Using what has become a celebrated catchphrase, Philip W. Anderson once wrote that
“more is different”(Science, Vol. 177, Issue 4047, pp. 393–396, 1972). First formulated in the …

The soft part of the Earth's surface–the ground beneath our feet–constitutes the basis for life
and natural resources, yet a general physical understanding of the ground is still lacking. In …

This study examines channel dynamics and bed load transport through a riffle and pool
sequence forced by downstream channel width variations within an experimental flume. The …

A potential control of downstream channel width variations on the structure and planform of
pool-riffle sequence local bed topography is a key to the dynamics of gravel-bed rivers. How …

River channels are maintained by coordination between flow hydraulics, sediment supply,
riparian vegetation, and sediment transport. This coordination is challenging to understand …

We describe the probabilistic physics of rarefied particle motions and deposition on rough
hillslope surfaces. The particle energy balance involves gravitational heating with …

We examine a theoretical formulation of the probabilistic physics of rarefied particle motions
and deposition on rough hillslope surfaces using measurements of particle travel distances …

SUMMARY IN AN ERA of rising seas and other challenges posed by climate change,
coastal regions like the Netherlands are facing ever graver threats. Strategic sand …

Granular sediment of various sizes moves downstream along river beds when water flow is
capable of entraining particles from the bed surface. This process is known as bed load …

Bedload transport is the movement of coarse grains through river channels by bouncing,
rolling, and sliding. Because coarse grains control river stability, predicting the rate of …