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[Vehudur]

So I have this trio of major rivers here, all merging, two going over waterfalls (one 2z-level and a 5z-level and it's killing my FPS, so I want to dam them at their sources but have no magma.

I'm unsure how to do it.

EDIT:

I'm getting 15 fps, but I have a movie playing in the background and that's not fair, so it's like 60 fps actually.  Or it was when I didn't have a movie on last night.  But that's still unacceptable considering I have only 30 Dwarves, 7 cats and 10 !!Goblin!!s on the map.

Also, it's a tropical embark.

Oh, and there are hippos.

[slothen]

put waterwheels upstream, connect them to pumps along the side of the river downstream.  Connect that to some sufficient drainage area, preferably many z levels down.  Turn the pumps on, your water wheels should still work, watch the river dry up.

[Vehudur]

Did I mention the river is 39 tiles wide?

[Urist McMick]

Are there any rock shelves overhanging the rivers? Aside from that, all i can suggest is going down to the magma and pumping some up.

[Vehudur]

Are there any rock shelves overhanging the rivers? Aside from that, all i can suggest is going down to the magma and pumping some up.

No, which is no help

Alright, well, at least I know I can power the waterwheels.  I might build windmills instead.  lots of windmills.

[NKDietrich]

Could dig a big pit down to the circus and dump the river in there

[Urist McMick]

That'd just be ultimate framerate death

[Vehudur]

It is tempting to flood the caverns.

It WOULD drain off the map eventually right?

[NKDietrich]

It is tempting to flood the caverns.

It WOULD drain off the map eventually right?

Well there are plenty of ways to drain the river off the map. It is already draining itself off the map. But that would just lag you out and cause Fun.

[drvoke]

put waterwheels upstream, connect them to pumps along the side of the river downstream.  Connect that to some sufficient drainage area, preferably many z levels down.  Turn the pumps on, your water wheels should still work, watch the river dry up.

Did I mention the river is 39 tiles wide?

Actually, should still work.  It'd be a mini-megaproject.  Construct a floor over the river, use that to build a series of pumps over the water (powered by several doubled waterwheels) which pump the water from upstream to a channel that takes the water off to the side of the river to be drained off the map or whatever.

~~.###
~~pP.#~~
~~|#.#~~
~~pP.#~~
~~|#.#~~
~~pP.#~~
~~|#.#~~
--*#.##
,,,#--->to drainage
,,,####

[Vehudur]

Well there are plenty of ways to drain the river off the map. It is already draining itself off the map. But that would just lag you out and cause Fun.

Well, if I can get it to drain off in fewer tiles than it is now (It's doing a U shape around the map, so that's not hard to do), it should improve the situation some.  I hope.

Actually, should still work.  It'd be a mini-megaproject.  Construct a floor over the river, use that to build a series of pumps over the water (powered by several doubled waterwheels) which pump the water from upstream to a channel that takes the water off to the side of the river to be drained off the map or whatever.

~~.###
~~pP.#
~~|#.#
~~pP.#
~~|#.#
~~pP.#
~~|#.##
--*#--->to drainage
,,,###

That sounds fun.

Except the hippos.

[Emily]

Make a channel under the river that dumps it in the cavern, and ends just under the river, which can be sealed by floodgates, then build a walkway over the river and collapse it through the floor of the river.  The river should be diverted at least temporarily and drain out allowing you to install floodgates or walls in it.

Then close the floodgates in the channel you made so the river stops flowing into your cavern, cause that'll kill your framerate too.

The design should probably look like this from the side:

Code: [Select]

_____
    I
~~~~X
____

With ~ being the river bed, the X being the bank, I being a support, and _ being floors.  When you collapse it it should punch a whole in the bottom of the river while spans the whole length so the flow will be diverted.

Pumps are also workable, but my experience with that is the setup can be extremely frustrating and it's hard to pump out everything fast enough.  Especially if your river is really wide...

[Vehudur]

I guess I'll play the "lets punch a giant hole in the riverbed" game by channeling under it, building a platform over it and then collapsing it.  Think that'll work?  Or do constructed things not punch holes?

[arzzult]

If I were you I'd just use the pumps stretching across the river to temporarily empty out the down stream part then create a constructed wall dam there then remove the pumps.

[Gergination]

I guess I'll play the "lets punch a giant hole in the riverbed" game by channeling under it, building a platform over it and then collapsing it.  Think that'll work?  Or do constructed things not punch holes?

Now you're thinking like a dwarf.