Effect of Macroporous on Soil Hydrodynamic Dispersion Coefficient
SHANG Man-ting
FENG Jie
LIU Pei-gui
Abstract：Using the bromine ion as a tracer, hydrodynamic dispersion coefficient and dispersivity of disturbed and undisturbed soil are given more detailed experimental study in this paper. The hydrodynamic dispersion coefficient of disturbed soil is obtained from normal distribution function method. And by analysis the proportional relation between hydrodynamic dispersion coefficient and average porous velocity, its dispersivity is achieved. Besides, comparing on the simulated values with observed values of concentration of bromine ion, the undisturbed soil's hy-drodynamic dispersion coefficient and dispersivity are obtained. Finally, their analysis results show the following two points. The dispersivity of disturbed and undisturbed soil is at the same magnitude. However, because of the average porous velocity influences, the hydrodynamic dispersion coefficient of undisturbed soil is two orders of magnitude higher than that of disturbed soil.
Keywords：soil macroporehydrodynamic dispersion coefficientdispersivitynormal distribution function method
Publication Date：2009-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 52-54,66 )