Investigation of the impacts of coherent flow structures upon turbulence properties in regions of fluvial scour

摘要

Erosive action of water in streams by excavating and transporting the bed materials along downstream caused by the swirling of water and the reverse current, when water flows past an obstacle. River process is known as "fluvial" (e.g. fluvial erosion/scour and deposition patterns are related to running water, etc.). The importance of the inherent resistance of bed materials to the erosional process, or erodibility, is generally recognized in obstacle-shape and fluvial geomorphology, but the full implications of the dynamics of sand properties' that affect erodibility are seldom considered. The rate of scour is a key problem for understanding of scour process. More than 38 experiments with clear water flows were conducted to investigate the fluvial scouring process around obstacles.