Dunes act a bit like solid waves rolling over their bases.
Please draw a time sequence of wind driven dune positions and cross sections showing the time positions of layers within the dune. Discuss the chemistry of creep soil. Build a qualitative and simple quantitative model of the rate at which creep soil can move down a hill. You can give the simple model in terms of degree of slope, equivalent strain in the creep soil etc. 6. Probabilistic hazard analysis and river flooding - a simple example.