期刊论文

Difference Analysis of Temperature Effect on Water Characteristic Curves of Red Soil and Paddy Soil in South China

中文

水土保持学报

1009-2242

2019

33

5

72-78,84

10.13870/j.cnki.stbcxb.2019.05.011

国家自然科学基金项目(41471185) 湖南省重点研发计划项目(2016JC2032) 湖南省教育厅科学研究重点项目(15A084)。

本校为第一机构

为了研究温度变化对土壤水分特征曲线的影响,采用高速离心机法测定南方红壤和水稻土在4,12, 20,28,36℃温度条件下土体脱湿过程的水分特征曲线,并运用VG模型进行参数提取,探讨了温度对土壤当量孔径分布、非饱和导水率及水分扩散度等参数的影响。结果表明:相同水势条件下红壤和水稻土的含水率随温度增加而显著减少(P12℃>20℃>28℃>36℃的关系,且同一温度下的红壤持水性能显著高于水稻土(P

In order to study the effect of temperature changes on soil water characteristic curve,the water characteristic curves of red soil and paddy soil in South China were measured by high-speed centrifuge at 4, 12,20,28 and 36℃respectively.The parameters were extracted by VG model,and the effects of temperature on soil equivalent pore size distribution,unsaturated hydraulic conductivity and water diffusivity were discussed.The results showed that the water contents of red soil and paddy soil decreased significantly with the increase of temperature ...