Quantifying groundwater discharge from different sources into a Mediterranean wetland by using 222Rn and Ra isotopes

Methodological study of submarine groundwater discharge from a karstic aquifer in the Western Mediterranean Sea

“…1). In agreement with piezometry, the drainage of the aquifer fits with the coastal springs of Sierra de Irta and the coastal plain aquifers (Mejías et al, 2008;Rodellas et al, 2012).…”

“…Direct measurements of the Peñíscola spring outflow (from the karst aquifer and the drainage from the nearby marshland area) provided a maximum flow of 1156 L s À1 in May 2008 and a minimum flow of 394 L s À1 in September 2007, with a monthly variation typical of karst aquifers (Rodellas et al, 2012). The total discharge to the sea from this outflow between September 2007 and September 2008 was estimated as 20.2 Mm 3 .…”

The influence of sediment sources on radium-derived estimates of Submarine Groundwater Discharge

“…Most studies involving Ra isotopes as tracers of SGD have shown that inputs of Ra from seafloor sediments are often small in relation to the SGD source term (Beck et al, 2007;Charette et al, 2003;Garcia-Solsona et al, 2008b;Rama and Moore, 1996;Rodellas et al, 2012). Conversely, recent studies in shallow embayments with fine-grained sediments and/or affected by processes that favor Ra exchange across the sediment-water interface (e.g., bioirrigation, resuspension, hypoxia) have demonstrated that the sedimentary source can supply a relevant flux of Ra isotopes, which may be comparable to SGD-derived Ra inputs (Breier et al, 2009(Breier et al, , 2010Colbert and Hammond, 2008;Garcia-Orellana et al, 2014;Gleeson et al, 2013).…”

Measurement of submarine groundwater discharge using diverse methods in Coleroon Estuary, Tamil Nadu, India

“…Several SGD studies have been conducted to identify potential sources and interactions of nutrients in the Ocean (Corbett et al 1999(Corbett et al , 2000aDillon et al 1999;Top et al 2001). Agricultural development in near-shore areas, leading to increased inputs of nitrogen (N) and phosphorus (P) from fertilizer and wastewater has been attempted in different parts of the globe (Burnett 1999;Corbett et al 1999;Moore 1996Moore , 1999Valiela et al 1990) and role of micro nutrients like DIN, DIP and DSi in quantifying SGD (Slomp and Van Cappellen 2004;Knee and Paytan 2011;Garcia Solsona et al 2010;Rodellas et al 2012) has been discussed. A few studies have documented trace metal fluxes into the ocean associated with SGD (e.g., Beck 2007;Windom et al 2006).…”