Cross-borehole electrical monitoring in groundwater remediation projects : Understanding the flow path of remediation agents
(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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- author
- Lévy, L. LU ; Bording, T. ; Vest Christiansen, A. ; Thalund-Hansen, R. and Bjerg, P. L.
- publishing date
- 2021
- type
- 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}}, }