Experimental study of non-buoyant microplastic transport beneath breaking irregular waves on a live sediment bed

Date

2022-08-01

Author

Güler, Hasan Gökhan
Larsen, Bjarke Eltard
Quintana, Oriol
Goral, Koray Deniz
Carstensen, Stefan
Christensen, Erik Damgaard
Kerpen, Nils B.
Schlurmann, Torsten
Fuhrman, David R.

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This paper presents experimental results on the cross-shore distribution of non-buoyant microplastic particles under irregular waves propagating, shoaling and breaking on live sediment sloping beds. Eighteen microplastic particle groups having various shapes, densities, and sizes are tested. The experiments consider two initial bottom configurations corresponding to a (i) plane bed and (ii) pre-developed singly-barred profile (more representative of field conditions). Four different microplastic accumulation hotspots are identified: offshore of the breaker bar, at the breaker bar, the plateau region between the breaker bar and beach, and the beach. It is found that the accumulation patterns primarily fall within three different particle Dean number regimes. The importance of plunger-type breaking waves for both on and offshore transport of microplastic particles is highlighted.

Subject Keywords

Cross-shore, Irregular waves, Live bed, Microplastic particles, Non-buoyant

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85133842346&origin=inward
https://hdl.handle.net/11511/109330

Collections

Department of Civil Engineering, Article