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

Josep Mas-Pla, Anna Menció, Albert Marsiñach

    Research output: Contribution to journalArticleResearchpeer-review

    11 Citations (Scopus)

    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. © 2012 Springer Science+Business Media Dordrecht.
    Original languageEnglish
    Pages (from-to)293-308
    JournalWater Resources Management
    Volume27
    Issue number1
    DOIs
    Publication statusPublished - 1 Jan 2013

    Keywords

    • End-member analysis
    • Mixing
    • Overexploitation
    • Stream-aquifer interaction

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