Effects of freeze-thaw on soil erosion processes and sediment selectivity under simulated rainfall

doi:10.1007/s40333-017-0009-3

	Effects of freeze-thaw on soil erosion processes and sediment selectivity under simulated rainfall
	Wang Tian 1; Li Peng 1; Ren Zongping 1; Xu Guoce 1; Li Zhanbin 1,2; Yang Yuanyuan 1; Tang Shanshan 1; Yao Jingwei 1
刊名	JOURNAL OF ARID LAND
	2017-04-01
卷号	9 期号:2 页码:234-243
关键词	freeze-thaw erosion loess soil soil erodibility runoff sediment size selectivity rainfall simulation
ISSN号	1674-6767
DOI	10.1007/s40333-017-0009-3
通讯作者	Xu Guoce(xuguoce@xaut.edu.cn)
英文摘要	The freeze-thaw (FT) processes affect an area of 46.3% in China. It is essential for soil and water conservation and ecological construction to elucidate the mechanisms of the FT processes and its associated soil erosion processes. In this research, we designed the control simulation experiments to promote the understanding of FT-water combined erosion processes. The results showed that the runoff of freeze-thaw slope (FTS) decreased by 8% compared to the control slope (CS), and the total sediment yield of the FTS was 1.10 times that of the CS. The sediment yield rate from the FTS was significantly greater than that from the CS after 9 min of runoff (P < 0.01). Both in FTS and CS treatments, the relationships between cumulative runoff and sediment yield can be fitted well with power functions (R-2 > 0.98, P < 0.01). Significant differences in the mean weight diameter (MWD) values of particles were observed for washed particles and splashed particles between the CS and the FTS treatments in the erosion process (P < 0.05). The mean MWD values under CS were smaller than those under FTS for both washed and splashed particles. The ratio of the absolute value of a regression coefficient between the CS and the FTS was 1.15, being roughly correspondent with the ratio of K between the two treatments. Therefore, the parameter a of the power function between cumulative runoff and sediment yield could be an acceptable indicator for expressing the soil erodibility. In conclusion, the FTS exhibited an increase in soil erosion compared to the CS.
资助项目	National Basic Research Program of China[2016YFC040240X] ; National Natural Science Foundation of China[41471226] ; National Natural Science Foundation of China[41330858] ; Independent Research Foundation of State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area[2016KFKT-8]
WOS关键词	PARTICLE-SIZE DISTRIBUTION ; AGGREGATE STABILITY ; ERODED SEDIMENT ; STEEP SLOPES ; RUNOFF ; CHINA ; ERODIBILITY ; YIELD ; RILL ; CONSTRUCTION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000396210500007
资助机构	National Basic Research Program of China ; National Natural Science Foundation of China ; Independent Research Foundation of State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/64615]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu Guoce
作者单位	1.Xian Univ Technol, State Key Lab Base Ecohydraul Engn Arid Area, Xian 710048, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, State Key Lab Soil Eros & Dry Land Farming Loess, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
推荐引用方式 GB/T 7714	Wang Tian,Li Peng,Ren Zongping,et al. Effects of freeze-thaw on soil erosion processes and sediment selectivity under simulated rainfall[J]. JOURNAL OF ARID LAND,2017,9(2):234-243.
APA	Wang Tian.,Li Peng.,Ren Zongping.,Xu Guoce.,Li Zhanbin.,...&Yao Jingwei.(2017).Effects of freeze-thaw on soil erosion processes and sediment selectivity under simulated rainfall.JOURNAL OF ARID LAND,9(2),234-243.
MLA	Wang Tian,et al."Effects of freeze-thaw on soil erosion processes and sediment selectivity under simulated rainfall".JOURNAL OF ARID LAND 9.2(2017):234-243.