globalchange  > 气候变化事实与影响
DOI: 10.1016/j.scitotenv.2018.11.385
WOS记录号: WOS:000455039600029
论文题名:
Effects and mechanisms of erosion control techniques on stairstep cut-slopes
作者: Liu, Gang1,2,3; Hu, Feinan1,2,3; Zheng, Fenli1,2,3; Zhang, Qiong1
通讯作者: Hu, Feinan
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
ISSN: 0048-9697
EISSN: 1879-1026
出版年: 2019
卷: 656, 页码:307-315
语种: 英语
英文关键词: Steep slope ; Soil erosion ; Infiltration ; Water content ; Shear strength ; Sediment loss
WOS关键词: SOIL-EROSION ; LOESS PLATEAU ; LAND-USE ; CLIMATE-CHANGE ; VEGETATION ; RAINFALL ; RUNOFF ; STABILIZATION ; PARAMETERS ; SUBSTRATE
WOS学科分类: Environmental Sciences
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

Many erosion control techniques, such as stone pitching, concrete revetment, and geotextile covering, have been effective at protecting cut slopes along roads or railways. However, these methods are expensive and hard to operate for high stairstep cut-slopes. To investigate the efficiency of several easily implemented and low-cost techniques, five plots with different treatments were built on stairstep cut-slopes. The five treatments consisted of vegetation coverage on platforms, counter-slope on platforms, upslope drainage, a control check (CK), and a comprehensive treatment of the first three techniques. During nineteen recorded rainfall events from June 2015 to August 2016, the runoff and sediment amount of each plot was measured. Soil water content and shear strength of the 2-m depth profile at each plot after the occurrence of rainfall and evapotranspiration were also investigated. The results indicated that runoff and the sediment amount from the five plots increased with an increase in rainfall amount with a threshold of 5 mm rainfall to produce sediment loss. Compared with the CK, the comprehensive and upslope drainage treatments had a larger reduction in runoff and sediment amount than those of the vegetation and counter-slope treatments. After either rainfall or evapotranspiration, the vegetation and comprehensive treatments had the highest soil water content, and the upslope drainage treatment had the lowest soil water content. The infiltration capacity followed the order of upslope drainage < CK < counter-slope < vegetation < comprehensive treatment. The shear strength of soil logarithmically decreased with soil water content in the five plots, and a critical water content of 12% determined the rate of change for shear strength. Finally, the upslope drainage technique was determined as the preferred recommendation to protect high stairstep cut-slopes. (C) 2018 Elsevier B.V. All rights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/132109
Appears in Collections:气候变化事实与影响

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作者单位: 1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China

Recommended Citation:
Liu, Gang,Hu, Feinan,Zheng, Fenli,et al. Effects and mechanisms of erosion control techniques on stairstep cut-slopes[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019-01-01,656:307-315
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