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

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.6

	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; Wang Wen-long; Guo Ming-ming; Guo Wen-zhao; Wang Wen-xin; Kang Hong-liang; Zhao Man; Chen Zhuo-xin
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
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
文献子类	Article
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.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000471607300013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46517]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.6
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.