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Tracing stream leakage towards an alluvial aquifer in a mountain basin using environmental isotopes

Stream-aquifer relationships in mountain basins are of great relevance because they control the water balance and, with it, the amount of resources (whether surface water or ground water) available for ecological and human demands. In this paper, this relationship is studied using environmental isotopes (δ18O and δD) to identify the occurrence of stream recharge in the Arbúcies River basin (NE Spain). Isotopic data from 51 natural springs define the local altitudinal gradient. This function is weighted by the proportional area above each point, given by the hypsometric curve, in order to estimate the isotopic stream water content as the contribution of runoff from incremental elevations. Stream water isotopes from two surveys are compared with hypsometrically averaged isotopic values to check for the appropriateness of this approach. Results show that it is more suitable when subsurface flows from surface formations, such as alluvial deposits, are the main contributors to stream discharge than when it derives from a single rainfall event. The characterization of stream isotope values is used as a key factor in identifying stream leakage to an unconfined alluvial aquifer in the lower reach of the Arbúcies River

Its development benefits from research Project CGL-2008-06373-C03-03 and continued under Project CGL-2011-29975-C04-04 of the Spanish Government.

info:eu-repo/grantAgreement/MICINN//CGL2008-06373-C03-03/ES/POLUCION DE LAS AGUAS SUBTERRANEAS DE ORIGEN AGRICOLA E INDUSTRIAL: MIGRACION DE CONTAMINANTES, ATENUACION NATURAL E INDUCIDA, Y VULNERABILIDAD/

Elsevier

Director: Ministerio de Educación y Ciencia (Espanya)
Ministerio de Ciencia e Innovación (Espanya)
Autor: Mas-Pla, Josep
Font, Eva
Astui, Oihane
Menció i Domingo, Anna
Pérez Paricio, Alfredo
Data: 1 maig 2013
Resum: Stream-aquifer relationships in mountain basins are of great relevance because they control the water balance and, with it, the amount of resources (whether surface water or ground water) available for ecological and human demands. In this paper, this relationship is studied using environmental isotopes (δ18O and δD) to identify the occurrence of stream recharge in the Arbúcies River basin (NE Spain). Isotopic data from 51 natural springs define the local altitudinal gradient. This function is weighted by the proportional area above each point, given by the hypsometric curve, in order to estimate the isotopic stream water content as the contribution of runoff from incremental elevations. Stream water isotopes from two surveys are compared with hypsometrically averaged isotopic values to check for the appropriateness of this approach. Results show that it is more suitable when subsurface flows from surface formations, such as alluvial deposits, are the main contributors to stream discharge than when it derives from a single rainfall event. The characterization of stream isotope values is used as a key factor in identifying stream leakage to an unconfined alluvial aquifer in the lower reach of the Arbúcies River
Its development benefits from research Project CGL-2008-06373-C03-03 and continued under Project CGL-2011-29975-C04-04 of the Spanish Government.
Format: application/pdf
Accés al document: http://hdl.handle.net/10256/12932
Llenguatge: eng
Editor: Elsevier
Col·lecció: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apgeochem.2012.10.016
info:eu-repo/semantics/altIdentifier/issn/0883-2927
info:eu-repo/grantAgreement/MICINN//CGL2011-29975-C04-04/ES/ATENUACION NATURAL E INDUCIDA DE LA CONTAMINACION DE ORIGEN AGRICOLA E INDUSTRIAL EN AGUAS SUBTERRANEAS./
És part de: info:eu-repo/grantAgreement/MICINN//CGL2008-06373-C03-03/ES/POLUCION DE LAS AGUAS SUBTERRANEAS DE ORIGEN AGRICOLA E INDUSTRIAL: MIGRACION DE CONTAMINANTES, ATENUACION NATURAL E INDUCIDA, Y VULNERABILIDAD/
Drets: Tots els drets reservats
Matèria: Aigües subterrànies -- Escolament
Groundwater flow
Aigües subterrànies -- Aspectes ambientals
Groundwater -- Environmental aspects
Títol: Tracing stream leakage towards an alluvial aquifer in a mountain basin using environmental isotopes
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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