Effects of different spatial distributions of physical soil crusts on runoff and erosion on the Loess Plateau in China

doi:10.1002/esp.4175

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所科研产出--SCI > 2017--SCI

	Effects of different spatial distributions of physical soil crusts on runoff and erosion on the Loess Plateau in China
	Lu, Pei 1; Xie, Xinli 1; Wang, Linhua 1; Wu, Faqi 2; Wu, FQ (reprint author), Northwest A&F Univ, Coll Resources & Environm, Yangling, Shaanxi, Peoples R China.
刊名	EARTH SURFACE PROCESSES AND LANDFORMS
	2017
卷号	42 期号:13 页码:2082-2089
关键词	Depositional Crust Structural Crust Spatial Distribution Runoff Rate Sediment Yield
ISSN号	0197-9337
DOI	10.1002/esp.4175
文献子类	Article
英文摘要	The response of runoff and erosion to soil crusts has been extensively investigated in recent decades. However, there have been few attempts to look at the effects of spatial configuration of different soil crusts on erosion processes. Here we investigated the effects of different spatial distributions of physical soil crusts on runoff and erosion in the semi-arid Loess Plateau region. Soil boxes (1.5m long x 0.2m wide) were set to a slope of 17.6% (10 degrees) and simulated rainfall of 120mm h(-1) (60minutes). The runoff generation and erosion rates were determined for three crust area ratios (depositional crust for 20%, 33%, and 50% of the total slope) and five spatial distribution patterns (depositional crust on the lower, lower-middle, middle, mid-upper, and upper slope) of soil crusts. The reduction in sediment loss (sediment reduction') was calculated to evaluate the effects of different spatial distributions of soil crusts on erosion. Sediment yield was influenced by the area ratio and spatial position of different soil crusts. The runoff rate reached a steady state after an initial trend of unsteadily increasing with increasing rainfall duration. Sediment yield was controlled by detachment limitation and then transport limitation under rainfall. The shifting time of erosion from a transport to detachment-limiting regime decreased with increasing area of depositional crust. No significant differences were observed in the total runoff among treatments, while the total sediment yield varied under different spatial distributions. At the same area ratio, total sediment yield was the largest when the depositional crust was on the upper slope, and it was smallest when the crust was deposited on the lower slope. The sediment reduction of structural crust (42.5-66.5%) was greater than that of depositional crust (16.7-34.3%). These results provide a mechanistic understanding of how different spatial distributions of soil crusts affect runoff and sediment production. Copyright (c) 2017 John Wiley & Sons, Ltd.
学科主题	Physical Geography ; Geology
URL标识	查看原文
出版地	HOBOKEN
语种	英语
出版者	WILEY
WOS记录号	WOS:000412580300013
资助机构	National Natural Science Foundation of China [41271288] ; National Natural Science Foundation of China [41271288] ; National Natural Science Foundation of China [41271288] ; National Natural Science Foundation of China [41271288]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7907]
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Wu, FQ (reprint author), Northwest A&F Univ, Coll Resources & Environm, Yangling, Shaanxi, Peoples R China.
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 2.Northwest A&F Univ, Coll Resources & Environm, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Lu, Pei,Xie, Xinli,Wang, Linhua,et al. Effects of different spatial distributions of physical soil crusts on runoff and erosion on the Loess Plateau in China[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2017,42(13):2082-2089.
APA	Lu, Pei,Xie, Xinli,Wang, Linhua,Wu, Faqi,&Wu, FQ .(2017).Effects of different spatial distributions of physical soil crusts on runoff and erosion on the Loess Plateau in China.EARTH SURFACE PROCESSES AND LANDFORMS,42(13),2082-2089.
MLA	Lu, Pei,et al."Effects of different spatial distributions of physical soil crusts on runoff and erosion on the Loess Plateau in China".EARTH SURFACE PROCESSES AND LANDFORMS 42.13(2017):2082-2089.