
Darren R. Gröcke
Department of Earth Sciences, Durham University, South Road, Durham,
County Durham, DH1 3LE, UK
Liliana Carvalho
Biogeochemistry Research Group, Geography Department, School of
Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
CIMA-Marine and Environmental Research Center, Universidade do
Algarve, Portugal
Jaime Anibal
Biogeochemistry Research Group, Geography Department, School of
Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
CIMA-Marine and Environmental Research Center, Universidade do
Algarve, Portugal
Jean Wilson
Biogeochemistry Research Group, Geography Department, School of
Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
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- Sandy seepage faces as bioactive nitrate reactors: Biogeochemistry, microbial ecology and metagenomics S. Jiang et al. 10.1016/j.gsf.2022.101529
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- Resolving groundwater sources to a coastal lagoon using major ions, nutrients and stable isotopes K. Coluccio et al. 10.1007/s12665-021-09880-4
- Hydrochemistry and isotopic signatures of subpermafrost groundwater discharge along the eastern slope of the Lena River Delta in the Laptev Sea A. Charkin et al. 10.1016/j.jhydrol.2020.125515
- Quantification of groundwater discharge into a shallow coastal lagoon applying a multi-tracer approach M. Schubert et al. 10.1007/s10661-023-11244-3
- Groundwater discharge locally shapes the rocky shore macroinvertebrate community in South-Southwest Portugal L. Julián E et al. 10.1016/j.marenvres.2022.105672
- Characterization of seasonal groundwater origin and evolution processes in a geologically heterogeneous catchment using geophysical, isotopic and hydro‐chemical techniques (Lough Gur, Ireland) D. O'Connell et al. 10.1002/hyp.14706
- Science, society, and the coastal groundwater squeeze H. Michael et al. 10.1002/2017WR020851
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- Physical and chemical characterization of remote coastal aquifers and submarine groundwater discharge from a glacierized watershed A. Russo et al. 10.1002/hyp.15240
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- Nitrogen enrichment and speciation in a coral reef lagoon driven by groundwater inputs of bird guano A. McMahon & I. Santos 10.1002/2017JC012929
- Karstic submarine groundwater discharge into the Mediterranean: Radon-based nutrient fluxes in an anchialine cave and a basin-wide upscaling X. Chen et al. 10.1016/j.gca.2019.08.019
- Geochemical tracers in submarine groundwater discharge research: practice and challenges from a view of climate changes S. Jiang et al. 10.1139/er-2020-0093
- Conceptual uncertainties in groundwater and porewater fluxes estimated by radon and radium mass balances V. Rodellas et al. 10.1002/lno.11678
- Anthropogenic activities alter the hydrological process of submarine groundwater discharge in a coastal area of Shanghai City, China D. Li et al. 10.1016/j.jhydrol.2024.130996
- Submarine groundwater discharge: An Asian overview S. Sajeev et al. 10.1016/j.chemosphere.2023.138261
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- Rethinking tracer-based (Ra, Rn, salinity) approaches to estimate point-source submarine groundwater discharge (SGD) into coastal systems M. Savatier & C. Rocha 10.1016/j.jhydrol.2021.126247
- Fresh and saline submarine groundwater discharge in a large coastal inlet affected by seasonal upwelling J. Ibánhez et al. 10.1002/lno.11733
- Hydrogeological effects of dredging navigable canals through lagoon shallows. A case study in Venice P. Teatini et al. 10.5194/hess-21-5627-2017
- Are submarine groundwater discharges affecting the structure and physiological status of rocky intertidal communities? D. Piló et al. 10.1016/j.marenvres.2018.02.013
- The effects of subterranean estuary dynamics on nutrient resource ratio availability to microphytobenthos in a coastal lagoon C. Rocha et al. 10.1016/j.scitotenv.2022.157522
- Behavior of Li, S and Sr isotopes in the subterranean estuary and seafloor pockmarks of the Hanko submarine groundwater discharge site in Finland, northern Baltic Sea J. Ikonen et al. 10.1016/j.apgeochem.2022.105471
- Radioactive and stable isotope measurements reveal saline submarine groundwater discharge in a semiarid estuary C. Lopez et al. 10.1016/j.jhydrol.2020.125395
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- A place for subterranean estuaries in the coastal zone C. Rocha et al. 10.1016/j.ecss.2021.107167
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Saved (preprint)
Latest update: 13 Dec 2024
Short summary
We combine radon and stable isotopes in water to determine total submarine groundwater discharge (SGD) in the Ria Formosa and discriminate its component modes. We show that tidal action filters the entire water volume in the lagoon through local beaches 3.5 times a year, driving an estimated 350Ton nitrogen/year into the system. Conversely, fresh groundwater is discharged into the lagoon only occasionally, adding ~ 61 Ton nitrogen/year, but is capable of driving new production in the system.
We combine radon and stable isotopes in water to determine total submarine groundwater discharge...