Author(s): L. Mao; J. R. Cooper; L. E. Frostick
Linked Author(s): Lynne Frostick
Keywords: No Keywords
Abstract: A series of laboratory flume experiments under conditions of both sediment starvation (zero sediment feeding) and recirculation were conducted in order to identify the properties and the temporal evolution of static and mobile armour layers. The results confirm that a static is coarser than a mobile armour layer created during the recirculation of the transported sediments, and that the mobile armour layer is rather insensitive to changes in the imposed flow strength. A preliminary analysis of laser scan bed surveys revealed the highly structured and imbricated nature of the static armour layer. The mobile armour layers created by rising discharges exhibited a greater roughness length and a poorer degree of organization, despite the fact that the surface material maintained an approximately constant grain size during recirculation.
Year: 2009