Effect of Microtopography, Slope Length and Gradient, and Vegetative Cover on Overland Flow Through Simulation

doi:10.1061/(ASCE)1084-0699(2004)9:5(375)

IMECH-IR > 力学所知识产出(1956-2008)

	Effect of Microtopography, Slope Length and Gradient, and Vegetative Cover on Overland Flow Through Simulation
	Liu QQ(刘青泉); Singh VP; Liu, QQ (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
发表期刊	Journal of Hydrologic Engineering
	2004
卷号	9 期号:5 页码:375-382
ISSN	1084-0699
摘要	Overland flow on a hillslope is significantly influenced by its microtopography, slope length and gradient, and vegetative cover. A 1D kinematic wave model in conjunction with a revised form of the Green-Ampt infiltration equation was employed to evaluate the effect of these surface conditions. The effect of these conditions was treated through the resistance parameter in the kinematic wave model. The resistance in this paper was considered to be made up of grain resistance, form resistance, and wave resistance. It was found that irregular slopes with microtopography eroded more easily than did regular slopes. The effect of the slope gradient on flow velocity and flow shear stress could be negative or positive. With increasing slope gradient, the flow velocity and shear stress first increased to a peak value, then decreased again, suggesting that there exists a critical slope gradient for flow velocity and shear stress. The vegetative cover was found to protect soil from erosion primarily by enhancing erosion-resisting capacity rather than by decreasing the eroding capability of overland flow.
学科领域	力学
DOI	10.1061/(ASCE)1084-0699(2004)9:5(375)
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000223363900005
关键词[WOS]	INFILTRATING SURFACES ; VENANT EQUATIONS ; RUNOFF ; HYDROGRAPH ; EROSION
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Civil ; Environmental Sciences ; Water Resources
引用统计	被引频次：101[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16223
专题	力学所知识产出(1956-2008)
通讯作者	Liu, QQ (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Liu QQ,Singh VP,Liu, QQ . Effect of Microtopography, Slope Length and Gradient, and Vegetative Cover on Overland Flow Through Simulation[J]. Journal of Hydrologic Engineering,2004,9,5,:375-382.
APA	刘青泉,Singh VP,&Liu, QQ .(2004).Effect of Microtopography, Slope Length and Gradient, and Vegetative Cover on Overland Flow Through Simulation.Journal of Hydrologic Engineering,9(5),375-382.
MLA	刘青泉,et al."Effect of Microtopography, Slope Length and Gradient, and Vegetative Cover on Overland Flow Through Simulation".Journal of Hydrologic Engineering 9.5(2004):375-382.

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