On the effective hydraulic conductivity and macrodispersivity for density-dependent groundwater flow


Autoria(s): Jiang, Zhenjiao; Raiber, Matthias; Bian, Jianmin; Cox, Malcolm
Data(s)

2013

Resumo

In this paper, semi-analytical expressions of the effective hydraulic conductivity ( KE) and macrodispersivity ( αE) for 3D steady-state density-dependent groundwater flow are derived using a stationary spectral method. Based on the derived expressions, we present the dependence of KE and αE on the density of fluid under different dispersivity and spatial correlation scale of hydraulic conductivity. The results show that the horizontal KE and αE are not affected by density-induced flow. However, due to gravitational instability of the fluid induced by density contrasts, both vertical KE and αE are found to be reduced slightly when the density factor ( γ ) is less than 0.01, whereas significant decreases occur when γ exceeds 0.01. Of note, the variation of KE and αE is more significant when local dispersivity is small and the correlation scale of hydraulic conductivity is large.

Identificador

http://eprints.qut.edu.au/59242/

Publicador

Springer Netherlands

Relação

DOI:10.1007/s10652-013-9281-8

Jiang, Zhenjiao, Raiber, Matthias, Bian, Jianmin, & Cox, Malcolm (2013) On the effective hydraulic conductivity and macrodispersivity for density-dependent groundwater flow. Environmental Fluid Mechanics, pp. 1-15.

Direitos

Copyright 2013 Springer.

Fonte

School of Earth, Environmental & Biological Sciences; Science & Engineering Faculty

Palavras-Chave #Spectral Method #Density-dependent Flow #Macrodispersivity #Effective Hydraulic Conductivity
Tipo

Journal Article