1997 Volume 41 Pages 991-996
In order to estimate the sediment discharge and size distribution in moutain stream, a new method by means of collision sounds is developed.
In order to isolate the collision sound from noise, a small microphone was confined into a pipe, which was attached behind a board. When a gravel particle collides to the board, a tipical sound generates, whose amplitude is expected to distribute with some definite function for each size class.
In this paper, a new estimation method of the sediment size distribution is derived based on the factor analysis method and applied to some flume experiments.
