干旱区生态环境知识资源中心(Arid): Hydrological response and soil detachment rate from dip/anti-dip slopes as a function of rock strata dip in karst valley revealed by rainfall simulations

Arid

DOI	10.1016/j.jhydrol.2019.124416
	Hydrological response and soil detachment rate from dip/anti-dip slopes as a function of rock strata dip in karst valley revealed by rainfall simulations
	Gan, Fengling; He, Binghui; Qin, Ziyang
通讯作者	He, Binghui
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	581
英文摘要	Rock dip angle plays a significant role in surface hydraulic characteristics and leads to different spatial distribution of water and soil loss in Karst Trough Valleys. In this study, the rock dip angle effect on the hydraulic characteristics and soil detachment rate on dip/anti-dip slopes was explored via rainfall simulations and a steel experimental flume. The rainfall intensities ranged from 30 to 90 mm.h(-1), and the rock dip angles varied from 10 degrees to 60 degrees. The results revealed that i) surface runoff on the dip slope was higher than that on the anti-dip slope, whereas underground runoff presented opposite results. The 30 degrees rock dip angle presented the critical flow velocity for the anti-dip slope, and the flow velocity reduced as the rock dip angle of the dip slope increased. ii) Laminar water flow occurred on the dip/anti-dip slope (Re was < 500 in all cases). For the anti-dip slope, the Re value reduced by 3.53-89.79%, the Fr value reduced by 34.13-73.04%, and the f value increased by 61.07-93.78% compared with that of the dip slope. iii) A linear function model can describe the relationship between the soil detachment rate and hydrodynamic parameters (tau, w and E). It was found that w was the best of the hydrodynamic parameters to describe the soil detachment rate. These results could provide valuable information for establishing a national-scale empirical soil erosion model for Karst Trough Valley.
英文关键词	Karst Trough Valley Dip/anti-dip slopes Rock strata dip Hydraulic characteristics Rainfall simulation
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000514758300031
WOS关键词	MODELING WATER EROSION ; FLOW HYDRAULICS ; OVERLAND-FLOW ; PHYSICAL PRINCIPLES ; RILL HYDRAULICS ; SEDIMENT YIELD ; DESERTIFICATION ; VELOCITY ; RUNOFF ; GEOMORPHOLOGY
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314986
作者单位	Southwest Univ, Minist Educ, Key Lab Ecoenvironm Three Gorges Reg, Coll Resources & Environm, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Gan, Fengling,He, Binghui,Qin, Ziyang. Hydrological response and soil detachment rate from dip/anti-dip slopes as a function of rock strata dip in karst valley revealed by rainfall simulations[J],2020,581.
APA	Gan, Fengling,He, Binghui,&Qin, Ziyang.(2020).Hydrological response and soil detachment rate from dip/anti-dip slopes as a function of rock strata dip in karst valley revealed by rainfall simulations.JOURNAL OF HYDROLOGY,581.
MLA	Gan, Fengling,et al."Hydrological response and soil detachment rate from dip/anti-dip slopes as a function of rock strata dip in karst valley revealed by rainfall simulations".JOURNAL OF HYDROLOGY 581(2020).