期刊论文

Effects of Loess Soil Texture on Raindrop Splash

中文

水土保持研究

Research of Soil and Water Conservation

1005-3409

2016

23

5

1-6

10.13869/j.cnki.rswc.2016.05.001

国家自然科学基金面上项目(41471229； 41271304)； 黄土高原土壤侵蚀与旱地农业国家重点实验室开放资助项目(A314021402-1518)；

本校为其他机构

土壤质地是土粒溅蚀量及溅出方式的重要影响因素。以黄土高原4种土壤(土、黑垆土、砂黄土、黄绵土)为试验用土,通过人工模拟降雨试验研究了黄土土质对溅蚀量、溅出土粒颗粒组成的影响。结果表明:(1)溅蚀量随降雨历时增加呈幂函数趋势增加。降雨开始时溅蚀量取决于土表松散颗粒含量及土粒均匀程度。随后溅蚀量增加速率则取决于黏粒(0.25mm颗粒含量高的土壤溅出土粒粒径分布均匀,而>0.25mm颗粒含量低的土壤溅出土粒集中分布于粗粉粒、细砂粒粒级内。(3)通过溅出土粒实际与原始颗粒含量的比值可判断土壤颗粒溅出方式。供试土壤黏粒、细粉粒、粗粉粒(0.02~0.05mm)的实际与原始颗粒含量比值1,以团粒形...

Soil texture is one of the important factors on raindrop splash erosion and the form of particles splashed out.Rainfall simulation experiments with four loess soils of Lou soil,dark loessial soil,sandy loess,loessial soil,were performed to evaluate effects of soil texture on raindrop splash erosion and splashed particle size distribution (PSD).The results showed that:(1)power function were the best function to describe the splash erosion increases with the rainfall duration,at the beginning of rainfall,the raindrop splash erosion depends on the amount of loose particles on soil surface and the...