Winnowing: Sub-surface entrainment of particles

This research focusses on the behaviour of fine particles which pass through the armour layer of bed material of the upper and middle reaches of a river. When the fine particles are entrained in the armour layer, it is described as ‘winnowing’ or vertical entrainment. A river bed generally consists of a coarse surface layer, which is the...

Relatie tussen ontgrondingen en steenstabiliteit van de toplaag

Experimental research on erosion behind stone bed protections. A relation is looked for between the stability parameter of the bed material and the erosion parameter alpha. Roughness and turbulence have been investigated.