干旱区生态环境知识资源中心(Arid): Variation in soil detachment capacity of structural and sedimentary crusts induced by simulated rainfall formed on ridge and furrow

Arid

DOI	10.1016/j.catena.2021.105971
	Variation in soil detachment capacity of structural and sedimentary crusts induced by simulated rainfall formed on ridge and furrow
	Chen, Lin; Wang, Jian; Wang, Hao; Xu, Feifei; Song, Pengshuai; Yang, Chang; Li, Jiande
通讯作者	Wang, J
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	211
英文摘要	The response of erosion to soil physical crusts (i.e., structural and sedimentary crusts) has been extensively investigated. Yet few studies have quantified the effects of physical crusts on their detachment capacity (Dc). Accordingly, we investigated the variation in Dc of physical crusts as induced by simulated rainfall. The runoff plot (2.0 m long x 1.0 m wide x 0.5 m high) was set to a slope of 5 degrees and filled with Lou soil (Haplic Luvisol) using horizontal tillage with ridges (1.0 m long x 0.2 m wide x 0.1 m high) and cm furrows (1.0 m long x 0.3 m wide x 0.1 m deep). Simulated rainfall was applied at a single intensity (60 mm h(-1)) for seven durations (0, 5, 10, 15, 20, 25, and 30 min) to obtain structural (at ridges) and sedimentary (at furrows) crusts. Crust samples were collected to obtain Dc, by scouring them for 2 min at a constant inflow discharge (0.8 L min(-1)) on a hydraulic flume (15(degrees) slope). For both structural and sedimentary crusts, with increasing rainfall duration, the measured bulk density (BD), crust thickness (Ct), micro-aggregate content (MIA), and disintegration index (DI) increased, whereas the macro-aggregate content (MAA) decreased. Dc of 0 min and structural crust formed within 5 min of rainfall decreased with a longer scouring time. By contrast, Dc of the other crust types initially rose with an extended scouring time but then plateaued after similar to 60 s. Dc of sedimentary crusts were significantly lower than that of structural crusts. Notably, crusts formed by rainfall at 30 min had greatest detachment reduction benefit. Dc was inversely related to BD, Ct, MIA and DI, whereas increased with increasing MAA. This research provides a timely reference for the effect of physical crust on concentrated flow in arid and semi-arid areas.
英文关键词	Physical crusts Structural properties Concentrated flow Detachment capacity Laboratory flume
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790468400006
WOS关键词	LOESS PLATEAU ; AGGREGATE STABILITY ; HYDRAULIC RESISTANCE ; SIZE DISTRIBUTION ; OVERLAND-FLOW ; EROSION ; IMPACT ; LAND ; INFILTRATION ; RUNOFF
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392075
推荐引用方式 GB/T 7714	Chen, Lin,Wang, Jian,Wang, Hao,et al. Variation in soil detachment capacity of structural and sedimentary crusts induced by simulated rainfall formed on ridge and furrow[J],2022,211.
APA	Chen, Lin.,Wang, Jian.,Wang, Hao.,Xu, Feifei.,Song, Pengshuai.,...&Li, Jiande.(2022).Variation in soil detachment capacity of structural and sedimentary crusts induced by simulated rainfall formed on ridge and furrow.CATENA,211.
MLA	Chen, Lin,et al."Variation in soil detachment capacity of structural and sedimentary crusts induced by simulated rainfall formed on ridge and furrow".CATENA 211(2022).