Latest Tamriel Rebuilt required
http://www.nexusmods.com/morrowind/mods/42145/

Replaces most TR static water meshes with activators emulating water splashing sounds.

Pros: works with Dongle's meshes without needing special redone lava-like collision meshes,
Cons: may eat 1 FPS, may not not work well for not square/not circular meshes at the moment,
there may be a few misplaced water sounds.

-abot