Discuss the relative merits of the fall velocity versus the grainsize as a descriptor of sediment behavior in the nearshore zone. For a sand sample with a meangrainsize µφ = 1 and standard deviation...

Discuss the relative merits of the fall velocity versus the grainsize as a descriptor of sediment behavior in the nearshore zone.

For a sand sample with a meangrainsize µφ = 1 and standard deviation of 0.5, what are the probabilities of grainsizes coarser than0.5 φ units, 1φ units, and 1.5φ units? What is the significance of these sizes?