Soil erosion of unpaved loess roads subjected to an extreme rainstorm event: a case study of the Jiuyuangou watershed on the Loess Plateau, China

doi:10.1007/s11629-018-5211-z

	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 Bo 1,4; Wang Wen-long 1,2,3; Guo Ming-ming 1; Guo Wen-zhao 1; Wang Wen-xin 1; Kang Hong-liang 1; Zhao Man 1; Chen Zhuo-xin 1
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019-06-01
卷号	16 期号:6 页码:1396-1407
关键词	Road erosion "7 26" extreme rainstorms Loess Plateau Gully development
ISSN号	1672-6316
DOI	10.1007/s11629-018-5211-z
通讯作者	Wang Wen-long(nwafu_wwl@163.com)
英文摘要	Rainfall 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.
资助项目	National Key Research and Development Program of China[2016YFC0501604] ; National Natural Science Foundation of China[40771127]
WOS关键词	FOREST ROADS ; SEDIMENT PRODUCTION ; RUNOFF ; IDAHO
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000471607300013
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/58733]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang Wen-long
作者单位	1.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
推荐引用方式 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.