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Evaluating and modelling splash detachment capacity based on laboratory experiments
Wu, Bing1; Wang, Zhanli2,3; Zhang, Qingwei2; Shen, Nan2; Liu, June4
2019-05-01
Source PublicationCATENA
ISSN0341-8162
Volume176Pages:189-196
Corresponding AuthorWang, Zhanli(zwang@nwsuaf.edu.cn)
AbstractSplash erosion is recognized as an important process of water erosion on agricultural land, but evaluating and modelling splash detachment capacity on steep slopes using loessial soil were not fully studied. The objectives of this study are: (1) to evaluate the effects of slope gradient (S) and rainfall intensity (I) on splash detachment capacity (SDr), (2) to select the key rainfall physical parameters and hydraulic parameters affecting splash detachment capacity, (3) to establish new and more accurate experimental models between splash detachment capacity (SDr) and these key parameters on steep slopes for loess regions. The experiment was conducted at slopes of 12.23%, 17.63%, 26.8%, 36.4%, 40.4% and 46.63% under rainfall intensities of 48, 60, 90, 120, 138 and 150 mm h(-1) , respectively, using simulated rainfall. Results showed that the equation between splash detachment capacity (SDr) with both parameters of rainfall intensity (I) and slope gradient (S) (i.e. SDr = 0.000126 In (0.36S(-0.3)I(1.3) - 14)) could predict SDr well with R-2 = 0.85 and Nash-Sutcliffe model efficiency (NSE) = 0.71. SDr was more sensitive to rainfall intensity than to slope gradient. The rainfall kinetic energy (KE) was the key rainfall physical parameter and the mean flow depth (h) was the key hydraulic parameter affecting SDr. The equation between SDr with both parameters of KE and h (i.e. SDr = 0.000164 In (0.0031KE(1.13) h(-0.3) - 4.5)) could satisfactorily predict SDr with R-2 = 0.85 and Nash-Sutcliffe model efficiency (NSE) = 0.81. The new equations (i.e. SDr = 0.000126 ln (0.36S(-0.3)I(1.3) - 14) and SDr = 0.000164 In (0.0031KE(1.13)h(-0.3) - 4.5)) could help in controlling water erosion in the loess region of China.
KeywordSplash detachment capacity Rainfall intensity Slope gradient Rainfall kinetic energy Flow depth
DOI10.1016/j.catena.2019.01.009
WOS KeywordSOIL-EROSION ; RAINFALL INTENSITY ; SEDIMENT TRANSPORT ; RAINDROP-IMPACT ; KINETIC-ENERGY ; SHEET EROSION ; STEEP SLOPES ; LOESS ; FLOW
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41471230] ; National Natural Science Foundation of China[41830758] ; National Natural Science Foundation of China[41601282] ; National Natural Science Foundation of China[41171227] ; National Key Research and Development Program of China[2016YFC0402401] ; National Key Research and Development Program of China[2017YFD0800502] ; 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 AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000462107000016
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/48590
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Zhanli
Affiliation1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Civil Engn, Xian 710049, 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.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
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. Evaluating and modelling splash detachment capacity based on laboratory experiments[J]. CATENA,2019,176:189-196.
APA Wu, Bing,Wang, Zhanli,Zhang, Qingwei,Shen, Nan,&Liu, June.(2019).Evaluating and modelling splash detachment capacity based on laboratory experiments.CATENA,176,189-196.
MLA Wu, Bing,et al."Evaluating and modelling splash detachment capacity based on laboratory experiments".CATENA 176(2019):189-196.
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