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

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

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

Organisationseinheiten

Externe Organisationen

  • Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt
  • Technische Universität Dresden
  • Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
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Details

OriginalspracheEnglisch
Seiten (von - bis)648-659
Seitenumfang12
FachzeitschriftJournal of hydrology
Jahrgang551
PublikationsstatusVeröffentlicht - 3 März 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.

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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, Jahrgang 551, 03.03.2017, S. 648-659.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › 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 Mär 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 ; Jahrgang 551. S. 648-659.
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title = "How significant is the slope of the sea-side boundary for modelling seawater intrusion in coastal aquifers?",
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

Y1 - 2017/3/3

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.

AB - 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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KW - Numerical investigation

KW - OpenGeoSys

KW - Residence times

KW - Saltwater intrusion

KW - Sea-side boundary condition

KW - Submarine groundwater discharge

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