Modeling soil detachment capacity by rill flow using hydraulic parameters

doi:10.1016/j.jhydrol.2016.02.013

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	Modeling soil detachment capacity by rill flow using hydraulic parameters
	Nan Shen 2; Zhanli Wang 1,2; Dongdong Wang 2; Hao Chen 2
刊名	Journal of Hydrology
	2016
卷号	535 期号:0 页码:473-479
关键词	Soil Detachment Capacity Rill Flow Hydraulic Parameter Loess Hillslope
DOI	10.1016/j.jhydrol.2016.02.013
文献子类	Article
英文摘要	The relationship between soil detachment capacity (Dc) by rill flow and hydraulic parameters (e.g., flow velocity, shear stress, unit stream power, stream power, and unit energy) at low flow rates is investigated to establish an accurate experimental model. Experiments are conducted using a 4 0.1 m rill hydraulic flume with a constant artificial roughness on the flume bed. The flow rates range from 0.22 10 3 m2 s 1 to 0.67 10 3 m2 s 1, and the slope gradients vary from 15.8% to 38.4%. Regression analysis indicates that the Dc by rill flow can be predicted using the linear equations of flow velocity, stream power, unit stream power, and unit energy. Dc by rill flow that is fitted to shear stress can be predicted with a power function equation. Predictions based on flow velocity, unit energy, and stream power are powerful, but those based on shear stress, especially on unit stream power, are relatively poor. The prediction based on flow velocity provides the best estimates of Dc by rill flow because of the simplicity and availability of its measurements. Owing to error in measuring flow velocity at low flow rates, the predictive abilities of Dc by rill flow using all hydraulic parameters are relatively lower in this study compared with the results of previous research. The measuring accuracy of experiments for flow velocity should be improved in future research.
语种	英语
WOS记录号	WOS:000373421500040
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7818]
专题	水土保持研究所_水保所科研产出--SCI_2016--SCI
通讯作者	Zhanli Wang
作者单位	1.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
推荐引用方式 GB/T 7714	Nan Shen,Zhanli Wang,Dongdong Wang,et al. Modeling soil detachment capacity by rill flow using hydraulic parameters[J]. Journal of Hydrology,2016,535(0):473-479.
APA	Nan Shen,Zhanli Wang,Dongdong Wang,&Hao Chen.(2016).Modeling soil detachment capacity by rill flow using hydraulic parameters.Journal of Hydrology,535(0),473-479.
MLA	Nan Shen,et al."Modeling soil detachment capacity by rill flow using hydraulic parameters".Journal of Hydrology 535.0(2016):473-479.