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Numerical simulation of tracer tests in heterogeneous aquifer (1998)
| Venue: | J. Environ. Eng. 124 Ž |
| Citations: | 9 - 1 self |
BibTeX
@ARTICLE{Zheng98numericalsimulation,
author = {C. Zheng and J. J. Jiao},
title = {Numerical simulation of tracer tests in heterogeneous aquifer},
journal = {J. Environ. Eng. 124 Ž},
year = {1998},
pages = {510--516}
}
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Abstract
ABSTRACT: A large-scale, natural-gradient tracer test in a heterogeneous aquifer at a site near Columbus, Miss. is simulated using three-dimensional (3D) hydraulic conductivity distributions derived from the borehole flowmeter test data. The simulated plume is more sensitive to the way the hydraulic conductivity field is interpolated from the measured data than it is to the dispersivity value. The transport model with longitudinal dispersivities in the range of 1-5 m can reasonably reproduce the observed plume to a certain concentration limit, but fails to reproduce the significant spreading of the tracer at diluted concentrations as observed in the field. This modeling study illustrates the formidable challenges in modeling and monitoring contaminant transport in very heterogeneous aquifers and points to the needs for new, innovative monitoring techniques that can be applied to characterize the spatial and temporal variabilities in the aquifer properties at scales suitable for detailed transport modeling.
Keyphrases
heterogeneous aquifer tracer test numerical simulation hydraulic conductivity distribution aquifer property significant spreading borehole flowmeter test data observed plume dispersivity value innovative monitoring technique certain concentration limit transport model hydraulic conductivity field detailed transport modeling longitudinal dispersivities formidable challenge monitoring contaminant transport temporal variability natural-gradient tracer test simulated plume diluted concentration modeling study
