Hydrophone is widely used for evaluate the sediment movement of a river. On the Nunomegawa River, observation of a hydrophone is continued and several times of big sediment transport events are detected. In considering sediment movement of this event, the authors conducted the calibration experiment of the hydrophone. The experiment showed the relation between an observed value and the particle size of sediments, and the performance of the hydrophone. This presentation reports the trial of sediment movement quantification using the experimental results
