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首页> 外文期刊>Nordic hydrology >Scour at a side-weir intersection located on an alluvial river
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Scour at a side-weir intersection located on an alluvial river

机译：在冲积河旁的十字路口冲刷

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摘要

An experimental investigation of the equilibrium depth of local scour around side-weirs located on an alluvial river is presented in this paper. A sand bar in the middle of the channel and a scour hole close to the weir side is formed because of changes in shear stress field and velocity at the downstream end of the side weir. The depth of clear-water scour increases by time and approaches the equilibrium state asymptotically depending on approach flow velocity. The equilibrium depth of scour increases by the increase of the dimensionless parameters of approach flow velocity, water head ratio, side-weir length and sediment size. Although there is no scour for the dimensionless approach flow velocity less than 0.45, it increases almost linearly with the dimensionless approach flow velocity and the maximum value of scour depth occurs when it is equal to 1.0.
机译：本文对冲积河旁堰的局部冲刷平衡深度进行了实验研究。由于剪切应力场和侧堰下游端速度的变化，在通道中间形成了一条砂棒，并在堰侧形成了冲刷孔。清水冲刷的深度随时间增加，并根据进水流速渐近地达到平衡状态。平衡冲刷深度随着进水流速，水头比，侧围长度和沉积物尺寸的无量纲参数的增加而增加。尽管无量纲进场流速小于0.45时没有冲刷，但它几乎随无量纲进近流速呈线性增加，并且当冲蚀深度等于1.0时，冲刷深度出现最大值。

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