I believe there is info here in the 'Backroom', though not sure it's about animation. Also, the Cornucopia 3D store has waterfall objects, water splash and ripple objects, etc. for sale in Vue format. Probably such products in the Marketplace here as well - maybe not in Vue format though.

Don't know of any specific tutorials. My directory of Vue tutorials all over the Web does list a brief one from e-on:
"An animated slide show type tutorial, from the makers of the Vue 3D software, on animated noise sources in Vue 5 Infinite. These allow animated volumetric clouds, animated ocean surfaces (based on Procedural Terrains) and so forth."
http://www.e-onsoftware.com/support/tutorials/?page=19&cf=%2Fsupport%2Ftutorials%2F

If you find any good tutorials on waterfalls, i'd appreciate a list here, or link suggestions at my growing Vue tutorial directory:

_jc  'Art Head Start' e-book: Learn digital art skills $19.95
'Art Head Start.com Free chapter, Vue tutorials, models, Web Tutorials Directory.