Effect Of Vegetation Density On The Hydrodynamic Of Submerged Vegetated Flow

Abstract

Vegetation density affects the hydrodynamic of flow field, increasing the hydraulic roughness scale; accelerate the conversion of mean kinetic energy into turbulent kinetic energy at the scale of the plant stems and branches. This study presents the laboratory experiment on the effect of increase in vegetation density using PIV techniques. The vegetation densities was varied while the channel bed-slope and submergence depth were kept constant. The results showed a remarkable reduction in flow rate, resulting in high turbulent shear stresses at the top of vegetation layer. It is evident that vegetation density is a significant vegetation parameter on the induction of hydraulic roughness.