A modified debris-flow super-elevation formula with the run-up effect

被引：0
作者：
Zhao, Jinheng [1 ,2 ,3 ]
Hu, Kaiheng [1 ,2 ]
Tang, Jinbo [1 ,2 ]
Li, Pu [1 ,2 ,3 ]
机构：
[1] Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu
[2] Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu
[3] University of Chinese Academy of Sciences, Beijing
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2015年 / 46卷 / 02期
关键词：
Debris flow; Run-up; Super-elevation; Velocity;
D O I：
10.13243/j.cnki.slxb.2015.02.008
中图分类号：
学科分类号：
摘要：
Debris flow exhibits a noticeable super-elevation when it passes through a meandering stream. Previous studies attributed the super-elevation completely to debris-flow centrifugal motion in bends of the stream and neglected the run-up effect on it. Assuming the super-elevation and run-up caused respectively by tangent and normal velocity components of debris flows along the bends, a new formula for calculating the super-elevation is derived from the combination of the traditional forced vortex equation and the velocity head equation by virtue of geometric similar relationship between triangles of velocity vector and the curved channel. The total super-elevation is a function of flow velocity, ratio of internal and external curvature radiuses, and bank inclination angle. The new formula is applicable to the wide curved channel of which turning angle is less than 60°. The relative error between the calculated and field or experimental measured values is less than 17 %, which is acceptable for practical purpose. ©, 2015, China Water Power Press. All right reserved.
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页码：190 / 196
页数：6
相关论文
共 6 条
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