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[Ross Vernal]

Exactly what the title says!

I'm interested in building a nice few pump stacks to transplant the cavern lake to a Z-level below my fort, thereby flooding the world. Never having flooded the world with water, I was curious if any of you have seen the effects of it. Do migrants save me the trouble and drown? Caravans?

Should I wall off a part of the map with bridges, and create the artificial lake around it?

[Girlinhat]

Water flows off the map's edge.  You'll just end up with a lot more mud and a lot less FPS.

[Gamerlord]

Done it, but I had to carve out a basin.

[Ross Vernal]

Water flows off the map's edge.  You'll just end up with a lot more mud and a lot less FPS.

Of course it does. I figured that with enough pump stacks, I could keep enough water on the map to keep it perpetually flooded.

Done it, but I had to carve out a basin.

So you can't just have it go all the way to the edge? Shame...

[Ascyron]

I've done this a few times, yeah. Usually I wall off an area as large as I can (read: as close to the edge of the map as I can) and start pumpin'.
Bonus points: use MAGMA!

[Ubiq]

Of course it does. I figured that with enough pump stacks, I could keep enough water on the map to keep it perpetually flooded.

It would take a lot of pumpstacks to do this and would murder your framerate, reanimate it, and murder it again for fun.

Bridges are the easiest way to make this work. If you don't like the appearance of the bridges, there's always casting obsidian, but it's a lot more work.

[bombzero]

Bridges are the easiest way to make this work. If you don't like the appearance of the bridges, there's always casting obsidian, but it's a lot more workFun.

FTFY

[Vattic]

Before it flowed off the edge of the map I did this with magma a handful of times.

[Frogwarrior]

Water flows off the map's edge.  You'll just end up with a lot more mud and a lot less FPS.

Of course it does. I figured that with enough pump stacks, I could keep enough water on the map to keep it perpetually flooded.

Water's gonna run off the edge of the map faster than it enters your plumbing. Sorry, no go there.

[bombzero]

Water flows off the map's edge.  You'll just end up with a lot more mud and a lot less FPS.

Of course it does. I figured that with enough pump stacks, I could keep enough water on the map to keep it perpetually flooded.

Water's gonna run off the edge of the map faster than it enters your plumbing. Sorry, no go there.

use 150 pumpstacks, problem solved.

on a serious note, while you cant flood the entire map,
1) try building a 20 Zlevel high cistern, with a floodgate wall at the bottom pointing out from your entrance hall towards a nice pit with good drainage.
2) open it when invaders come and laugh at the miracle of pressurized water.

[Frogwarrior]

150 pumpstacks sucking air won't help...
I suppose it would depend on how much of the cavern lake is adjacent to map edge. If the lake is large sections of the border, and especially if it is several Z-levels deep at the border, you might have something workable. Of course, you may want to have some pumpstacks go horizontally and vertically so that the outflow is evenly spaced along the map edge, since the inflow probably won't be.

[Girlinhat]

Essentially, you can sustain 1 edge tile drenched in water for every lake or river that intakes from the map edge.  Unless you're on an ocean and causing a tide, I don't think you'll find enough water entering your map to sustain a flood.

[Malarauko]

I'm going to build a dam in my valley and then flood part of it to create a large artificial lake just because of this thread. INSPIRATION!

[Jurph]

I'm going to build a dam in my valley and then flood part of it to create a large artificial lake just because of this thread. INSPIRATION!

Be sure to designate the floor of the artificial lake a Restricted Area, and then designate high-traffic pathing around the perimeter.  Otherwise dwarves will attempt to path through it during surface errands.  For bonus points, build a tower island in the center of the lake with a sheltered fishing shack.  Dwarves can come up from below, walk to the indoor pier, and retrieve fish without seeing invaders, deer, squirrels, startling rocks, or anything else that could terrify them.

[miauw62]

Water flows off the map's edge.  You'll just end up with a lot more mud and a lot less FPS.

Of course it does. I figured that with enough pump stacks, I could keep enough water on the map to keep it perpetually flooded.

Kills your fps tough.
So youre actually going for island-style thingy?

Intresting and hard.
But enough pump stacks should do it.