| Authors developed a sediment discharge measurement system with ADCP. In terms of the sediment discharge measurement, the ADCP is powerful tools, since a bed-load velocity can be measured. At the same time, it has a disadvantage for estimating the velocity at vicinity of river bed, since ADCP has an unmesurable area around the river bed. In the mean time, authors realized that flow distribution around the river bed is indispensable for estimating the shear velocity, while other studies used entire velocity profile. Authors realized the importance and a contradiction, when we compared the estimated-shear velocity and the bed-load velocity. For solving the contradiction, the authors developed the algorism to 1) inter- and extrapolate velocity distribution, and 2) determined the shear velocity. For verified the authors’ algorism, we conducted the experiment with an experimental flume in movable bed condition. |
