Hydrodynamics affected by submerged vegetation with different flexibility under unidirectional flow

Submerged vegetation changes the hydrodynamic characteristics of rivers, lakes, wetlands, and coastal zones. However, only a few studies have focused on effect flexible submerged under unidirectional flow. Therefore, laboratory experiments were conducted to study effects with different flexibility flow structure turbulence The results showed that reconfiguration coordination wave motion redistribute velocity, Reynolds stress, turbulent kinetic energy inside outside canopy. With gradual decrease in deflection height vegetation, differences dimensionless mixed layer thickness, bulk drag coefficient, averaged energy, contribution rate its shear production term for canopy also decrease; trend penetration depth stress is opposite. Based budget equation, model (TKE model) was established, which can be used predict within Here, scaling factor determined by Cauchy number. TKE applied conditions flexibilities high accuracy. It simple method vegetation-induced sediment material transport influence flexibility.