A theoretical framework, based on the phenomenological theory of turbulence applied to scour-related processes due to plunging jets on cohesionless beds, is considered in this paper. More specifically, its predictive capability is assessed herein for large-scale domains, after it was developed for small scales elsewhere. The analysis focuses on both the time-evolution process and the equilibrium configuration for a wide range of hydraulic structures. After revisiting the theory for the temporal evolution of the scour processes, the scour for large-scale tests is investigated using unpublished experiments performed at Colorado State University by the last author. These tests confirm the existence of two stages in the scour hole development, namely the developing and developed phases. Thus, the scour dynamics at large scales is shown to be consistent with that at smaller scales. Then, the theory recently introduced by the first three authors is used to predict the time evolution of scour, corroborating that the very same equations, together with the same coefficients, provide successful predictions, regardless of scale and granulometric distribution. Finally, the theory is again verified against laboratory data on PK weirs obtained at the University of Pisa. Overall, the work described in the paper offers a tool with general validity.

本文考虑了一个理论框架，该理论框架基于湍流现象学理论，该理论适用于无凝聚力床层上的喷射射流引起的冲刷相关过程。更具体地说，在其他地方为小规模开发了它之后，它的预测能力在本文中针对大规模领域进行了评估。分析侧重于各种水工结构的时间演变过程和平衡配置。在重新审视冲刷过程的时间演变理论后，使用最后一位作者在科罗拉多州立大学进行的未发表的实验研究了大规模测试的冲刷。这些测试证实冲刷孔发展存在两个阶段，即发展阶段和发展阶段。因此，大尺度的冲刷动力学与小尺度的冲刷动力学一致。然后，前三位作者最近引入的理论用于预测冲刷的时间演变，证实了完全相同的方程以及相同的系数，无论规模和粒度分布如何，都能提供成功的预测。最后，该理论再次根据在比萨大学获得的 PK 堰的实验室数据得到验证。总的来说，论文中描述的工作提供了一种具有普遍有效性的工具。无论规模和粒度分布如何。最后，该理论再次根据在比萨大学获得的 PK 堰的实验室数据得到验证。总的来说，论文中描述的工作提供了一种具有普遍有效性的工具。无论规模和粒度分布如何。最后，该理论再次根据在比萨大学获得的 PK 堰的实验室数据得到验证。总的来说，论文中描述的工作提供了一种具有普遍有效性的工具。