Don't think you need to modify anything to generate a water fall. However, I'm now not convinced a cave-in into the circus area works as it does normally. The reason for that is that water+magma seems to work as on SMR in my very recent attempt to get some remote controlled obsidian generation done there. If cave-ins fail it ought to work if you build a landing floor, though.
It shouldn't be that much of a project, provided you've established yourself in the target area. A single tile should be sufficient, if you prepare the landing site with walls and a drawbridge around that tile. The site should obviously be selected such that you have a suitable tile to drop, but then you just need to make a shaft all the way from the target area up to the tile below the aquifer.
Channel out the aquifer around the tile, and drop a ring of the level above to smash through the floor, bringing the aquifer tile in the middle along with it. Unless the cave in ring fuses with the aquifer tile, it should stop below the aquifer level, while the aquifer itself continues on downwards. Obviously, it's a good idea to cauterize the walls of the aquifer hole before this exercise, unless you want another waterfall there.
If the aquifer tile DOES fuse with the ring, the whole set stops one level below the aquifer level. You'd then channel out a 3*3 area below the ring (the middle is the hole, so it's already taken care of). Dig out a ring outside of the outer ring, hook up the aquifer tile to a support and then channel away at the ring from the outside, leaving a weeping aquifer tile hanging in the air. Pull the lever, and the tile should continue down to its destination. If you're cautious, you may want to add some additional drain, in case the weeping aquifer tile produces more water than a single tile shaft can swallow.
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Topic: A stupid aquifier question (Read 3071 times)