Hydrodynamic Dispersion: Estimation and Prediction

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by Hugo A. Loaiciga, Wright State Univ, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: The dispersion of dissolved, nonreactive tracers in groundwater is governed by diffusion and advection. A.E. Scheidegger introduced the term dispersivity to describe the effect that a porous medium geometry has on the isotropic spreading of a tracer moving under an external force. Ever since, the most thorough analyses of hydrodynamic dispersion have incorporated the influence of hydraulic conductivity heterogeneity and anisotropy and conceptualize the medium' property in terms of local or small scale and macroscopic dispersivity. This paper examines the implications of classical isotropic and current statistical analyses of macrodispersion on the prediction of plume displacement and the estimation of dispersivities.

Subject Headings: Probe instruments | Isotropy | Plumes | Displacement (mechanics) | Fluid flow | Groundwater | Diffusion (porous media) |

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