Abstract
The behavior of bores in a channel of constant water depth caused by the breaking of a dam is investigated. The basic equation in this problem are derived on the basis of Whitham's assumptions in the dam-break problems on dry bed, and they are solved on the assumption that the ratio γ of water particle velocity to wave-front velocity in a bore only depends on the relative water depth h0/h1, across the dam initially set. The validity of the solution is examined in comparison with laboratory experiments, it is concluded that the solution is applicable for a relatively long time after the formation of a bore. It is also discussed with a moving hydraulic jump condition in the dam-break problems.
