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Author Topic: River be damed  (Read 648 times)

thburns

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River be damed
« on: January 26, 2013, 08:15:24 pm »
I have a warm embark and a 10 tile wide river I want to dam.
How would I go about this?
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HavingPhun

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Re: River be damed
« Reply #1 on: January 26, 2013, 09:11:37 pm »
Build a wall hovering over the river were you want to dam it. Use a support on the edge to keep it up.  Then deconstruct the support and the wall will cave in and dam the river. Thats how I would do it, but I never have so there maybe an easier way to do it. Now ill have to try this.
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thburns

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Re: River be damed
« Reply #2 on: January 26, 2013, 09:52:10 pm »
Funny thing is I just tried something like that. I built a floor spanning river with walls off one side. Channeled the area holding it up, but the walls deconstructed when they hit the river bottom, which is only one level down. So is there a difference between your suggestion and what I did, or rather why that would work while my attempt failed? They both seem like the same basic idea.
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joeclark77

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Re: River be damed
« Reply #3 on: January 26, 2013, 09:52:50 pm »
There's a wiki page on the various methods.  http://dwarffortresswiki.org/index.php/Dam

Note that the water will not rise higher than the level where the water comes into the map, so you're not going to create an many-z-level artificial lake this way.  HOWEVER if there's a waterfall, you can dam the lower part and everything will flood up to the level of the higher river.
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joeclark77

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Re: River be damed
« Reply #4 on: January 26, 2013, 09:53:40 pm »
Quote from: thburns on January 26, 2013, 09:52:10 pm
Funny thing is I just tried something like that. I built a floor spanning river with walls off one side. Channeled the area holding it up, but the walls deconstructed when they hit the river bottom, which is only one level down. So is there a difference between your suggestion and what I did, or rather why that would work while my attempt failed? They both seem like the same basic idea.
It won't work with constructed walls, only natural ones.
Maybe you could work something out with obsidian... but it's really better to try one of the other methods.
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Merendel

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Re: River be damed
« Reply #5 on: January 26, 2013, 10:14:56 pm »
Quote from: joeclark77 on January 26, 2013, 09:53:40 pm
It won't work with constructed walls, only natural ones.
Maybe you could work something out with obsidian... but it's really better to try one of the other methods.

If you've got access to plenty of magma you can obsidian cast a wall prety quick to drop into the river.   Alternitively just pump the magma into the center of the river.  Water and magma mix, make obsidian on the surface and the unsuported chunk caves in to the botom.
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Cerbsen

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Re: River be damed
« Reply #6 on: January 27, 2013, 06:16:00 am »
Set up a minecart magma shotgun  ;D

...or pump magma into the river

...or do like i did in a larger scale
http://www.bay12forums.com/smf/index.php?topic=122135.0
Spoiler (click to show/hide)


or like that...
Spoiler (click to show/hide)
water takes about 10 minutes to reach 0-1/7 level

...then build a 1x10 bridge across the river bed link it to a lever and pull it to raise the bridge

Spoiler (click to show/hide)
« Last Edit: January 27, 2013, 08:20:20 am by Cerbsen »
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