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Soil erosion of unpaved loess roads subjected to an extreme rainstorm event: a case study of the Jiuyuangou watershed on the Loess Plateau, China
Yang Bo1,4; Wang Wen-long1,2,3; Guo Ming-ming1; Guo Wen-zhao1; Wang Wen-xin1; Kang Hong-liang1; Zhao Man1; Chen Zhuo-xin1
2019-06-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume16Issue:6Pages:1396-1407
Corresponding AuthorWang Wen-long(nwafu_wwl@163.com)
AbstractRainfall can cause serious soil loss in the Loess Plateau hilly and gully region, but little focus has been placed on the extreme rainstorm effects on unpaved loess road soil erosion. A field survey method was used to investigate the erosional effects of the 7.26 heavy rainfall event on unpaved loess roads in the Jiuyuangou watershed of the Loess Plateau, China. The results showed that the average and maximum widths of the eroded gullies that formed on the unpaved roads were 0.65-1.48 m and 1.00-3.60 m, respectively. The average and maximum depths of the eroded gullies were 0.42-1.13 m and 0.75-4.30 m, respectively. The average width-to-depth ratio was 1.31, indicating that the widening effect was greater than the downcutting effect in the eroded gullies. In addition, the gully density ranged from 0.07 to 0.29 m m(-2), and the road surface dissection degree ranged from 0.03 to 0.41 km(2) km(-2). Eroded gullies generally developed at the slope toe of the cut bank side. The average eroded gully width and depth at turns in the road were 1.47-2.64 times and 1.30-3.47 times greater, respectively, than those in other road sections. The road erosion modulus increased from the upper section to the lower section of the roads. The average road erosion modulus of the study catchment was 235,000 t km(-2). Turns in the road were associated with collapses, sinkholes and other gravitational erosion phenomena. The amount of road erosion under extreme rainfall conditions is mainly related to the interactions among road length, width, slope and soil bulk density. Our results provide a useful reference for developing further measures for preventing road erosion on the Loess Plateau.
KeywordRoad erosion "7 26" extreme rainstorms Loess Plateau Gully development
DOI10.1007/s11629-018-5211-z
WOS KeywordFOREST ROADS ; SEDIMENT PRODUCTION ; RUNOFF ; IDAHO
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0501604] ; National Natural Science Foundation of China[40771127]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000471607300013
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58734
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang Wen-long
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Yulin Univ, Key Lab Ecol Restorat Min Area Northern Shaanxi P, Yulin 719000, Peoples R China
4.Yellow River Engn Consulting Co Ltd, 109 Jinshui Rd, Zhengzhou 450003, Henan, Peoples R China
Recommended Citation
GB/T 7714
Yang Bo,Wang Wen-long,Guo Ming-ming,et al. Soil erosion of unpaved loess roads subjected to an extreme rainstorm event: a case study of the Jiuyuangou watershed on the Loess Plateau, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(6):1396-1407.
APA Yang Bo.,Wang Wen-long.,Guo Ming-ming.,Guo Wen-zhao.,Wang Wen-xin.,...&Chen Zhuo-xin.(2019).Soil erosion of unpaved loess roads subjected to an extreme rainstorm event: a case study of the Jiuyuangou watershed on the Loess Plateau, China.JOURNAL OF MOUNTAIN SCIENCE,16(6),1396-1407.
MLA Yang Bo,et al."Soil erosion of unpaved loess roads subjected to an extreme rainstorm event: a case study of the Jiuyuangou watershed on the Loess Plateau, China".JOURNAL OF MOUNTAIN SCIENCE 16.6(2019):1396-1407.
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