Turbulent Flow through Random Vegetation on a Rough Bed

River vegetation radically modifies the flow field and turbulence characteristics. To analyze effects on flow, most scientific studies are based laboratory tests or numerical simulations with stems smooth beds. Nevertheless, in this manner, of bed sediments neglected. The aim paper is to experimentally investigate a vegetated channel and, consideration that, comparative experiments velocity measures, performed an Acoustic Doppler Velocimeter (ADV) profiler, were carried out flume different uniform sediment sizes same pattern randomly arranged emergent rigid vegetation. better comprehend time-averaged conditions, was explored. Subsequently, analysis focused energetic characteristics determination Turbulent Kinetic Energy (TKE) its components, as well energy spectra components immediately downstream element. results show that both roughness surface deeply affect Furthermore, it revealed influence becomes predominant grain size larger.