Autor: Dubravka POKRAJAC
This paper presents a macroscopic description of turbulent open channel flow above and within a rough permeable bed. The flow domain consists of two regions: the stream region above the bed, which contains only water, and a porous medium region within the bed, which contains both water and grains. The two regions are separated by a macroscopic boundary. The macroscopic description contains the double-averaged Navier- Stokes equations valid within the stream and within the porous medium, as well as the conditions for macroscopic flow variables at the interface between the two regions.