Abstract
Fundamental properties of high velocity flows in a continuously meandering channel are studied analytically and experimentally. The linearized equations of the depth averaged flow model with the inertia term of momentum equation in the transverse direction, which is equivalent to Hasegawa's equation, is derived by use of the.power series expansion of transverse coordinate. Through the examination of the fundamental characteristics of the solution, it is shown that the resonance between the free surface variations and the channel meandering occurs with the increase of Froude number. The laboratory tests are carried out to verify the existence of resonance relation, changing the bottom slope of a channel. The comparisons of the analytical solution with the experimental results indicate that the resonance can be observed at the Froude number predicted by the theory and the amplitude of free surface variations in the experiments depends on the amplitude of the channel meandering.
