Abstract
The cavity zone along riverside is expected to produce native habitats of various ecosystems and water-friendly environment. However, effects of side cavities on flow resistance and turbulent flow structures are ambiguous. In this paper, Effects of aspect ratio of side cavity on open-channel flow with permeable and impermeable side cavities were examined experimentally. Velocity fluctuations were measured by using a particle-image-velocimetry (PIV). We revealed the flow resistance could be explained by the difference of mass exchange and momentum transport through the interaction between the side cavity and main flow region.
