Abstract
The objective of this experiment was to map tracer transport in fractured crystalline rock through a combination of radar difference tomography and measurements of tracer concentration in boreholes and the validation drift. The experiment was performed twice, first the D-boreholes were used as a sink and then they were replaced by the validation drift and the experiment repeated. In both experiments saline tracer (200 ml/min, 2% salinity) was injected into fracture zone H about 25 m from the validation drift. The experiment revealed an inhomogeneous transmissivity distribution in Zone H. A significant portion of the tracer is transported upwards along Zone H and towards boreholes T1, T2, and W1. The breakthrough data from both experiments indicate that there are two major transport paths from borehole C2 to the D-boreholes/validation drift. One slow and diluted path to the bottom of the drift which carries the bulk of the mass and one fast path to the crown of the drift with high tracer concentration. The radar difference tomograms show that some tracer is lost through Zone S which intersects Zone H and is nearly perpendicular to it. The intersection between the two zones seems to constitute a preferred flow path. The breakthrough
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Olsson, O;
[1]
Andersson, P;
Gustafsson, E
[2]
- Conterra AB, Uppsala (Sweden)
- Geosigma AB, Uppsala (Sweden)
Citation Formats
Olsson, O, Andersson, P, and Gustafsson, E.
Site characterization and validation - monitoring of saline tracer transport by borehole radar measurements. Final report.
Sweden: N. p.,
1991.
Web.
Olsson, O, Andersson, P, & Gustafsson, E.
Site characterization and validation - monitoring of saline tracer transport by borehole radar measurements. Final report.
Sweden.
Olsson, O, Andersson, P, and Gustafsson, E.
1991.
"Site characterization and validation - monitoring of saline tracer transport by borehole radar measurements. Final report."
Sweden.
@misc{etde_10135753,
title = {Site characterization and validation - monitoring of saline tracer transport by borehole radar measurements. Final report}
author = {Olsson, O, Andersson, P, and Gustafsson, E}
abstractNote = {The objective of this experiment was to map tracer transport in fractured crystalline rock through a combination of radar difference tomography and measurements of tracer concentration in boreholes and the validation drift. The experiment was performed twice, first the D-boreholes were used as a sink and then they were replaced by the validation drift and the experiment repeated. In both experiments saline tracer (200 ml/min, 2% salinity) was injected into fracture zone H about 25 m from the validation drift. The experiment revealed an inhomogeneous transmissivity distribution in Zone H. A significant portion of the tracer is transported upwards along Zone H and towards boreholes T1, T2, and W1. The breakthrough data from both experiments indicate that there are two major transport paths from borehole C2 to the D-boreholes/validation drift. One slow and diluted path to the bottom of the drift which carries the bulk of the mass and one fast path to the crown of the drift with high tracer concentration. The radar difference tomograms show that some tracer is lost through Zone S which intersects Zone H and is nearly perpendicular to it. The intersection between the two zones seems to constitute a preferred flow path. The breakthrough data and the radar difference tomograms have also been used to estimate flow porosity. The estimate obtained area of the same order approximately 10{sup -4}. (au) (28 refs.).}
place = {Sweden}
year = {1991}
month = {Aug}
}
title = {Site characterization and validation - monitoring of saline tracer transport by borehole radar measurements. Final report}
author = {Olsson, O, Andersson, P, and Gustafsson, E}
abstractNote = {The objective of this experiment was to map tracer transport in fractured crystalline rock through a combination of radar difference tomography and measurements of tracer concentration in boreholes and the validation drift. The experiment was performed twice, first the D-boreholes were used as a sink and then they were replaced by the validation drift and the experiment repeated. In both experiments saline tracer (200 ml/min, 2% salinity) was injected into fracture zone H about 25 m from the validation drift. The experiment revealed an inhomogeneous transmissivity distribution in Zone H. A significant portion of the tracer is transported upwards along Zone H and towards boreholes T1, T2, and W1. The breakthrough data from both experiments indicate that there are two major transport paths from borehole C2 to the D-boreholes/validation drift. One slow and diluted path to the bottom of the drift which carries the bulk of the mass and one fast path to the crown of the drift with high tracer concentration. The radar difference tomograms show that some tracer is lost through Zone S which intersects Zone H and is nearly perpendicular to it. The intersection between the two zones seems to constitute a preferred flow path. The breakthrough data and the radar difference tomograms have also been used to estimate flow porosity. The estimate obtained area of the same order approximately 10{sup -4}. (au) (28 refs.).}
place = {Sweden}
year = {1991}
month = {Aug}
}