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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Cited articles

Ahmerkamp, S., Winter, C., Janssen, F., Kuypers, M. M. M., and Holtappels, M.: The impact of bedform migration on benthic oxygen fluxes, J. Geophys. Res.-Biogeo., 120, 2229–2242, https://doi.org/10.1002/2015JG003106, 2015. 
Al-Dabbas, M. A. M. and McManus, J.: Shell fragments as indicators of bed sediment transport in the Tay Estuary, P. Roy. Soc. Edinburgh Sect. B, 92, 335–344, https://doi.org/10.1017/S0269727000004759, 1987. 
Baas, J. H. and De Koning, H.: Washed-out ripples; their equilibrium dimensions, migration rate, and relation to suspended-sediment concentration in very fine sand, J. Sediment Res., 65, 431–435, https://doi.org/10.1306/D42680E5-2B26-11D7-8648000102C1865D, 1995. 
Baas, J. H., van Dam, R. L., and Storms, J. E. A.: Duration of deposition from decelerating high-density turbidity currents, Sediment Geol., 136, 71–88, https://doi.org/10.1016/S0037-0738(00)00088-9, 2000. 
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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.