ZHANG Yan,HUANG Yan-he,LIN Jin-shi,et al.Study on Permeability Discrepance and Influence Factors of Different Soil Layers in Collapsing Hill[J].Research of Soil and Water Conservation,2014,21(03):37-40,46.
崩岗不同土层渗透差异及其影响因素研究
- Title:
- Study on Permeability Discrepance and Influence Factors of Different Soil Layers in Collapsing Hill
- 分类号:
- S157.1
- 摘要:
- 崩岗不同土层的水分渗透性能对其土壤侵蚀特征具有重要影响。研究采用“环刀法”对崩壁垂直剖面22个不同深度土层的渗透特性进行了研究。结果表明：崩岗垂直剖面的渗透特性存在较大差异，红土层的渗透性能总体上优于砂土层和碎屑层，表层0.1 m以下存在一层厚度约1 m的弱透水层。对不同土层影响渗透的因子进行回归分析可知，弱透水层影响渗透的主要因子为容重和机械组成，砂土层影响渗透的主要因子为黏粒含量，碎屑层影响渗透的因子主要为机械组成。
- Abstract:
- Soil erosion is influenced by permeability of different soil layers in collapsing hill. In this study, 22 soil samples in different layers were collected, and the permeability of each layer was measured by the metal cylinder method. Results showed that: there were large differences of permeability in various soil layers, red soil layer had a higher permeability than the other two soil layers, There is a relatively impermeable layer about 0.1 meter below the soil surface, and its thickness is about 1 meter. Stepwise regression was used to analyze influence factors on permeability of different soil layers. The main influence factors are bulk density and soil mechanical composition for relatively impermeable layer, and the factors for sandy soil layer and debris layer were clay contents and soil mechanical composition, respectively.
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备注/Memo
收稿日期:2014-01-08;改回日期:2014-02-20。
基金项目:国家自然科学基金资助项目（41001169，40671113）；国家科技支撑项目（2014BAD15B03）
作者简介:张燕(1987-),女,河南信阳人,硕士生,研究方向:土壤侵蚀与治理。E-mail:zhangyan3130@126.com
通讯作者:黄炎和(1962-),男,广东饶平人,博士,教授,研究方向:土壤侵蚀与治理。E-mail:yanhehuang@163.com