Sand dunes migrate—so why haven’t some budged in 60 years?
sand
Posted inResearch Spotlights
Wave Ripples Spaced by Flow Downstream of Ripple Peaks
The well-known ratio between sand ripple spacing and wave-driven flow oscillations may be dictated by flow dynamics downstream of ripple crests.
Posted inResearch Spotlights
Exploring How Water Flow Affects Bed Forms in Different Environments
In a flat sand bed, water creates undulating features.
Posted inResearch Spotlights
Modeling Sand Grains in Water
Scientist creates a numerical model that explores sediment transport.
Posted inResearch Spotlights
Where Does the Bed of a River Change from Gravel to Sand?
Analysis of the Fraser River suggests that riverbed sediments shift abruptly depending on river slope changes and water speed.