Modeling Dispersion in Non-Homogenous Formationsby David A. Chin, Univ of Miami, Coral Gables, FL, USA,
Abstract: A stochastic model of contaminant mixing in non-homogeneous porous media has been developed. The model is three dimensional and relates the contaminant distribution to the probability distribution of particles released from a source. Particles are advected by interpolating Lagrangian velocities from a velocity grid whose nodal values are estimated using a three-dimensional finite-difference groundwater flow model. A random seepage velocity is related to the variance of the hydraulic conductivity within each segment of the formation. This formulation is shown to accurately simulate the dispersion process in idealized formations and yield results consistent with field observations.
Subject Headings: Groundwater flow | Three-dimensional models | Hydrologic models | Groundwater pollution | Particle velocity | Fluid velocity | Mathematical models | Fluid flow
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