[drtherc]

I would think that an intermediate disturbance would be more on the line of strong waves and thunderstorms. A typhoon would be an extreme disturbance (depending on the depth we're talking about) more along the lines of a forest fire. So possibly a wavemaker takes care of some of the minor disturbances, but how do we 'replicate' stronger disturbances?
I guess we could mimic the 'hand of God' by running our hands blindly through the tank every year or two (LOL)