Well I finally got to the canal locks and boy was it good. As soon as I put the hydrophone in I was blown away by the richness and the diversity of the sound. I discovered that in large bodies of water, even enclosed, a change of depth of only a few centimeters can radically change the sound you get, and the closer you get to the surface the bigger the change is. Playing with the reflection of the sound on th canal walls was amazing too, combined with the current carrying the sound in different ways.
I started with recording the waterfall next to the weir sluice ; the recordings were very interesting, with the hydrophone getting caught in the eddies and such. Unfortunately the drop to the water was too big for the lenght of cable I had and so the mic kept hitting the canal walls.
But the mic inside the lock itself was amazing too. The big barges really had each a different sound and the eddies incredibly changed the dynamics of the sound too, from what was a virtually static mic.
https://clyp.it/y1nuvr4z 