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Influence of Fracture Truncation on Dispersion: A Dual Permeability Model
Journal of Contaminant Hydrology (1998)
  • Paige Stafford, Oak Ridge National Laboratory
  • Laura Toran, Oak Ridge National Laboratory
  • Larry McKay, University of Tennessee - Knoxville
Simulations with a dual permeability model show that a few discrete fractures can have a major influence on plume geometry. A limited number of truncated fractures (1–4) within a permeable matrix can create nearly circular plumes, with about the same degree of spreading in the direction transverse to the average hydraulic gradient as in the longitudinal direction. By comparison, continuous fractures in the direction of flow tend to produce elongated plumes, similar to those typically seen in granular materials. Both types of plumes have been observed in tracer experiments in fractured porous media on the Oak Ridge Reservation. Understanding the influence of fracture geometry is important in planning field characterization and subsequent remediation in fractured porous media.
Publication Date
March, 1998
Citation Information
Paige Stafford, Laura Toran and Larry McKay. "Influence of Fracture Truncation on Dispersion: A Dual Permeability Model" Journal of Contaminant Hydrology Vol. 30 Iss. 1-2 (1998)
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