溶质降解和生成对水盐运移的影响

摘要/Abstract

摘要： 土壤盐渍化是土地荒漠化的主要类型之一,是干旱、半干旱地区土地退化的主要形式,水盐运移是研究土壤盐渍化的主要内容。土壤中的水盐运移是一个集物理、化学和生物反应的复杂过程,溶质降解和生成必然对水盐运移过程产生影响,但目前对此方面的研究很少。通过利用水盐运移两区模型对不同降解系数或溶质生成系数下穿透曲线的模拟分析,研究了降解和溶质生成对水盐运移的影响。结果表明,在水盐运移过程中,土壤溶液浓度会随着土壤降解系数的增加而降低,随着土壤溶质生成系数的增大而增大。

关键词: 降解, 溶质生成, 两区模型, 水盐运移

Abstract: Soil salinization is one of the main types of desertification, and is a main form of land degradation in arid and semiarid areas. Water and salt migration in soil is the major content in the study of the soil salinization. Solute transport is a complex process which is related to physical, chemical and biological reactions. However, research on the influence of the solute degradation and production on solution transport is still rare. In this paper, we study the influence of solute degradation and production on solution transport by simulating the breakthrough curves of different values of solute degradation or production. The results show that the solution concentration will decrease with the increment of the degradation coefficient in solute transport, and increase with the increment of the production coefficient.

Key words: degradation, solution production, two-region model, solute transport

中图分类号:

S156.41

胡五龙;黄宁*. 溶质降解和生成对水盐运移的影响[J]. 中国沙漠, 2011, 31(3): 672-677.

HU Wu-long;HUANG Ning. Influence of Solute Degradation and Production on Water and Salt Migration[J]. JOURNAL OF DESERT RESEARCH, 2011, 31(3): 672-677.

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