Solute Transport in Large Scale Heterogeneous Aquifers

• Main Authors: Huang, Chung-Lang, 黃崇琅
• Other Authors: Lee Cheng-Haw
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/86690190808242770429

碩士 === 國立成功大學 === 資源工程學系 === 86 === In this study, a stochastic quasilinear theory developed by Neuman and Zhang(1990) is applied to solve solute transport problems in large scale aquifers with spatial heterogeneity of hydraulic conductivity. Quasilinear expressions for the time- dependent macrodispersivity and spatial covariance in three- dimensional, statistically homogeneous, anisotropic porous media under an exponential covariance of logarithmic hydraulic conductivity are derived. And then, the asymptotic expressions for the macrodispersivity and spatial covariance tensors are derived for some special cases. Since the expressions derived are quasilinear and general analytic solutions of macrodispersivity and spatial covariance are difficult to solve, an iterative scheme and the numerical integration are used to investigate the influences of effective Peclet number and anisotropy of hydraulic conductivity covariance on macrodispersivity , spatial covariance, macrodispersion, and total spatial covariance tensors. Finally, the application of the theory to the logarithmic K data in Borden site is studied. The result indicates a best fit without any parameter adjustment.