Abstract
Tall and flexible plants such as common reeds are deformed by drag force of flood flow. This deformation, linked to flow resistance, affects flow velocity and depth. Drawing on this physical link, a model is developed to describe the deformation of plants and vertical profile of mean velocity and Reynolds stress of flow above and through flexible vegetation communities. The model is supported by real scale flume experiment using a common reed community. In addition, this work extends an estimation method of Manning's roughness coefficient for practical use by including the measured values that represent shape and strength characteristics of flexible plants.
