  We discuss the kinetics of the disordered interacting Bose gas using the
Boltzmann transport equation. The theory may serve as a unifying framework for
studying questions of dynamics of the expanding Bose gas at different stages of
the expansion. We show that the transport theory allows us to straightforwardly
reproduce and generalize a number of results previously obtained from
microscopic models in different formalisms. Based on estimates for the
interparticle scattering rates, we discuss the relevance of interaction effects
for the localization problem in the interacting disordered Bose gas. We argue
that, if the number of particles is large enough, the size of the expanding
cloud may exceed the localization length. We describe the spreading of the wave
packet in this regime as collision-induced diffusion and compare the obtained
rate of expansion to known results on subdiffusive spreading in nonlinear
disordered lattices.
