Hydrodynamic flow structures at an obstructed-unobstructed interface in a partially vegetated channel

In this manuscript we focus on the study of flow structures in a channel partially obstructed by an array of equispaced, vertical, rigid, emergent, circular steel cylinders. Emergent vegetation strongly affects the flow hydrodynamic structures, forming a transversal abrupt velocitytransition region at the interface between the obstructed and the unobstructed domains. A modified log-law predicting the representative transversal profile of the mean flow velocity at the obstructedunobstructed interface is proposed and validated.