sedimentloadchangewitherosionprocessesundersimulatedrainfallevents

	sedimentloadchangewitherosionprocessesundersimulatedrainfallevents
	Sun Liying 4; Fang Haiyan 5; Cai Qiangguo 5; Yang Xihua 2; He Jijun 3; Zhou John L 1; Wang Xunming 5
刊名	journalofgeographicalsciences
	2019
卷号	29 期号:6 页码:1001
ISSN号	1009-637X
英文摘要	It is of great significance to quantify sediment load changing with erosion processes for improving the precision of soil loss prediction. Indoor rainfall experiments were conducted in 2 rainfall intensities(90 mm·h~(-1) and 120 mm·h~(-1)), four slope gradients(17.60%, 26.80%, 36.40%, 46.60%) and 2 slope lengths(5 m, 10 m). Erosion processes are divided into five stages. Results show that sediment yield is mainly sourced from rill erosion, contributing from 54.60% to 95.70% and the duration of which is extended by slope gradients. Sediment load and sediment concentration are significantly different along erosion stages, with the highest values in rill development stage(S_(IV)). Surface flow velocities(interrill and rill) demonstrate less significant differences along erosion stages. Rainfall intensity increases sediment load in all stages, with up to 12.0 times higher when changing from 90 to 120 mm·h~(-1). There is an increasing trend for sediment load and sediment concentration with the rising slope gradient, however, fluctuations existed with the lowest values on 26.80% and 36.40%, respectively, among different treatments. The slope gradient effects are enhanced by rainfall intensity and slope length. Results from this study are important for validating and improving hillslope erosion modelling at each erosion stage.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/128096]
专题	中国科学院地理科学与资源研究所
作者单位	1.悉尼科技大学 2.New South Wales Office of Environment and Heritage 3.首都师范大学 4.中国科学院水土保持研究所 5.中国科学院地理科学与资源研究所
推荐引用方式 GB/T 7714	Sun Liying,Fang Haiyan,Cai Qiangguo,et al. sedimentloadchangewitherosionprocessesundersimulatedrainfallevents[J]. journalofgeographicalsciences,2019,29(6):1001.
APA	Sun Liying.,Fang Haiyan.,Cai Qiangguo.,Yang Xihua.,He Jijun.,...&Wang Xunming.(2019).sedimentloadchangewitherosionprocessesundersimulatedrainfallevents.journalofgeographicalsciences,29(6),1001.
MLA	Sun Liying,et al."sedimentloadchangewitherosionprocessesundersimulatedrainfallevents".journalofgeographicalsciences 29.6(2019):1001.