Modelling sheet erosion on steep slopes in the loess region of China

doi:10.1016/j.jhydrol.2017.07.017

	Modelling sheet erosion on steep slopes in the loess region of China
	Wu, Bing 1,3; Wang, Zhanli 1,2; Zhang, Qingwei 2; Shen, Nan 2; Liu, June 4
刊名	JOURNAL OF HYDROLOGY
	2017-10-01
卷号	553 页码:549-558
关键词	Sheet erosion rate Rainfall intensity Slope gradient Flow velocity Hydrodynamic parameters
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2017.07.017
通讯作者	Wang, Zhanli(zwang@nwsuaf.edu.cn)
英文摘要	The relationship of sheet erosion rate (SE), slope gradient (S) and rainfall intensity (I), and hydraulic parameters, such as flow velocity (V), shear stress (tau), stream power (Omega) and unit stream power (P), was investigated to derive an accurate experimental model. The experiment was conducted at slopes of 12.23%, 17.63%, 26.8%, 36.4%, 40.4% and 46.63% under I of 48, 60, 90, 120, 138 and 150 mm h(-1), respectively, using simulated rainfall. Results showed that sheet erosion rate increased as a power function with rainfall intensity and slope gradient with R-2 = 0.95 and Nash-Sutcliffe model efficiency (NSE) = 0.87. Sheet erosion rate was more sensitive to rainfall intensity than to slope gradient. It increased as a power function with flow velocity, which was satisfactory for predicting sheet erosion rate with R-2 = 0.95 and NSE = 0.81. Shear stress and stream power could be used to predict sheet erosion rate accurately with a linear function equation. Stream power (R-2 = 0.97, NSE = 0.97) was a better predictor of sheet erosion rather than shear stress (R-2 = 0.90, NSE = 0.89). However, a prediction based on unit stream power was poor. The new equation (i.e. SE = 7.5 x 10(12)S(1.43)I(3.04) and SE = 0.06 Omega - 0.0003 and SE = 0.011 tau - 0.01) would improve water erosion estimation on loess hillslopes of China. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41471230] ; National Natural Science Foundation of China[41601282] ; National Natural Science Foundation of China[41171227] ; National Key Research and Development Program of China[2016YFC0402401] ; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-C2]
WOS关键词	SEDIMENT TRANSPORT CAPACITY ; SOIL-EROSION ; RAINFALL INTENSITY ; INTERRILL EROSION ; ERODING RILLS ; FLOW ; GRADIENT ; DETACHMENT ; HILLSLOPE ; PLATEAU
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000412612700043
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/62255]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Zhanli
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wu, Bing,Wang, Zhanli,Zhang, Qingwei,et al. Modelling sheet erosion on steep slopes in the loess region of China[J]. JOURNAL OF HYDROLOGY,2017,553:549-558.
APA	Wu, Bing,Wang, Zhanli,Zhang, Qingwei,Shen, Nan,&Liu, June.(2017).Modelling sheet erosion on steep slopes in the loess region of China.JOURNAL OF HYDROLOGY,553,549-558.
MLA	Wu, Bing,et al."Modelling sheet erosion on steep slopes in the loess region of China".JOURNAL OF HYDROLOGY 553(2017):549-558.