干旱区研究

干旱区研究 ›› 2014, Vol. 31 ›› Issue (2): 222-225.

• 水土资源 • 上一篇    下一篇

土壤初始含盐量对水分入渗特性的影响

任长江1 ，白丹1 ，周文1， 2 ，田济扬1 ，程鹏1， 2 ，梁伟1， 3   

  1. （1．西安理工大学水利水电学院，陕西 西安 710048； 2．华北水利水电学院，河南 郑州 450011； 3．陕西师范大学，陕西 西安 710062）
  • 收稿日期:2013-04-18 修回日期:2013-05-09 出版日期:2014-03-11 发布日期:2014-04-25
  • 作者简介:任长江（1984－），男，博士生，主要从事节水灌溉理论与技术研究.Email: 971932670@qq.com
  • 基金资助:

    国家自然科学基金（51279156，50979089）；高等学校博士学科点专项科研基金联合资助课题(20116118110010);陕西省农业科技攻关项目(2010K02-08)

Effect of Initial Soil Salt Content on Infiltration of Soil Water

  • Received:2013-04-18 Revised:2013-05-09 Published:2014-03-11 Online:2014-04-25

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被引次数

8

摘要： 研究土壤初始含盐量对入渗特性的影响，对盐碱地治理具有重要意义。在室内分别进行初始氯化钠含量为3.6、4.5、5.3、5.7 g•kg-1和9.0 g•kg-1的一维垂直土柱淋洗试验。根据试验数据，采用多元回归法，建立了湿润锋、累积入渗量与时间和土壤含盐量之间的量化关系，回归相关系数分别为0.992、0.922，回归模型拟合程度较好；根据累积入渗量得到了入渗率与时间和土壤含盐量之间的量化关系。实验和分析计算表明：土壤初始含盐量对入渗特性的影响大于时间对入渗特性的影响，相同时间土壤初始含盐量越高，入渗湿润锋、累积入渗量和入渗率值越小。

Abstract: It has a great significance to study the effect of initial soil salt content on the infiltration of soil water for improving salinealkaline soil. A onedimensional vertical leaching experiment was carried out under different initial soil sodium chloride contents (3.6, 4.5, 5.3, 5.7 g•kg-1 and 9.0 g•kg-1) in laboratory. According the experiment data, the quantitative relationships between the wetting front, cumulative infiltration and time and the soil salt content were developed using the multiple regression analysis. The regression correlation coefficients were 0.992 and 0.922, and the fitting results of the regression model were good. According to the cumulative infiltration, the quantitative relationships between the infiltration rate and time and soil salt content were obtained. The analyzed result showed that the effect of initial soil salt content on the infiltration of soil water was higher than that of time. The higher the initial soil salt content was, the lower the values of wetting front, cumulative infiltration and infiltration rate would be.