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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/hess-2020-256
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2020-256
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  07 Jul 2020

07 Jul 2020

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A revised version of this preprint is currently under review for the journal HESS.

Technical Note: Disentangling the groundwater response to Earth and atmospheric tides to improve subsurface characterisation

Gabriel C. Rau1,2, Mark O. Cuthbert3,2, R. Ian Acworth2, and Philipp Blum1 Gabriel C. Rau et al.
  • 1Karlsruhe Institute of Technology (KIT), Institute of Applied Geosciences (AGW), Karlsruhe, Germany
  • 2The University of New South Wales (UNSW), Connected Waters Initiative Research Centre (CWI), Sydney, Australia
  • 3Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom

Abstract. The groundwater response to Earth tides and atmospheric pressure changes can be used to understand subsurface processes and estimate hydraulic and hydro-mechanical properties. We develop a generalised frequency domain approach to disentangle the impacts of Earth and atmospheric tides on groundwater level responses. By considering the complex harmonic properties of the signal, we improve upon a previous method for estimating barometric efficiency (BE) estimation while simultaneously assessing system confinement and estimating hydraulic conductivity as well as specific storage. We demonstrate and validate the novel approach using an example barometric and groundwater pressure record with strong Earth tide influences. Our method enables improved and rapid assessment of subsurface processes and properties using standard pressure measurements.

Gabriel C. Rau et al.

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Gabriel C. Rau et al.

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Short summary
This work provides an important generalisation of a previously developed method that quantifies subsurface barometric efficiency using the groundwater level response to Earth and atmospheric tides. The new approach additionally allows quantification of hydraulic conductivity and specific storage. This enables improved and rapid assessment of subsurface processes and properties using standard pressure measurements.
This work provides an important generalisation of a previously developed method that quantifies...
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