We use the simplicity of the model to derive dynamical equations, linking collective entrainment to a nonlinear source term driving intermittency. Further modifications to the model (appearing in future paper) expand the possible phenomena which can be reproduced by the model. (5/5)

Entrainment by moving grains results in small patches of grain activity, reproducing “reptation” or “collective entrainment”: intermittency! Our model reproduces the intermittent statistics of grain activity observed in experiments. (4/5)

Any grains that are entrained are taken from the bed, and vice versa, creating a coupling between the dynamics of grain entrainment and bed height. If you drop grains at the head of a 'numerical flume' with a flat initial bed, the bed builds until steady state is reached. (3/5)

Work with Eric Deal, @venditti.bsky.social, and J. Taylor Perron. Inspired by reptation and collective entrainment, we present an intermediate-complexity model of bed load transport where moving grains entrain neighboring grains with a bed-slope-dependent probability. (2/5)

I’m excited to share a project that I’ve been working on since 2017! It started as a fun discussion with Eric Deal at AGU, but has turned into something more insightful than we had originally imagined. A lattice model of bed load sediment transport: doi.org/pnn5 (1/5)