Physically and numerically modelling turbulent flow in a patchy vegetated open channel

摘要: This thesis present results relating to a series of laboratory experiments investigating the velocity field in order provide an understanding into flow structures by describing mechanisms and transport features heterogeneous (patchy) flexible rigid strip vegetation interaction with gravel roughness which could be used understand sediment future. The experimental were examined context shear layer arising as result patchy distribution roughness. It is shown that relative bed, vegetated section channel generally resembles free layer. resistance within porous reduces creates transition high across interface at top vegetation; primary importance boundary regions are influence dominate overall momentum transport. These have been calibrate numerical model for depth-averaged streamwise stress using Shiono Knight Method (SKM). demonstrated approximately 90% accuracy comparison data.