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Author Topic: Water problem  (Read 999 times)

fortressdwarf

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Water problem
« on: February 21, 2009, 10:47:03 pm »
I have build a water tunnel, U-shaped with respect to the z-axis so as to avoid to go around a hallway. For some reason the water level on one side of the "U" is one z-level below the other. I tried adding another branch to the U-tunnel, but it still won't equalize. Does anyone have any ideas on why this is the case?
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Savok

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Re: Water problem
« Reply #1 on: February 21, 2009, 11:26:46 pm »
That's completely normal. Read the wiki page on fluids.
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fortressdwarf

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Re: Water problem
« Reply #2 on: February 21, 2009, 11:49:10 pm »
That's not normal, it implies different water pressures in each portion of the U for the same height value. This would only be caused by different atmospheric pressures on either sides or variable density of the water. In dwarf fortress I think that they assume constant atmospheric pressure for all locations and incompressible flow (physically speaking water is very close to a purely incompressible). I just checked the wiki, and it seems to indicate that the water should rise to the level of the source.
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fortressdwarf

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Re: Water problem
« Reply #3 on: February 22, 2009, 12:08:37 am »
Could this be a bug?
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AncientEnemy

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Re: Water problem
« Reply #4 on: February 22, 2009, 04:43:03 am »
is there a hatch anywhere in the works? ive had weird issues with water and hatches, such as a 9 z level deep shaft of water that wouldn't go up 1 level on te opposite side of a U bend when a (open) hatch was there.
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Savok

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Re: Water problem
« Reply #5 on: February 22, 2009, 10:56:11 am »
No, really. Due to how DF simulates water, that IS completely normal. READ THE WIKI PAGE ON WATER.
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winner

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Re: Water problem
« Reply #6 on: February 22, 2009, 11:17:59 am »
Imagine you have a U with one side one tile more full of water than the other. That tile teleports over to the other side to fix that and WOOPS that other side is now higher so it teleports over to fix that and WOOPS...

so water looses some pressure whenever it goes through a bend.
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Untelligent

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Re: Water problem
« Reply #7 on: February 22, 2009, 12:14:32 pm »
Pressurized water will only flow up to the z-level below the source. Not the same one as the source.

Completely normal (well, for the purposes of the game, anyway). This is exactly what it's supposed to do.
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