2009
DOI: 10.1007/s10533-009-9368-y
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An assessment of karstic submarine groundwater and associated nutrient discharge to a Mediterranean coastal area (Balearic Islands, Spain) using radium isotopes

Abstract: Short and long-lived radium isotopes (Ra-223, Ra-224, Ra-226, Ra-228) were used to quantify submarine groundwater discharge (SGD) and its associated input of inorganic nitrogen (NO3 (-)), phosphorus (PO4 (3-)) and silica (SiO4 (4-)) into the karstic Alcalfar Cove, a coastal region of Minorca Island (Western Mediterranean Sea). Cove water, seawater and groundwater (wells and karstic springs) samples were collected in May 2005 and February 2006 for radium isotopes and in November 2007 for dissolved inorganic nut… Show more

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Cited by 60 publications
(35 citation statements)
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“…A Ra isotope mass-balance model (21)(22)(23)(24) for the surf zone was used to estimate the volume of ocean water that exchanges with the beach aquifer on a daily basis. In the model, we assume that submarine groundwater discharge is the only source of Ra to the surf zone and that this source is balanced by Ra loss due to decay and mixing.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…A Ra isotope mass-balance model (21)(22)(23)(24) for the surf zone was used to estimate the volume of ocean water that exchanges with the beach aquifer on a daily basis. In the model, we assume that submarine groundwater discharge is the only source of Ra to the surf zone and that this source is balanced by Ra loss due to decay and mixing.…”
Section: Resultsmentioning
confidence: 99%
“…Submarine groundwater discharge was estimated for Iwasawa, Yotsukura, Karasuzaki, and Nakoso beaches, and was based on samples collected in 2015 and for Yotsukura beach in 2016 when both offshore and surf zone seawater Ra isotope data were available. The model assumes (i) that the system is at steady state, which is a fair assumption due to the fast production rate of shortlived radium isotopes (40); (ii) that submarine groundwater discharge is the primary source of Ra to the surf zone (23,24), in other words, that diffusion from sediments is negligible, which we think is satisfied given the high-energy surf zone (41,42); and (iii) that this input is balanced by the loss of Ra due to decay and mixing (ref. 22 and Eq.…”
Section: Methodsmentioning
confidence: 99%
“…This aquifer, named Migjorn, supplies most of the total extracted water from the island (~11 · 10 6 m 3 ·yr − 1 ), mainly for tourism and agriculture purposes (Garcia-Solsona et al, 2010a). The aquifer permeability increases towards the coastline as a consequence of a major karstic development that results in direct or diffuse groundwater discharge to the sea (Fayas, 1972).…”
Section: Field Sitementioning
confidence: 99%
“…However, in karstic regions, which frequently exhibit high permeability and reduced surface drainage capabilities, SGD is primarily composed of terrestrial freshwater (Garcia-Solsona et al, 2010b;Weinstein et al, 2011). SGD has been acknowledged as a significant source of nutrients to coastal waters (Slomp and Van Cappellen, 2004;Paytan et al, 2006;Garcia-Solsona et al, 2010a;Einsiedl, 2012;Rodellas et al, 2014) as well as being a source of trace metals and contaminants (Boehm et al, 2004;Windom et al, 2006;Beck et al, 2007); as such, SGD has become a topic of substantial research interest (Moore, 2010). SGD research has traditionally been focussed on coastal areas of North America, Australia, Japan and the Mediterranean Sea (Taniguchi et al, 2002).…”
Section: Introductionmentioning
confidence: 99%