采煤沉陷区冻结滞水消融过程中土壤水分变化规律

发布时间：2018-03-16 23:07

本文选题：冻结滞水　切入点：土壤含水率　出处：《土壤》2017年03期 　论文类型：期刊论文

【摘要】：冻结滞水的倒置富水性和双向融化特性,使其消融过程中土壤水分迁移动向发生变化。采用烘干法,对采煤沉陷区不同立地类型冻结滞水消融过程中的土壤含水率进行了测定。结果表明:(1)随着融化时间的延长,采煤沉陷区阴坡土壤含水率峰值沿着垂直方向逐渐向下推移。冻结滞水融化第2天和第5天,土壤含水率峰值出现在0~10 cm土层;融化第8天土壤含水率最大值出现在20~30 cm土层;融化第11、14和17天土壤含水率最大值均出现在50~60 cm土层;(2)采煤沉陷区沟坡地冻结滞水融化第2天和第5天土壤含水率峰值均出现在20~30 cm土层;融化第8、11、14和17天土壤含水率最大值均出现在30~40 cm土层;(3)采煤区和非采煤区的冻结滞水含水率峰值在冻土层之下。
[Abstract]:The inverted water-rich and bi-directional melting characteristics of frozen stagnant water change the migration of soil water during the process of melting. The soil moisture content of different site types in coal mining subsidence area during the process of frozen water ablation was measured. The results showed that the water content of the soil was increased with the prolongation of melting time. The peak value of soil moisture content in shady slope of coal mining subsidence area was gradually downward along the vertical direction. On the 2nd and 5th day, the peak value of soil moisture content appeared in 0 ~ 10 cm soil layer and 20 ~ 30 cm soil layer on the 8th day of melting. On the 14th and 17th day of melting, the maximum value of soil moisture content appeared in the soil layer of 50 ~ 60 cm soil layer, respectively) the peak value of soil moisture content appeared in 2030 cm soil layer on the 2nd and 5th day after freezing stagnant water in gully slope area of coal mining subsidence area. The maximum value of soil moisture content on the 14th and 17th day of melting appeared in the 30 ~ 40 cm soil layer and in the non-mining area, the peak value of frozen water hysteretic water content was below the frozen soil layer.
【作者单位】：内蒙古农业大学沙漠治理学院;中国林业科学研究院沙漠林业实验中心;内蒙古自治区水土保持工作站;内蒙古自治区水利水电勘测设计院;
【基金】：内蒙古自治区科学基金重大项目(2014ZD03)资助
【分类号】：S152.7

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