Articles | Volume 9, issue 5
Earth Surf. Dynam., 9, 1335–1346, 2021
https://doi.org/10.5194/esurf-9-1335-2021
Earth Surf. Dynam., 9, 1335–1346, 2021
https://doi.org/10.5194/esurf-9-1335-2021

Research article 07 Oct 2021

Research article | 07 Oct 2021

Sediment shell-content diminishes current-driven sand ripple development and migration

Chiu H. Cheng et al.

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Short summary
Shells are biogenic particles that are widespread throughout natural sandy environments and can affect the bed roughness and seabed erodibility. As studies are presently lacking, we experimentally measured ripple formation and migration using natural sand with increasing volumes of shell material under unidirectional flow in a racetrack flume. We show that shells expedite the onset of sediment transport, reduce ripple dimensions and slow their migration rate.