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The role of groundwater recharge and baseflow in integrated models

Conference paper
Authors J. Götzinger
Roland Barthel
J. Jagelke
A. Bárdossy
Published in IAHS-AISH Publication
Volume 321
Pages 103-109
Publication year 2008
Published at Department of Earth Sciences
Pages 103-109
Language en
Keywords Basetlow, Groundwater recharge, HBV, Model integration, MODFLOW, Neckar, Boundary value problems, Climate change, Environmental impact, Flow interactions, Forestry, Groundwater, Groundwater flow, Hydrogeology, Information management, Land use, Theorem proving, Underground reservoirs, Water management, Water resources, Watersheds, Surface waters, baseflow, boundary condition, calibration, flow modeling, groundwater-surface water interaction, hydrological modeling, integrated approach, recharge, river basin, subsurface flow, Central Europe, Eurasia, Europe, Germany, Neckar River, Hepatitis B virus
Subject categories Hydrology, Water in nature and society

Abstract

Integrated water resources management is often concerned with problems on the river basin scale, e.g. impact assessment of climate and land-use change or the implementation of river basin management plans (i.e. the European Water Framework Directive). This requires integrated approaches of analysis and modelling. Important processes coupling the groundwater and the surface water systems (soil, unsaturated zone, surface waters) are groundwater recharge and discharge (baseflow). hi this study it will be shown that these processes have been used to integrate a hydrological and a groundwater flow model. This has helped in revealing inconsistencies of process descriptions that often do not become apparent in stand-alone models if recharge and baseflow are only accounted for in the boundary conditions. Model integration provides more measurable quantities for model calibration, and provides an opportunity for an indirect check on internal state variables, the model structure, and the conceptual base of the model itself. In this study, integration shows that significant inter-basin subsurface fluxes exist in parts of the basin which contradict the delineated surface sub-basins. Copyright © 2008 IAHS Press.

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