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Physically based groundwater vulnerability assessment using sensitivity analysis methods.

Jean Beaujean1, Jean-Michel Lemieux, Alain Dassargues

  • 1Hydrogeology & Environmental Geology, Geo3 Group, ArGEnCo Department, Aquapôle, B-52/3, Université de Liège, B-4000 Liège, Belgium; Currently at Applied Geophysics, Geo3 Group, ArGEnCo Department, Université de Liège, Liège, Belgium.

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This summary is machine-generated.

This study introduces a new physically based method to assess groundwater vulnerability using numerical simulations. It helps predict how external pressures impact groundwater resources by calculating sensitivity coefficients.

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Area of Science:

  • Hydrogeology
  • Environmental Science
  • Computational Modeling

Background:

  • Groundwater vulnerability assessment is crucial for sustainable water resource management.
  • Existing methods may lack physical basis or computational efficiency.
  • Understanding groundwater response to external pressures is vital.

Purpose of the Study:

  • To present a general, physically based method for assessing groundwater vulnerability.
  • To introduce physically based indicators for groundwater state sensitivity.
  • To compare computational efficiency of different sensitivity analysis methods.

Main Methods:

  • Numerical simulation of groundwater flow.
  • Calculation of sensitivity coefficients for user-defined groundwater states.
  • Application of the sensitivity equation method and the adjoint operator method.

Main Results:

  • The proposed method provides a physically grounded approach to groundwater vulnerability.
  • Sensitivity analysis methods (equation and adjoint operator) offer computational efficiency.
  • The Herten aquifer analog demonstrates the method's applicability to complex systems.

Conclusions:

  • The presented methodology offers a robust framework for assessing groundwater vulnerability.
  • The choice of sensitivity analysis method significantly impacts computational load.
  • This approach has potential for application in complex real-world aquifer systems.