Wave Erosion of Cohesive and non-Cohesive Embankments: Laboratory Experiments

Wave Erosion of Cohesive and non-Cohesive Embankments: Laboratory Experiments

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Laboratory experiments were carried out in a wave tank to investigate wave induced beach profile evolution steely dan gaucho t-shirt and scarp recession on cohesive and non-cohesive model embankments.The cohesive embankment was constructed using a natural soil mixture, and the noncohesive embankment was constructed using cylindrical shaped polyethylene terephthalate (PET) pellets of uniform size.A standardized packing procedure was used for both cohesive and non-cohesive embankments.The onshore face slope of the embankment was approximately 30 degrees.

The morphological evolution of the embankment was monitored using water level sensors and a time-lapse camera.Waves quickly eroded the bank face near the free surface and formed a scarp.While an equilibrium profile was established relatively quickly and at a much steeper slope for the non-cohesive embankment, the cohesive embankment continued to erode for a much longer period.The scarp of the cohesive embankment retreated by a series of wave undercutting and slump failures.

An empirical relationship between incident wave height and embankment s&d rex tool erosion was established for the tested conditions.The measured beach profiles were compared with the developed analytical solution.