Abstract
The deformation of plants under the flow with velocity distribution and the flow over vegetation layer with heterogeneous permeability constituted by deformed plants are analyzed, and they are coupled to evaluate the resistance of flow over flexible vegetation-covered bed. The property of plant representative to such an analysis is the flexural rigidity. The analytical results are compared with the flume data. Furthermore, the flexural rigidity of real plants in rivers are measured to evaluate the hydraulic resistance of grass in flood plain of rivers.
