| Bedload discharge measurement has been considered very important but very difficult, since observed results could not be justified as appropriated value, especially during large-scale flooding. As a matter of fact, field engineers experienced two different bedload discharges by three or four orders of magnitude with similar hydraulic conditions. To obtain appropriate representive values, authors have focused attention on 1) bedload velocity, which can be obtained by Acoustic Doppler Current Profiler (ADCP), 2) local shear velocity, which can be estimated by ADCP as well, and 3) thickness of bedload layer. With those three elements, authors compiled a bedload discharge measurement method, which can be used in actual rivers during flooding. For verifying the method, authors conducted an experimental study. |
