Experiment study on flow slowing characteristics under vegetation coverage
Flow slowing characteristics of vegetation are studied under 6 slopes,7 flow discharges and 5 vegetation coverages.Results show that influence of flow slowing coefficient decreases,and flow slowing effects are enhanced,when vegetation coverage is more than 4.650%,flow slowing effects tend to stable;it decreases with the increases of the flow,but increases while slope increases.The flow slowing coefficient decreases with the depth and the Reynolds number increasing,however,it negatively correlates with the Froude Number,with positively correlation relationships.Based on control variables of the experiment (vegetation coverage,flow discharge and slope),the equation of current slowing coefficient is set up.