You might have a gander at elmokki's post on how to adapt the graphics from Jason Lutes' maps here:
http://forum.shrapnelgames.com/showthread.php?t=45454
Elmokki has even provided the .PST with templates.
As for names, something referring to the nice spiral of water might be good. Not sure if you're going for a themed/scenario map, or a generic one. Anyway, here are some ideas around the spiral..
- Nautilus
- Death Spiral
- Spring-Loaded
- Can of Worms
- Concentric
- Spiral Frog
- Spirograph
- Suncatcher
- Pinwheel
Hopefully something catches your eye
