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Cross-borehole electrical monitoring in groundwater remediation projects : Understanding the flow path of remediation agents

Lévy, L. LU ; Bording, T. ; Vest Christiansen, A. ; Thalund-Hansen, R. and Bjerg, P. L. (2021) 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 In 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 p.1-5
Abstract

In-situ remediation of contaminated groundwater often relies on the installation of a treatment zone degrading the pollution plume. In such projects, adequate delivery of remediation agents in the whole target volume is not trivial. Monitoring the spatial distribution of injected reagents is important for engineers and decision-makers, in order to determine the need of more careful injection in some areas. In this study, we use cross-borehole electrical resistivity tomography (XB-ERT) at two contaminated sites in Denmark to visualize the progressive spreading of two different chemical reagents: an oxidant and a reduction agent made of solid iron particles. Both reagents lead to significant electrical resistivity changes in the... (More)

In-situ remediation of contaminated groundwater often relies on the installation of a treatment zone degrading the pollution plume. In such projects, adequate delivery of remediation agents in the whole target volume is not trivial. Monitoring the spatial distribution of injected reagents is important for engineers and decision-makers, in order to determine the need of more careful injection in some areas. In this study, we use cross-borehole electrical resistivity tomography (XB-ERT) at two contaminated sites in Denmark to visualize the progressive spreading of two different chemical reagents: an oxidant and a reduction agent made of solid iron particles. Both reagents lead to significant electrical resistivity changes in the subsurface. We observe major differences in the spreading uniformity at the two sites, which we explain by different average permeability and reagent viscosity. We compare tomography results to induction logs in order to evaluate the reliability of the cross-borehole technique.

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Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
1st Conference on Hydrogeophysics : Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021 - Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021
series title
1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021
pages
1 - 5
publisher
Wiley-Blackwell
conference name
1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021
conference location
Bordeaux, Virtual, France
conference dates
2021-08-29 - 2021-09-02
external identifiers
  • scopus:85125192816
ISBN
9789462823877
DOI
10.3997/2214-4609.202120140
language
English
LU publication?
no
additional info
Publisher Copyright: © 1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021.
id
6de6ad42-7440-452c-bbfd-a642a4650760
date added to LUP
2022-03-09 09:18:13
date last changed
2023-01-24 23:49:26
@inproceedings{6de6ad42-7440-452c-bbfd-a642a4650760,
  abstract     = {{<p>In-situ remediation of contaminated groundwater often relies on the installation of a treatment zone degrading the pollution plume. In such projects, adequate delivery of remediation agents in the whole target volume is not trivial. Monitoring the spatial distribution of injected reagents is important for engineers and decision-makers, in order to determine the need of more careful injection in some areas. In this study, we use cross-borehole electrical resistivity tomography (XB-ERT) at two contaminated sites in Denmark to visualize the progressive spreading of two different chemical reagents: an oxidant and a reduction agent made of solid iron particles. Both reagents lead to significant electrical resistivity changes in the subsurface. We observe major differences in the spreading uniformity at the two sites, which we explain by different average permeability and reagent viscosity. We compare tomography results to induction logs in order to evaluate the reliability of the cross-borehole technique.</p>}},
  author       = {{Lévy, L. and Bording, T. and Vest Christiansen, A. and Thalund-Hansen, R. and Bjerg, P. L.}},
  booktitle    = {{1st Conference on Hydrogeophysics : Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021}},
  isbn         = {{9789462823877}},
  language     = {{eng}},
  pages        = {{1--5}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{1st Conference on Hydrogeophysics: Contribution to Exploration and Management of Groundwater, Land-Use and Natural Hazards under a Changing Climate, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021}},
  title        = {{Cross-borehole electrical monitoring in groundwater remediation projects : Understanding the flow path of remediation agents}},
  url          = {{http://dx.doi.org/10.3997/2214-4609.202120140}},
  doi          = {{10.3997/2214-4609.202120140}},
  year         = {{2021}},
}