期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Relationship between soil surface roughness and hydraulic roughness coefficient on sloping farmland 被引量:2
1
作者 Zi-cheng ZHEN Shu-qin HE fa-qi wu 《Water Science and Engineering》 EI CAS 2012年第2期191-201,共11页
The soil surface roughness and hydraulic roughness coefficient are important hydraulic resistance characteristic parameters. Precisely estimating the hydraulic roughness coefficient is important to understanding mecha... The soil surface roughness and hydraulic roughness coefficient are important hydraulic resistance characteristic parameters. Precisely estimating the hydraulic roughness coefficient is important to understanding mechanisms of overland flow. Four tillage practices, including cropland raking, artificial hoeing, artificial digging, and straight slopes, were considered based on the local agricultural conditions to simulate different values of soil surface roughness in the Loess Plateau. The objective of this study was to investigate the relationship between the soil surface roughness and hydraulic roughness coefficient on sloping farmland using artificial rainfall simulation. On a slope with a gradient of 10°, a significant logarithmic function was developed between the soil surface roughness and Manning's roughness coefficient, and an exponential function was derived to describe the relationship between the soil surface roughness and Reynolds number. On the slope with a gradient of 15°, a significant power function was developed to reflect the relationship between the soil surface roughness and Manning's roughness coefficient, and a linear function was derived to relate the soil surface roughness to the Reynolds number. These findings can provide alternative ways to estimate the hydraulic roughness coefficient for different types of soil surface roughness. 展开更多
关键词 soil hydraulics sloping farmland soil erosion soil surface roughness hydraulic roughness coefficient Reynolds number tillage practice
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部