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Deterministic analysis and upscaling of Bromide Transport in a heterogeneous Vadose zone
Year:
2009
Source of publication :
Vadose Zone Journal
Authors :
Segal, Eran
;
.
Volume :
8
Co-Authors:
Segal, E., Dep. of Environmental Sciences, Univ. of California, Riverside, CA 92507, United States
Shouse, P., U.S. Salinity Lab, Riverside, CA 92507, United States
Bradford, S.A., U.S. Salinity Lab, Riverside, CA 92507, United States
Facilitators :
From page:
601
To page:
610
(
Total pages:
10
)
Abstract:
Conservative solute transport experiments were conducted at a field plot and on an undisturbed soil core from the same site. The hydraulic and solute transport properties were extensively characterized so that the data could be analyzed from a deterministic perspective. To investigate the influence of scale and conceptual model on solute transport in the relatively homogeneous upper soil profile of the field site, breakthrough curves that were collected at different depths in the undisturbed column and in the field experiments were compared and analyzed. The mobile-immobile model provided a physically realistic description of the column data that was largely independent of the transport distance, and upscaling from the undisturbed core to the field plot was relatively successful. Mean and variance of the Br- travel times were controlled by plot-scale variability in soil water content and heterogeneity, which was overcome by averaging the concentration values from four locations at the same depth and time, and analyzing the Br- transport behavior as a one-dimensional process. Differences between the measured and simulated mass balances, average concentration, and the variations in concentration were predicted reasonably well across depth and time. Although prediction of the exact concentration information at a given point was not achieved, this study demonstrates that area-average Br- transport in a heterogeneous vadose zone can be deterministically quantified. © Soil Science Society of America.
Note:
Related Files :
breakthrough curve
CDE, Convection-dispersion equation
one-dimensional modeling
Solute transport
vadose zone
Show More
Related Content
More details
DOI :
10.2136/vzj2008.0173
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19720
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:31
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Scientific Publication
Deterministic analysis and upscaling of Bromide Transport in a heterogeneous Vadose zone
8
Segal, E., Dep. of Environmental Sciences, Univ. of California, Riverside, CA 92507, United States
Shouse, P., U.S. Salinity Lab, Riverside, CA 92507, United States
Bradford, S.A., U.S. Salinity Lab, Riverside, CA 92507, United States
Deterministic analysis and upscaling of Bromide Transport in a heterogeneous Vadose zone
Conservative solute transport experiments were conducted at a field plot and on an undisturbed soil core from the same site. The hydraulic and solute transport properties were extensively characterized so that the data could be analyzed from a deterministic perspective. To investigate the influence of scale and conceptual model on solute transport in the relatively homogeneous upper soil profile of the field site, breakthrough curves that were collected at different depths in the undisturbed column and in the field experiments were compared and analyzed. The mobile-immobile model provided a physically realistic description of the column data that was largely independent of the transport distance, and upscaling from the undisturbed core to the field plot was relatively successful. Mean and variance of the Br- travel times were controlled by plot-scale variability in soil water content and heterogeneity, which was overcome by averaging the concentration values from four locations at the same depth and time, and analyzing the Br- transport behavior as a one-dimensional process. Differences between the measured and simulated mass balances, average concentration, and the variations in concentration were predicted reasonably well across depth and time. Although prediction of the exact concentration information at a given point was not achieved, this study demonstrates that area-average Br- transport in a heterogeneous vadose zone can be deterministically quantified. © Soil Science Society of America.
Scientific Publication
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