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Author Topic: I just learned something very strange regarding water  (Read 3476 times)

Kanddak

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Re: I just learned something very strange regarding water
« Reply #15 on: October 02, 2009, 06:31:51 am »

IIRC there are U-bend bugs that create infinite water.

Not any more; only in old versions.

Cephalo, you might want to compare with this: http://www.bay12games.com/forum/index.php?topic=42571.0
Could that be what's happening on your map?
It would be helpful if you posted a save.
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cephalo

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Re: I just learned something very strange regarding water
« Reply #16 on: October 02, 2009, 07:57:54 am »

IIRC there are U-bend bugs that create infinite water.

Not any more; only in old versions.

Cephalo, you might want to compare with this: http://www.bay12games.com/forum/index.php?topic=42571.0
Could that be what's happening on your map?
It would be helpful if you posted a save.

Yes this could be the problem. My fort is jutting out into the ocean a bit, and the bottom of the loop is at sea level. I bet it's the same issue. I don't wanna post a save because this is my most epic fort ever, and I don't want anyone to see it before it's finished.  ;D
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Sphalerite

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Re: I just learned something very strange regarding water
« Reply #17 on: October 02, 2009, 08:05:19 am »

I had a very strange similar bug on a recent fort.

I had on this fort an aboveground river which was frozen for part of the year.  To give my dwarves a reliable supply of water I dug out a large multi Z-level underground cistern.  On the bottom level of the cistern was an inlet channel closed off with floodgates leading to a staircase dug up to the river.  I made the final connection between the staircase and the river when the river was frozen.   When the river thawed in the spring water filled the staircase and the bottom-most level of the cistern, but wouldn't rise any further, despite the bottommost level of the cistern being at least ten Z-levels below the river level.

Later while working on additional fill lines I closed the floodgate connecting the bottom of the cistern to the river.  When I reopened the floodgate (but before I had connected any other fill lines) water began flowing from the river into the cistern, eventually completely filling it.

So there's something weird still with water movement and stairs.  It's as if stairs cancel pressure similar to how a diagonal passage does ... but only sometimes.
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cephalo

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Re: I just learned something very strange regarding water
« Reply #18 on: October 02, 2009, 03:27:17 pm »

Ok, I was able to raise the level of the bottom channel one Z level, and this fixed my fountain. Is there any other explanation other than sea level being a depressurizer? I'm thinking of adding it to the wiki.

I was very lucky to be able to do this without ruining my whole obsidian cast fort! It's almost completely carved out already.
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Praisegems - Snarlingtool - Walledwar

Gergination

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Re: I just learned something very strange regarding water
« Reply #19 on: October 02, 2009, 04:17:15 pm »

I would probably file a bug report as well if it isn't already in there.
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cephalo

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Re: I just learned something very strange regarding water
« Reply #20 on: October 02, 2009, 11:45:37 pm »

I would probably file a bug report as well if it isn't already in there.

I don't actually think it's a bug. If you think about it, it's a solution to the problem of water landing on top of the ocean. Without a special rule for sea level, you could flood your map eventually by dumping water into the ocean, which would be undesireable. The ocean probably should be a place where you can dump water, and this is how it is handled.
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PerfectWorldDF World creator utility for Dwarf Fortress.

My latest forts:
Praisegems - Snarlingtool - Walledwar

Syff

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Re: I just learned something very strange regarding water
« Reply #21 on: October 03, 2009, 01:56:12 pm »

I would probably file a bug report as well if it isn't already in there.

I don't actually think it's a bug. If you think about it, it's a solution to the problem of water landing on top of the ocean. Without a special rule for sea level, you could flood your map eventually by dumping water into the ocean, which would be undesireable. The ocean probably should be a place where you can dump water, and this is how it is handled.

A little testing on my part finds this applying to lakes, as well.  That said, I've found a few (ocean) sites where I've had water floating on top of sea level, and I haven't been able to figure out if there's any special rule for that just yet.
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