Longitudinal Stripe of Sorting along Vegetation Zone in Open Channel

Abstract

In fluvial stream with vegetated zone, lateral bed-load transport is induced by low-frequency fluctuation of transverse velocity and a longitudinal sand ridge is formed along the boundary of vegetation zone. In case of graded material, it accompanies a longitudinal sorting, and a longitudinal stripe is characteristic where is covered by fine materials. Flume experiment is conducted to demonstrate the above sorting process, and it is explained by using the non-equilibrium bedload transport model for each grain size