潜水作用下土壤水盐运移过程

Soil water and salt transport affected by shallow groundwater

以土壤耕层与临界潜水埋深为界,潜水埋深与土壤水相互作用分为3种情况。本文系统讨论了各种潜水埋深条件下,潜水与土壤水相互作用的原理及过程。土壤水与潜水相互作用的研究离不开土壤水盐运移数值模型,根据模型导出机理的不同将土壤水盐运移模型分为经验模型、半经验—半机理模型与机理模型3类。以相关模型为例,评述了各模型在实际应用中的优缺点,为模型在实际生产生活中选择应用提供依据。利用数学模型,讨论分析了人工控制潜水作用下土壤水盐运移动态并反演相关土壤性质参数,旨在为水盐运移模型研究提供理论支持。

In terms of the interaction between shallow groundwater and soil water,shallow groundwater conditions can be divided into the level at root zone,the level between root zone and critical groundwater depth,and the level lower than critical groundwater depth,respectively.This review discussed principles and processes of the interactions under various groundwater depths.Numerical modeling of soil water and salt transport had been proved to be an essential tool for studying the interactions between groundwater and soil water.Numerical models were divided into empirical model,semi-empirical and semi-mechanism model and mechanism model by the mechanism of model derivation.Some relevant models were listed and the advantages and disadvantages of each model in application were discussed.Dynamics of soil water and salt under controlled shallow groundwater tables and inversed parameters of soil properties were also investigated by using mathematic models,which would provide a theoretical support for soil water and salt modeling.