TY - JOUR
T1 - Contribution of groundwater discharge to the coastal dissolved nutrients and trace metal concentrations in Majorca Island
T2 - Karstic vs detrital systems
AU - Tovar-Sánchez, Antonio
AU - Basterretxea, Gotzon
AU - Rodellas, Valentí
AU - Sánchez-Quiles, David
AU - García-Orellana, Jordi
AU - Masqué, Pere
AU - Jordi, Antoni
AU - López, José M.
AU - Garcia-Solsona, Ester
N1 - Publisher Copyright:
© 2014 American Chemical Society.
PY - 2014/10/21
Y1 - 2014/10/21
N2 - Submarine groundwater discharge (SGD) and derived nutrient (NO2-, NO3-, NH4+, PO43-, and SiO2) and trace element (Cd, Co, Cu, Fe, Mo, Ni, Pb, V and Zn) loadings to the coastal sea were systematically assessed along the coast of Majorca Island, Spain, in a general survey around the island and in three representative coves during 2010. We estimated that brackish water discharges through the shoreline are important contributors to the DIN, SiO2, Fe, and Zn budgets of the nearshore waters. Furthermore, our results showed that SGD-derived elements are conditioned by the hydrogeological formations of the aquifer and discharge type. Thus, while rapid discharges through karstic conduits are enriched in SiO2 and Zn, the large detrital aquifers of the island typically present enhanced concentrations of Fe. The estimated total annual inputs of chemicals constituents discharged by SGD to the coastal waters were as follows: DIN: 610 × 103 kg yr-1, SiO2: 1400 × 103 kg yr-1, Fe: 3.2 × 103 kg yr-1, and Zn: 2.0 × 103 kg yr-1. Our results provide evidence that SGD is a major contributor to the dissolved pool of inorganic nutrients and trace metals in the nearshore waters of Majorca.
AB - Submarine groundwater discharge (SGD) and derived nutrient (NO2-, NO3-, NH4+, PO43-, and SiO2) and trace element (Cd, Co, Cu, Fe, Mo, Ni, Pb, V and Zn) loadings to the coastal sea were systematically assessed along the coast of Majorca Island, Spain, in a general survey around the island and in three representative coves during 2010. We estimated that brackish water discharges through the shoreline are important contributors to the DIN, SiO2, Fe, and Zn budgets of the nearshore waters. Furthermore, our results showed that SGD-derived elements are conditioned by the hydrogeological formations of the aquifer and discharge type. Thus, while rapid discharges through karstic conduits are enriched in SiO2 and Zn, the large detrital aquifers of the island typically present enhanced concentrations of Fe. The estimated total annual inputs of chemicals constituents discharged by SGD to the coastal waters were as follows: DIN: 610 × 103 kg yr-1, SiO2: 1400 × 103 kg yr-1, Fe: 3.2 × 103 kg yr-1, and Zn: 2.0 × 103 kg yr-1. Our results provide evidence that SGD is a major contributor to the dissolved pool of inorganic nutrients and trace metals in the nearshore waters of Majorca.
UR - http://www.scopus.com/inward/record.url?scp=84908118781&partnerID=8YFLogxK
U2 - 10.1021/es502958t
DO - 10.1021/es502958t
M3 - Article
C2 - 25215451
AN - SCOPUS:84908118781
SN - 0013-936X
VL - 48
SP - 11819
EP - 11827
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 20
ER -