Comparison of Velocity and Reynolds Stress Distributions in a Straight Rectangular Channel with Submerged and Emergent Vegetation

Vegetation in rivers and streams plays an important role preventing erosion improving bank stability. Comparison between emergent vegetation (bank vegetation) submerged vegetation, terms of velocity Reynolds stress distributions, for the same aspect ratio flow discharge, has received limited attention literature. This study investigates stress, as well log law a laboratory flume compares results different set up with sediment size but discharge. The indicate that influence on secondary currents generation is less than vegetation. In addition, application valid both cases, however, it to y/h = 0.75 (in which cover banks partly out water) 0.25 bank. For distribution presents convex form turning point. those artificial pool over low (<5) keeps almost distributions decreases point distribution. cover, location zero shear superposes maximum velocity, approaching shifting towards bed, approaches bed.