  A novel model of wave turbulence is presented which allows to explain in the
same frame various nonlinear wave phenomena: intermittency, form and direction
of the energy cascades, formation of a zero-frequency band with non-zero
energy, etc. as an effect of initial conditions, without any statistical
assumptions. Classical Kolmogorov-Zakharov spectra are obtained as a particular
case of the more general form of energy spectra. One of the most important
phenomenological consequences of the model is the termination of a cascade not
due to dissipation but because of the growth of nonlinearity. The model is
quite general and can be exploited for the description of an arbitrary wave
turbulent system.
