The objectives of this study are carried out a series of controlled large wave flume experiments using fine-grained sediment from the Huanghe River Delta, exploring the complete sequence of sediment behavior in the bottom boundary layer (BBL) during wave-induced liquefaction. The results show that: (1) The BBL in silty seabed is exposed to a progressive wave, goes through a number of different stages including compaction before liquefaction, sediment liquefaction, and compaction after liquefaction, which determines the range and thickness of BBL. (2) With the introduction of waves, first, the sediment surface has settled by an amount S (S=1–2 cm) in the course of wave loadings with an insufficient accumulation of pore water pressure. And a thin high concentration layer formed the near-bed bottom. (3) Once the liquefaction sets in, the liquefied sediment with an ‘orbital motion’ and the sub-liquefied sediment form a two-layer-sediment region. The range of BBL extends downwards and stopped at a certain depth, subsequently, develops upwards with the compaction process. Meanwhile, re-suspended sediments diffuse to the upper water column. (4) During the dynamics process of the BBL beneath progressive waves, the re-suspended sediment increment ranked as sediment liquefaction > erosion before liquefaction > compaction after liquefaction.

中文翻译：

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粉质海床底部边界层动力学的波浪水槽试验

这项研究的目的是使用来自黄河三角洲的细颗粒沉积物进行一系列受控的大波浪水槽实验，探索波浪诱导液化过程中底部边界层（BBL）沉积物行为的完整序列。结果表明：（1）粉质海底BBL暴露于渐进波中，经历了液化前压实，沉积物液化和液化后压实的多个不同阶段，决定了BBL的范围和厚度。（2）随着波的引入，首先，沉积物表面沉降了S量（S = 1–2 cm）在波浪荷载过程中，孔隙水压力积累不足。薄的高浓度层形成了近床底。（3）液化开始后，“轨道运动”的液化沉积物与次液化的沉积物形成两层沉积区。BBL的范围向下扩展并停在一定深度，随后随着压​​实过程向上扩展。同时，重新悬浮的沉积物扩散到上水柱。（4）在BBL渐进波作用下的动力学过程中，重悬的泥沙增量依次为泥沙液化>液化前的侵蚀>液化后的压实。