An Analytical Solution for Advance of Solute Front in Soils

LIU Chun-Ping; SHAO Ming-An; LU Dian-Qing; XIA Wei-Sheng; CAI Song-Bai

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An Analytical Solution for Advance of Solute Front in Soils

机译：土壤中溶质锋进展的解析解

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Based on the assumption that solute transport in a semi-infinite soil column or in a field soil profile can be described by the boundary-layer method, an analytical solution is presented for the advance of a solute front with time. The traditional convection-dispersion equation (CDE) subjected to two boundary conditions: 1) at the soil surface (or inlet boundary)and 2) at the solute front, was solved using a Laplace transformation. A comparison of resident concentrations using a boundary-layer method and an exact solution (in a semi-infinite-domain) showed that both were in good agreement within the range between the two boundaries. This led to a new method for estimating solute transport parameters in soils, requiring only observation of advance of the solute front with time. This may be corroborated visually using a tracer solution with marking-dye or measured utilizing time domain refiectometry (TDR). This method is applicable to both laboratory soil columns and field soils. Thus, it could be a step forward for modeling solute transport in field soils and for better understanding of the transport processes in soils.

机译：基于边界层法可以描述半无限土柱或田间土壤剖面中溶质运移的假设，提出了随时间变化的溶质锋的解析解。传统的对流弥散方程（CDE）受到两个边界条件的约束：1）在土壤表面（或入口边界）和2）在溶质前沿的条件下，使用拉普拉斯变换求解。使用边界层方法和精确解（在半无限域中）进行的居民浓度比较显示，两者在两个边界之间的范围内吻合良好。这导致了一种估算土壤中溶质运移参数的新方法，只需要观察溶质锋随时间的变化即可。可以使用带有标记染料的示踪剂溶液在视觉上证实这一点，或者使用时域反射光度法（TDR）进行测量。此方法适用于实验室土壤柱和田间土壤。因此，对于模拟田间土壤中的溶质运移和更好地了解土壤中的运移过程，这可能是向前迈出的一步。

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来源
《土壤圈（英文版）》 |2004年第3期|339-346|共8页
作者
LIU Chun-Ping; SHAO Ming-An; LU Dian-Qing; XIA Wei-Sheng; CAI Song-Bai;
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作者单位

Department of Resource and Environment Science, Hunan Normal University, Changsha 410006 (China);

Institute of Geographical Sciences and Natural Resources Research, Beijing 100101 (China);

Institute of Geographical Sciences and Natural Resources Research, Beijing 100101 (China);

Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100 (China);

Department of Resource and Environment Science, Hunan Normal University, Changsha 410006 (China);

Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100 (China);

Department of Resource and Environment Science, Hunan Normal University, Changsha 410006 (China);

Department of Resource and Environment Science, Hunan Normal University, Changsha 410006 (China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
analytical solution; parameter estimation; solute front; solute transport;

机译：解析溶液;参数估计;溶质锋;溶质运移;

An Analytical Solution for Advance of Solute Front in Soils

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