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Modelling sheet erosion on steep slopes in the loess region of China
Wu, Bing1,3; Wang, Zhanli1,2; Zhang, Qingwei2; Shen, Nan2; Liu, June4
2017-10-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume553Pages:549-558
Corresponding AuthorWang, Zhanli(zwang@nwsuaf.edu.cn)
AbstractThe 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.
KeywordSheet erosion rate Rainfall intensity Slope gradient Flow velocity Hydrodynamic parameters
DOI10.1016/j.jhydrol.2017.07.017
WOS KeywordSEDIMENT TRANSPORT CAPACITY ; SOIL-EROSION ; RAINFALL INTENSITY ; INTERRILL EROSION ; ERODING RILLS ; FLOW ; GRADIENT ; DETACHMENT ; HILLSLOPE ; PLATEAU
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000412612700043
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/62256
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Zhanli
Affiliation1.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
Recommended Citation
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.
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