How significant is the slope of the sea-side boundary for modelling seawater intrusion in coastal aquifers?

Research output: Contribution to journal › Article › Research › peer review

Authors

  • Thomas Graf
  • Olaf Kolditz
  • Rudolf Liedl
  • Vincent Post
  • Manfred Walther

Research Organisations

External Research Organisations

  • Helmholtz Zentrum München - German Research Center for Environmental Health
  • Technische Universität Dresden
  • Federal Institute for Geosciences and Natural Resources (BGR)
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Details

Original languageEnglish
Pages (from-to)648-659
Number of pages12
JournalJournal of hydrology
Volume551
Publication statusPublished - 3 Mar 2017

Abstract

Application of numerical models is a common method to assess groundwater resources. The versatility of these models allows consideration of different levels of complexity, but the accuracy of the outcomes hinges upon a proper description of the system behaviour. In seawater intrusion assessment, the implementation of the sea-side boundary condition is of particular importance. We evaluate the influence of the slope of the sea-side boundary on the simulation results of seawater intrusion in a freshwater aquifer by employing a series of slope variations together with a sensitivity analysis by varying additional sensitive parameters (freshwater inflow and longitudinal and transverse dispersivities). Model results reveal a multi-dimensional dependence of the investigated variables with an increasing relevance of the sea-side boundary slope for seawater intrusion (decrease of up to 32%), submarine groundwater discharge zone (reduction of up to 55%), and turnover times (increase of up to 730%) with increasing freshwater inflow or dispersivity values.

Keywords

    Coastal aquifers, Numerical investigation, OpenGeoSys, Residence times, Saltwater intrusion, Sea-side boundary condition, Submarine groundwater discharge

ASJC Scopus subject areas

Sustainable Development Goals

Cite this

How significant is the slope of the sea-side boundary for modelling seawater intrusion in coastal aquifers? / Graf, Thomas; Kolditz, Olaf; Liedl, Rudolf et al.
In: Journal of hydrology, Vol. 551, 03.03.2017, p. 648-659.

Research output: Contribution to journal › Article › Research › peer review

Graf T, Kolditz O, Liedl R, Post V, Walther M. How significant is the slope of the sea-side boundary for modelling seawater intrusion in coastal aquifers? Journal of hydrology. 2017 Mar 3;551:648-659. doi: 10.1016/j.jhydrol.2017.02.031
Graf, Thomas ; Kolditz, Olaf ; Liedl, Rudolf et al. / How significant is the slope of the sea-side boundary for modelling seawater intrusion in coastal aquifers?. In: Journal of hydrology. 2017 ; Vol. 551. pp. 648-659.
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abstract = "Application of numerical models is a common method to assess groundwater resources. The versatility of these models allows consideration of different levels of complexity, but the accuracy of the outcomes hinges upon a proper description of the system behaviour. In seawater intrusion assessment, the implementation of the sea-side boundary condition is of particular importance. We evaluate the influence of the slope of the sea-side boundary on the simulation results of seawater intrusion in a freshwater aquifer by employing a series of slope variations together with a sensitivity analysis by varying additional sensitive parameters (freshwater inflow and longitudinal and transverse dispersivities). Model results reveal a multi-dimensional dependence of the investigated variables with an increasing relevance of the sea-side boundary slope for seawater intrusion (decrease of up to 32%), submarine groundwater discharge zone (reduction of up to 55%), and turnover times (increase of up to 730%) with increasing freshwater inflow or dispersivity values.",
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AU - Graf, Thomas

AU - Kolditz, Olaf

AU - Liedl, Rudolf

AU - Post, Vincent

AU - Walther, Manfred

N1 - Publisher Copyright: © 2017 Elsevier B.V. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017/3/3

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N2 - Application of numerical models is a common method to assess groundwater resources. The versatility of these models allows consideration of different levels of complexity, but the accuracy of the outcomes hinges upon a proper description of the system behaviour. In seawater intrusion assessment, the implementation of the sea-side boundary condition is of particular importance. We evaluate the influence of the slope of the sea-side boundary on the simulation results of seawater intrusion in a freshwater aquifer by employing a series of slope variations together with a sensitivity analysis by varying additional sensitive parameters (freshwater inflow and longitudinal and transverse dispersivities). Model results reveal a multi-dimensional dependence of the investigated variables with an increasing relevance of the sea-side boundary slope for seawater intrusion (decrease of up to 32%), submarine groundwater discharge zone (reduction of up to 55%), and turnover times (increase of up to 730%) with increasing freshwater inflow or dispersivity values.

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