Fundamental Study on the Check of Drifting Woods (III)

On the mechanism of increase of water depth caused by accumulation of drifting woods at the stocade

Abstract

This paper describes the mechanism of increase of water depth caused by accumulation of drifting woods at the strcade, as the third stage of a series of study on the check. As a result of theoretical and experimental research, it makes clear the following points; (a) the phenomena of diving woods at the initial stage of accumulation process is the direct cause of increase of water. (b) maximum values of backwater depth are 1-2.4 times as much as the velocity head at no accumulation. (c) the experimental result coincides approximately the calculated curve by the suggested model on backwater profile