干旱区生态环境知识资源中心(Arid): Research on soil detachment rate and hydrodynamic parameters of dip/anti-dip slope in simulated karst trough valley

Arid

DOI	10.1007/s12665-019-8617-1
	Research on soil detachment rate and hydrodynamic parameters of dip/anti-dip slope in simulated karst trough valley
	Gan, Fengling; He, Binghui; Qin, Ziyang
通讯作者	He, Binghui
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2019
卷号	78 期号:21
英文摘要	Bedding dip has an important influence on soil detachment and flow hydrodynamics in a karst trough valley. The laboratory rainfall simulation was conducted with three bedding dips (bare slope, dip slope and anti-dip slope) under three rainfall intensities (30, 60, 90 mm h(-1)). The characteristics of soil detachment and hydrodynamic parameters were assessed, including water flow shear stress, stream power, unit stream power and unit flow energy. The significant effects of bedding dips and rainfall intensities and their interactions on soil detachment and hydrodynamic parameters were examined. The results showed that (1) the soil detachment rate decreased with increasing rainfall duration, and the soil detachment rate in 30 degrees bedding dip of dip slope was much larger than those in bare slope and anti-dip slope in most rainfall intensities; (2) the 60 degrees bedding dip of dip slope was the threshold that controlled the stream power, unit stream power and unit flow energy increased or decreased under different rainfall intensities; and (3) the soil detachment rate had extremely significant positive power relationships with water flow shear stress, stream power, unit stream power and unit flow energy. Meanwhile, the stream power was the most suitable parameter for predicting soil detachment in a karst trough valley slope. Therefore, these results could provide useful information for soil erosion prediction in a karst trough valley.
英文关键词	Hydrodynamic parameters Bedding dip Karst trough valley Soil detachment rate Dip anti-dip slopes
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000491146200001
WOS关键词	SEDIMENT TRANSPORT CAPACITY ; CONCENTRATED FLOW EROSION ; UNIT STREAM POWER ; OVERLAND-FLOW ; ROCKY DESERTIFICATION ; HYDRAULIC PARAMETERS ; MECHANISM ; VELOCITY ; QUALITY ; RUNOFF
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310571
作者单位	Southwest Univ, Coll Resources & Environm, Key Lab Ecoenvironm Three Gorges Reg, Minist Educ, Chongqing 400715, Peoples R China
推荐引用方式 GB/T 7714	Gan, Fengling,He, Binghui,Qin, Ziyang. Research on soil detachment rate and hydrodynamic parameters of dip/anti-dip slope in simulated karst trough valley[J],2019,78(21).
APA	Gan, Fengling,He, Binghui,&Qin, Ziyang.(2019).Research on soil detachment rate and hydrodynamic parameters of dip/anti-dip slope in simulated karst trough valley.ENVIRONMENTAL EARTH SCIENCES,78(21).
MLA	Gan, Fengling,et al."Research on soil detachment rate and hydrodynamic parameters of dip/anti-dip slope in simulated karst trough valley".ENVIRONMENTAL EARTH SCIENCES 78.21(2019).