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Groundwater-surface water interactions: New methods and models to improve understanding of processes and dynamics
Authors:Jan H Fleckenstein  Stefan Krause  David M Hannah  Fulvio Boano
Institution:1. Department of Hydrogeology, Helmholtz Center for Environmental Research (UFZ), 04318 Leipzig, Germany;2. School for Physical and Geographical Sciences, Keele University, Keele, Staffordshire, ST5 5BG, UK;3. School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston. Birmingham. B15 2TT, UK;4. Department of Hydraulics, Transport & Civil Infrastructures, Politecnico di Torino, Corso Duca degli Abruzzi 24-10129 Torino, Italy
Abstract:Interest in groundwater (GW)-surface water (SW) interactions has grown steadily over the last two decades. New regulations such as the EU Water Framework Directive (WFD) now call for a sustainable management of coupled ground- and surface water resources and linked ecosystems. Embracing this mandate requires new interdisciplinary research on GW-SW systems that addresses the linkages between hydrology, biogeochemistry and ecology at nested scales and specifically accounts for small-scale spatial and temporal patterns of GW-SW exchange. Methods to assess these patterns such as the use of natural tracers (e.g. heat) and integrated surface-subsurface numerical models have been refined and enhanced significantly in recent years and have improved our understanding of processes and dynamics. Numerical models are increasingly used to explore hypotheses and to develop new conceptual models of GW-SW interactions. New technologies like distributed temperature sensing (DTS) allow an assessment of process dynamics at unprecedented spatial and temporal resolution. These developments are reflected in the contributions to this Special Issue on GW-SW interactions. However, challenges remain in transferring process understanding across scales.
Keywords:Groundwater-surface water interactions  River-aquifer exchange
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