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Basement Groundwater as a Complementary Resource for Overexploited Stream-Connected Alluvial Aquifers

The use of groundwater from alluvial aquifers largely affects stream discharge by capturing the stream resources. This affects hydrological processes and riparian biodiversity. In this study, complementary water resources are investigated in an effort to ease human pressure on alluvial systems and, eventually, on stream-aquifer relationships. Discharge and hydrochemical data along a 5 km reach of the Tordera River (NE Spain) provide evidence that groundwater fluxes, associated with a regional hydrogeological system related to the basement fracture network, contribute to alluvial recharge and to stream flow. End-member mixing analysis considering upstream discharge, groundwater flows, and human inputs to the stream as major flow sources shows that regional basement groundwater fluxes are responsible for as much as 20 % of the total discharge, which also explains unexpected rises in stream flow. This suggests a possible new approach to local water resources planning, indicating that conjunctive use might actually be feasible

This study was carried out in the context of project CGL2008-06373-C03-03/BTE funded by the Spanish Government (MEC)

© Water Resources Management, 2013, vol. 27, núm. 1, p. 293-308

Springer Verlag

Author: Mas-Pla, Josep
Menció i Domingo, Anna
Marsiñach, Albert
Date: 2013 January 1
Abstract: The use of groundwater from alluvial aquifers largely affects stream discharge by capturing the stream resources. This affects hydrological processes and riparian biodiversity. In this study, complementary water resources are investigated in an effort to ease human pressure on alluvial systems and, eventually, on stream-aquifer relationships. Discharge and hydrochemical data along a 5 km reach of the Tordera River (NE Spain) provide evidence that groundwater fluxes, associated with a regional hydrogeological system related to the basement fracture network, contribute to alluvial recharge and to stream flow. End-member mixing analysis considering upstream discharge, groundwater flows, and human inputs to the stream as major flow sources shows that regional basement groundwater fluxes are responsible for as much as 20 % of the total discharge, which also explains unexpected rises in stream flow. This suggests a possible new approach to local water resources planning, indicating that conjunctive use might actually be feasible
This study was carried out in the context of project CGL2008-06373-C03-03/BTE funded by the Spanish Government (MEC)
Format: application/pdf
ISSN: 0920-4741 (versió paper)
1573-1650 (versió electrònica)
Document access: http://hdl.handle.net/10256/12920
Language: eng
Publisher: Springer Verlag
Collection: MEC/PN 2009-2011/CGL2008-06373-C03-03
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s11269-012-0186-y
Articles publicats (D-CCAA)
Is part of: © Water Resources Management, 2013, vol. 27, núm. 1, p. 293-308
Rights: Tots els drets reservats
Subject: Recursos hidràulics -- Explotació
Water resources development
Aigües subterrànies -- Escolament
Groundwater flow
Title: Basement Groundwater as a Complementary Resource for Overexploited Stream-Connected Alluvial Aquifers
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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