ESR N° 15: Integration of dynamical hydrogeophysical data in a multiple-point geostatistical framework

Research Fellow: Jorge Lopez Alvis
Profile

hosted at Applied Geophysics, University of Liege

Supervisors
Frédéric Nguyen, Applied Geophysics, University of Liege
Thomas Hermans, Departement of Geology, Ghent University

Secondments
CSIC Barcelona – 6 months (2019,2020)
Aquale – 2 months (2020)
Ghent University – 2 months (2020)

Research objectives

Integrate time-lapse geophysical data sets, at an hourly or daily temporal resolution, into a geostatistical inverse framework to gain insight on transport processes and hydrogeological parameters distribution in the subsurface.

Tasks and methodology

Bayesian evidential learning (BEL) of data-prediction relationships will be applied using geophysical data and subsurface transport models. Within the BEL framework, probabilistic falsification will be used to check for consistency of plausible geological scenarios. A combination of 3D image analysis on geophysical data (ERT, SIP and GPR), temporal information, multiple-point geostatistical simulations and dimension reduction techniques will be integrated in the framework.

Database

Produced data will be inserted in the H+ database.

Dissemination and communication

2019

Publication in Water Resources Vol 133: “A cross-validation framework to extract data features for reducing structural uncertainty in subsurface heterogeneity
https://doi.org/10.1016/j.advwatres.2019.103427

2018

Presentation at AGU Fall Meeting (Washington DC, USA): “Updating structural uncertainty through dimension reduction of geophysical data

June 2018: Oral presentation at the 2018 Computational Methods in Water Resources (CMWR) conference: “Updating prior geologic uncertainty with GPR traveltime tomographic data”.

Poster presented during the 4th Cargèse Summer School:“Updating uncertainty in hierarchical subsurface model using geophysical data: synthetic case for crossborehole-hole GPR”.

November 2018: Geology Research seminar in University of Ghent: “Using geophysical data to update uncertainty in structural parameters of subsurface models”.

Glossary

  • BEL – bayesian approach where subsurface models are used to learn a statistical model that relates data and prediction variables.
  • ERT – electrical resistivity tomography.
  • SIP – spectral induced polarization.
  • GPR – ground penetrating radar.