A set of generalized Boussinesq equations is derived for internal wave
s in a two-layer system; the effects of earth's rotation are included
by using the f-plane approximation; a forcing mechanism due to the int
eraction between a tidal flow and a small finite-amplitude topography
is included as well. These equations thus enable the study of the gene
ration of nonlinear internal tides and the effects of nonhydrostatic a
nd Coriolis dispersion on the evolution of the internal tide. Numerica
l solutions of the equations are presented. The three main appearances
of the internal tide are considered: a linear periodic wave, a cnoida
l-like wave, and a train of solitary wave sequences. In the latter cas
e the internal tide appears in a disintegrated form. Special attention
is paid to the conditions in which such a disintegration occurs, in p
articular to the influence of earth's rotation (Coriolis dispersion).
Critical parameters of dispersion are derived in terms of the strength
of the forcing; these parameters indicate whether the internal tide a
ppears as a coherent or as a disintegrated wave.