This paper presented the results of wave flume experiments for the process of a silty sediment bed responded to wave action. Silty sediment was sampled from modern Yellow River Delta. In coastal areas, seabed liquefaction and sediment re-suspension were the most significant hydrodymic processes the seabed sediment presented under wave action. However, few studies have focused on the interl response of sediment under wave action with regard to its role in liquefaction and sediment re-suspension. In this study, four wave height scerios (5 cm, 7 cm, 10 cm and 18 cm) were tested. Results indicated that the movements of the suspended sediments were domited by the re-suspension of surface sediment erosion at the initial stage of wave action, whereas the suspended sediments were transported from the interl seabed sediment upward due to wave-induced liquefaction and seepage at a later stage. The observations confirmed that waves enhanced sediment re-suspension by liquefying the soil bed through excess pore pressure accumulations, not simply by excess shear stress.
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