An in situ method to measure the longitudinal and transverse dispersion coefficients of solute transport in soil
文献类型: 外文期刊
第一作者: Zhang, Xiaoxian
作者: Zhang, Xiaoxian;Qi, Xuebin;Zhou, Xinguo;Pang, Hongbin
作者机构:
关键词: longitudinal dispersion;transverse dispersion;in situ method;solute transport;analytical solution;triple-ring infiltrometer;HETEROGENEOUS POROUS-MEDIA;FIELD-SCALE TRANSPORT;LATTICE BOLTZMANN MODEL;INTERACTING SOLUTES;ANOMALOUS TRANSPORT;SPATIAL VARIABILITY;UNSATURATED ZONE;SAND;EQUATION
期刊名称:JOURNAL OF HYDROLOGY ( 影响因子:5.722; 五年影响因子:6.033 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: The knowledge of hydraulic conductivity and solute transport parameters of topsoil is important in a variety of fields and their measurement has been an interest in both theory and practice. In this paper we present an in situ method to measure the longitudinal and transverse dispersion coefficients of solute movement by modifying the double-ring infiltrometer into a triple-ring infiltrometer. Water flow in the apparatus is controlled in one dimension and solute movement in three dimensions. The solute transport parameters can be measured simultaneously with the hydraulic conductivity. Analytical solutions are derived to describe the solute movement, and field experiment was carried out to calculate the solute parameters in homogeneous soil using a simple method developed based on the analytical solutions. Simulating results using these estimated parameters predict the observed breakthrough curves reasonably well. (c) 2006 Elsevier B.V. All rights reserved.
分类号: P33
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