A new method for measuring and calculating flows and bed forms around river banks

Abstract

Three-dimensional velocity distributions and bed-forms were measured around flow attacking zones in the experimental meandering channel in the Jyoganji River by using the Acoustic Doppler Current Profiler (ADCP). This paper presented a measuring method for accurate velocity and bed profiles using individual beam data for current profiles. We proposed a numerical analysis method for the local three-dimensional flow configuration around the revetment using bottom velocity computation method without the shallow water assumption. We validated the accuracy of new analytical method through the comparison with velocity distributions measured by the experiment. Results demonstrated that combined use of the measuring and calculating method presented here was useful to understand three-dimensional flows around structures.