Knowledge Management System of Institue of Mechanics, CAS
| 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.
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| Source Publication | Journal of Hydrologic Engineering
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| 2004 | |
| Volume | 9Issue:5Pages:375-382 |
| ISSN | 1084-0699 |
| Abstract | 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. |
| Subject Area | 力学 |
| DOI | 10.1061/(ASCE)1084-0699(2004)9:5(375) |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000223363900005 |
| WOS Keyword | INFILTRATING SURFACES ; VENANT EQUATIONS ; RUNOFF ; HYDROGRAPH ; EROSION |
| WOS Research Area | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| WOS Subject | Engineering, Civil ; Environmental Sciences ; Water Resources |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/16223 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Liu, QQ (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China. |
| Recommended Citation 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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