Dynamic mechanics of soil erosion by runoff on loess slope
In this research, soil erosion and sediment yield was calculated by runoff shear stress, runoff energy consumption and runoff power theory respectively. Results indicated that linear relationship was existed between average runoff shear stress and sediment yield, soil erodibility in the experiment was 178.5g/(Pa·min), and the critical shear stress value was 0.54 Pa. Results by energy consumption implied that there was also linear relation between sediment transportation and energy consumption of runoff unit width: Dr＝14.61(ΔE-0.37), which indicated that soil erodibility was 14.61g/J, with critical energy consumption of 0.37J/(min·cm). Results by runoff power theory showed that sediment transportation increased with the increase of runoff power, and simple linear relation was also regressed: Y=8942.2x -68.676. Generally, these three theories showed its advantage in describing soil erosion process on slope, among which results from energy consumption theory was simpler and more accurate, and was more convenient in describing soil erosion on slope.
shear stress runoff energy consumption runoff power soil erosion loess slope words1 words2 words3
Li Peng Wu Yang Li Zhanbin
Xian University of Technology, Xian Shaanxi, 710048 Xian University of Technology, Xian Shaanxi, 710048;Institute of soil and water conservation, Chin
国际会议
西安
英文
1094-1098
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）