断面変化部における河床変動に関する研究(I)

Abstract

In this paper, theoretical and experimental studies on the stable channel throughconstrictions are reported.The mean depth and energy gradient in each section through the channel constric-tion equals to the equilibrium uniform depth and slope defined for the uniform channelof which breadth equals to the breadth of each section. In the case of constantdischarge and uniform bed material, energy gradient in the state of equilibrium througha channel constriction with movable bed is almost constant.With the use of the above results, the profiles of mean bed through constrictionscan be easily calculated, and the results show the good agreements with the experi-mental profiles.Shapes of cross-section vary with the change of breadth. Author made clear someproperties of these variations.