Characteristics of flow pattern and sediment transport processes on loessal soil slope in western Shanxi Province

被引：0
|
作者：
Fu X. [1 ]
机构：
[1] College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2017年 / 48卷 / 06期
关键词：
Flow pattern; Loessal soil; Rainfall intensity; Runoff volume; Sediment transport rate; Slope length;
D O I：
10.13243/j.cnki.slxb.20160926
中图分类号：
学科分类号：
摘要：
In order to investigate the characteristics of flow pattern and sediment transport processes on loessal soil slope, western Shanxi province, Reynolds number, Froude number, runoff volume, sediment yield and sediment transport rate under different rainfall intensities and slope lengths were measured and analyzed based on the laboratory simulated rainfall events. The results indicate that flow pattern is basically laminar flow and torrential flow on slope lengths 1-5 m under 30-125 mm/h rainfall intensities. The flow pattern has significant impact on runoff erosivity, and there is a good power function relationship between sediment yield and the Reynolds number. Runoff turbulence is stronger with increasing rainfall intensity and slope length, and the sediment transport rate increases with these two factors. However, increment of sediment transport rate with slope length extending from 3 m to 4 m are less than that from 2 m to 3 m and 4 m to 5 m when rainfall intensity greater than 60 mm/h. The relationship between sediment transport rate and runoff volume can be described using power function. The conclusions can provide scientific basis for the control of soil and water loss as well as the construction of soil and water conservation measures on loess plateau slope. © 2017, China Water Power Press. All right reserved.
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页码：738 / 747
页数：9
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