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[dresdor]

I'm having a fun time trying to drain a lake into an aquifer.  Problem is that the lake bed is sitting at 1/7 water in most cases (near an edge that I'll have to deal with at some point its higher, but that's due to off-screen water rushing in).  Is this ever going to dry up, or is there some weird lake-bed tile that refuses to dry up completely?  Is there any way I can speed it along?

[jcochran]

That depends upon the lake. I assume you're draining a 'murky pool'. You can drain them easily enough. But when it rains, they start to fill up again even if you have a drain still going on. I've seen some that just get a bit damp when it rains... And I've seen some that flood for quite a distance over a level ground drain. In one case, the flooding was bad enough that I just simply built a wall sealing the breach by which the pool was drained in the first place. Didn't take long at all for what was left of the pool to fill up to 7/7.

[dresdor]

That depends upon the lake. I assume you're draining a 'murky pool'. You can drain them easily enough. But when it rains, they start to fill up again even if you have a drain still going on. I've seen some that just get a bit damp when it rains... And I've seen some that flood for quite a distance over a level ground drain. In one case, the flooding was bad enough that I just simply built a wall sealing the breach by which the pool was drained in the first place. Didn't take long at all for what was left of the pool to fill up to 7/7.

No this is a real lake, almost covers a whole 4x4 embark area.  The bottom is all loamy sand with a 1/7 (or deeper) water covering on it.  Distint from the river that is also on the map, which is called a river when looked at.  Not sure why it would keep a 1/7 level on it.  Even areas floodgated away and pumped keep a 1/7 once pumps are stopped

The absolute bottommost levels have been draining into an aquifer for almost a year now, still the upper levels are all 1/7 without showing signs of drying further.

[kingubu]

The wiki says that 1/7 water next to a lot of other 1/7 water evaporates more slowly that a lone 1/7 off by itself.  I've never seen this, but I've never drained a map spanning lake.

[AutomataKittay]

The wiki says that 1/7 water next to a lot of other 1/7 water evaporates more slowly that a lone 1/7 off by itself.  I've never seen this, but I've never drained a map spanning lake.

Seems around right in my experience. Though it could be a trick of perception with only a few being evaporated at any one time and more noticible with lesser amount.

It seems to take longer to evaporate underground than even cold surface, to me.

[JAFANZ]

can you pump magma into it?

[dresdor]

can you pump magma into it?

I'm going to let it sit for a while, and try to pierce the aquifer to find magma.

Interesting things are happening, though.  I am now trying to pump the 1/7 water, and it doesn't pump anything and the water doesn't go away.  Also randomly in a large area cleared of all incoming water sources, a few tiles will jump to 2/7.  There is quite a bite of 2/7 water running around that should have drained off by now.  I wonder if I set up careful collection areas and make a ton of buckets I can drain the remaining water that way.

Also trying to dam the river, got all the walls up but the middle one and dwarves refused to put it up (an hour//6 months of "construction nearly complete" and another dwarf fell and got injured in the space, now even after he is clear, they won't finish it.)

This is a !!FUN!! project

[Button]

In my experience lakes are infinite water sources... Though I've never had a lake completely contained within a single embark before.

[dresdor]

I abandoned and reclaimed just to see what would happen.  The lake fills back full 7/7 all levels before embark, and flushes like a toilet down into the aquifer (fun to watch).  However, I now have hippos and alligators making things difficult.  Fun times.

Some of the squares that were permanently 1/7 are not drying up.  not sure why, but I'm going to keep watching it if I can get my framerate up at all.  Stoppering the river should help with that (pumps not running, water not flowing on that side).

[kingubu]

The tiles of underground lakes that touch the edge of the map are infinite water sources.  I assume the same is true for above ground ones.

Going to need to block edge tiles off.

[EvilBob22]

Interesting things are happening, though.  I am now trying to pump the 1/7 water, and it doesn't pump anything and the water doesn't go away.  <snip>

Pumps don't do anything to 1/7 water in general, but anything 2/7 through 7/7 gets pumped completely dry.  It may refill if it is next to an aquifer tile or other permanent water source though.

[dresdor]

The tiles of underground lakes that touch the edge of the map are infinite water sources.  I assume the same is true for above ground ones.

Going to need to block edge tiles off.

The side touching the edge of the map is draining down into the aquifer, but that leaves 90% of the lake that should be dried up by now.