Effect of Vertical Variation of Submerged Vegetation Density on the Flow Resistance

Aquatic vegetation plays a critical role in aquatic environments and provides various valuable services. To characterize vegetation, density flexibility are usually used as parameters, but found nature may have non-uniform distribution of the vertical direction. Studies shown that this non-uniformity could impact flow structure resistance. With aim studying effect variation submerged on resistance bulk characteristics, hydrodynamics three types wooden model elements were compared laboratory. Vegetation models had same different distributions density. All other influential parameters kept constant so any differences would be attributable to The results show impacts field, bed shear stress, There was 41% difference value drag coefficient produced by models. distance between geometrical center introduced parameter quantify vegetation. is direct relation with both Manning’s coefficients. findings can study help researchers practitioners use relevant parameters.