中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions

文献类型:期刊论文

作者Gong, Tiexiong1,2,3; Zhu, Yuanjun1,2,3; Shao, Ming'an1,2,3,4
刊名JOURNAL OF HYDROLOGY
出版日期2018-08-01
卷号563页码:811-817
ISSN号0022-1694
关键词Rock fragment Runoff and sediment discharge Sediment concentration Soil loss
DOI10.1016/j.jhydrol.2018.06.054
通讯作者Zhu, Yuanjun(zhuyj@nwsuaf.edu.cn)
英文摘要Quantifying the role of embedded-rock fragments in soil-water processes on a slope is crucial for the application of rock fragments in soil and water conservation practice. In this study, a laboratory runoff and erosion experiment was conducted in the soils embedded with rock fragments (including five rock fragment contents (RC) of 0, 0.1, 0.2, 0.3, and 0.4 kg kg(-1)) in a metal flume under three slopes (5 degrees, 10 degrees, and 15 degrees). Results showed that the mean steady infiltration rate in the soil without rock fragment (NULL) was lower than that in the soils containing rock fragments (low rock fragment contents of 0.1-0.2 kg kg(-1) and high rock fragment contents of 0.3-0.4 kg kg(-1), labelled as LOW and HIGH, respectively) as slope gradient = 5 degrees, but was higher than the latter two soils as slope gradients = 10 degrees and 15 degrees. Initial infiltration rate significantly increased with RC (P < 0.05). Runoff discharge was negatively related to RC as slope gradient = 5 degrees and was positively related to it as slope gradients = 10 degrees and 15 degrees. There was a steady sediment concentration (SC) after runoff generated as slope gradient = 5 degrees. Sediment discharge and soil erosion modulus for the treatment of HIGH significantly increased with slope gradient (P < 0.05). Reynolds number (Re) decreased with RC and the other hydraulic parameters of friction coefficient (f), shear stress (tau), and stream power (omega) increase with RC. In general, the embedded-rock fragment in the soil can accelerate soil erosion by changing the ratio of infiltration/runoff, surface roughness, and related hydraulic parameters, especially under higher slope gradients. Our findings suggest that using rock fragments to control soil erosion is workable only under the conditions of lower slope gradients and rock fragment contents.
WOS关键词OVERLAND-FLOW ; SPATIAL-DISTRIBUTION ; SEDIMENT TRANSPORT ; INTERRILL RUNOFF ; NET DEPOSITION ; COVER ; INFILTRATION ; SURFACE ; HYDRAULICS ; HILLSLOPES
资助项目National Natural Science Foundation of China[41371242] ; National Natural Science Foundation of China[41530854] ; Key Research Program of the Chinese Academy of Sciences[KFZD-SW-306]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000441492700065
资助机构National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/54428]  
专题中国科学院地理科学与资源研究所
通讯作者Zhu, Yuanjun
作者单位1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714
Gong, Tiexiong,Zhu, Yuanjun,Shao, Ming'an. Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions[J]. JOURNAL OF HYDROLOGY,2018,563:811-817.
APA Gong, Tiexiong,Zhu, Yuanjun,&Shao, Ming'an.(2018).Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions.JOURNAL OF HYDROLOGY,563,811-817.
MLA Gong, Tiexiong,et al."Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions".JOURNAL OF HYDROLOGY 563(2018):811-817.

入库方式: OAI收割

来源:地理科学与资源研究所

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