08 Nov 2019
| 08 Nov 2019
Reservoir-scale transdimensional fracture network inversion
Márk Somogyvári
CORRESPONDING AUTHOR
Department of Hydrogeology, TU Berlin, Berlin, 10587, Germany
Institute of Mathematics, University of Potsdam, Potsdam, 14476,
Germany
Michael Kühn
Section 3.4 Fluid Systems Modelling, GFZ German Research Centre for
Geosciences, Potsdam, 14473, Germany
Institute of Geosciences, University of Potsdam, Potsdam, 14476,
Germany
Sebastian Reich
Institute of Mathematics, University of Potsdam, Potsdam, 14476,
Germany
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Melissa Präg, Ivy Becker, Christoph Hilgers, Thomas R. Walter, and Michael Kühn
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Maria Wetzel, Thomas Kempka, and Michael Kühn
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Sonja Martens, Christopher Juhlin, Viktor J. Bruckman, Gregor Giebel, Thomas Nagel, Antonio P. Rinaldi, and Michael Kühn
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Michael Kühn and Tim Schöne
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The water level of the Waiwera geothermal reservoir increased in the hours and days after the Kaikoura earthquake on 14 November 2016. We determined in a continuous time series consisting of monthly means of water level data and pumping rates starting in 1986 if events above a certain strength alter groundwater dynamics at Waiwera. A clear correlation cannot be proven but none of the recorded earthquakes led to such a high energy density in Waiwera as the Kaikoura event did.
Sonja Martens, Christopher Juhlin, Viktor J. Bruckman, Kristen Mitchell, Luke Griffiths, and Michael Kühn
Adv. Geosci., 45, 163–166, https://doi.org/10.5194/adgeo-45-163-2018, https://doi.org/10.5194/adgeo-45-163-2018, 2018
Walter Acevedo, Bijan Fallah, Sebastian Reich, and Ulrich Cubasch
Clim. Past, 13, 545–557, https://doi.org/10.5194/cp-13-545-2017, https://doi.org/10.5194/cp-13-545-2017, 2017
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The purpose of this study is to contribute to the present knowledge of paleo data assimilation techniques by addressing the following two questions: (i) Does the off-line regime naturally appear for the assimilation of tree-ring-width records into an AGCM? (ii) Is the fuzzy logic (FL)-based extension of a forward model still useful to improve the performance of a time-averaged ensemble Kalman filter technique when a climate model is used?
Márk Somogyvári, Peter Bayer, and Ralf Brauchler
Hydrol. Earth Syst. Sci., 20, 1885–1901, https://doi.org/10.5194/hess-20-1885-2016, https://doi.org/10.5194/hess-20-1885-2016, 2016
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A new innovative method of aquifer characterization is presented, using tomographic thermal tracer tests to map the hydraulic conductivity distribution. The travel times of the heated water between different sources and receivers are used in the inversion process following an analog procedure with hydraulic tomography. The developed method is a fast and robust alternative of model calibration. The method is tested on a virtual aquifer and shows applicability under a broad range of conditions.
Elena Tillner, Maria Langer, Thomas Kempka, and Michael Kühn
Hydrol. Earth Syst. Sci., 20, 1049–1067, https://doi.org/10.5194/hess-20-1049-2016, https://doi.org/10.5194/hess-20-1049-2016, 2016
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The degree of shallow aquifer salinisation triggered by fluid injection into deeper brine-bearing aquifers and brine upward migration through hydraulically conductive faults strongly depends on the regional depth of the freshwater-saltwater boundary, since displaced brines originate only from the upper fault damage zones in the study area. The highest local salinity increase in shallow aquifers occurs in case of closed model boundaries and low fault damage zone volumes.
M. De Lucia, T. Kempka, and M. Kühn
Geosci. Model Dev., 8, 279–294, https://doi.org/10.5194/gmd-8-279-2015, https://doi.org/10.5194/gmd-8-279-2015, 2015
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