EXPERIMENTAL STUDY ON THE CALCULATION METHOD OF THE BED LOAD DISCHARGE USING THE BOTTOM TRACK VELOCITY MEASURED BY ADCP

Abstract

 The authors proposed a calculation method of the bed load discharge using the bottom track velocity measured by ADCP and this study verified the effectiveness of the method by conducting an experiment with movable bed. First, we confirmed that the bottom track velocity measured by ADCP represents the sand velocity on the riverbed by using the STIV method. Next, a measurement method of the time variation of the sediment volume accumulated at the downstream end by SfM method using the interval photographed images of five digital cameras within 5% of accuracy was developed. As a result of the experiment based on these findings, the effectiveness was clarified since the time change of the bed load discharge estimated by the authors method and the measured value by SfM method roughly agreed.