Basically, in this river there is a brown object above it, in which it looks dirty, and a flag in the water.dat that makes the water "real" transparent.
But in this mod I do not "replace" the texture of it.
I removed the object and changed the flag in water.dat, as it should be done.
Then the water will work as it should, it will use the texture of the particle.txd, it will have waves, etc.

(I used a translator)