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DF Gameplay Questions / Re: Underground lakes
« on: September 29, 2011, 12:51:21 pm »
Regarding waterwheels in a channel, I've got a similar setup in my current fort. Only I'm not using two lakes, I'm using streams on two levels (There is a natural waterfall from one down to the other).
I originally had my tunnel tap into the top stream, go down a couple levels of ramps, through a depressurizer, and then into a long channel and finally out a fortification carved in the cliff side and fall to the lower stream. But I found the flow through the depressurizer was too slow and the last third of my channel never got deep enough for waterwheels to work. So I removed the depressurizer and crossed my fingers, hoping the water wouldn't overflow. I had floodgates in place to shut it off if it did, but I didn't need them. Since it has an exit on its own level, it doesn't rise up and flood the waterwheel room.
My channel is only one tile wide. So far I've got a dozen waterwheels set up, which should be more than enough to power my magma stack, if I can ever get it finished. I've got no sand or iron ore on my map, so building magma safe corkscrews relies on importing materials.
I do notice that the flow in the stream below where I tap into it is reduced. The water used to be 7/7 deep right up until a few tiles before the falls, but now it gets shallow quite a bit earlier. It's only 1/7 or 2/7 for 10-15 tiles above the falls. I think if I had a wider channel for the waterwheels, I'd either have too little flow to maintain deep enough water, or else I'd drain so much from the stream that it would just become a trickle.
I originally had my tunnel tap into the top stream, go down a couple levels of ramps, through a depressurizer, and then into a long channel and finally out a fortification carved in the cliff side and fall to the lower stream. But I found the flow through the depressurizer was too slow and the last third of my channel never got deep enough for waterwheels to work. So I removed the depressurizer and crossed my fingers, hoping the water wouldn't overflow. I had floodgates in place to shut it off if it did, but I didn't need them. Since it has an exit on its own level, it doesn't rise up and flood the waterwheel room.
My channel is only one tile wide. So far I've got a dozen waterwheels set up, which should be more than enough to power my magma stack, if I can ever get it finished. I've got no sand or iron ore on my map, so building magma safe corkscrews relies on importing materials.
I do notice that the flow in the stream below where I tap into it is reduced. The water used to be 7/7 deep right up until a few tiles before the falls, but now it gets shallow quite a bit earlier. It's only 1/7 or 2/7 for 10-15 tiles above the falls. I think if I had a wider channel for the waterwheels, I'd either have too little flow to maintain deep enough water, or else I'd drain so much from the stream that it would just become a trickle.
