Although the effects of
shape and roughness on particle settling velocity are broadly understood,
settling velocities of biogenic particles that have the quality of grain-size dependent
roughness are less well constrained. This work by Joshi et al. addresses
that gap in knowledge by examining the properties of maërls. The results
indicate that maërl is suspended at lower current speeds than equant sediment,
and how unsorted siliciclastic and maërl sediment can be advected differentially
to deposit unsorted maërl gravel and fine sand. These results reveal how the
hydrodynamic behavior of maërl may explain its propensity to form spatially
well-defined "beds" or beaches with very low amounts of sand.
Settling velocity and grain shape of maërl biogenic gravel by Siddhi Joshi, Garret P. Duffy,
and Colin Brown
No comments:
Post a Comment