Abstract
Interfacial wave is an underwater undulation under certain density structure of the sea. When interfacial wave enters to a slope, its wave height changes, its shape deforms and after the breaking it runs up as a bore. By test channel experiments adaptability of the small amplitude wave theory to estimate wave height is studied and obtains as a limiting condition, energy transporting velocity-wave ratio Cg/C=0.9, that is, the limiting facter is lower layer thickness. This thickness can be defined as a breaking condition of interfacial wave. After breaking, the bore proceeds decreasing its height. Relation between bore height and its velocity, internal Froude number Fi=0.46. Bore height is estimated by energy loss using Harleman's resistance coefficient τ.
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