¥Energy of WP is partially transferred to ZF and
partially dissipated at large kÕs.
¥2 regimes: random walk/diffusion of WP in the
k-space (Balk, Nazarenko, Zakharov, 1990),
¥Coherent wave – modulational instability (Manin, Nazarenko, 1994, Smolyakov et at, 2000).