The presence of floaters should be taken into account when dealing with hydraulic analyses, e.g. when boats are moored along the river banks or large wood is expected to be conveyed by the river flow during floods. Many approaches have been proposed so far in order to consider the effects of floaters upon the flow features. Usually, they rely on the numerical resolution of the governing equation for both the fluid and the solid phases. Hence, their computational cost can be inadequate at the early stage of hydraulic studies or when large scale analyses have to be performed. A simplified method to compute the value of the resistance coefficient able to reproduce the effects of floaters upon the flow levels is proposed herein. The method is intended to provide the hydraulic parameters to be used within standard hydraulic simulations for which the effects of floaters must be accounted for; this is obtained by means of a modified resistance coefficient.

中文翻译：

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漂浮物对河水自由表面剖面的影响

在进行水力分析时，应考虑到浮子的存在，例如，当船只沿着河岸停泊时，或者在洪水期间河水将运送大量木材时。迄今为止，已经提出了许多方法来考虑浮子对流动特征的影响。通常，它们对流体和固相都依赖控制方程的数值分辨率。因此，在水力研究的初期或必须进行大规模分析时，它们的计算成本可能不足。本文提出了一种简化的方法，用于计算能够再现浮子对流量水平的影响的阻力系数的值。该方法旨在提供在标准水力模拟中使用的水力参数，为此必须考虑浮子的影响。这是通过修改后的电阻系数获得的。