Dwarf Fortress Bug Tracker - Dwarf Fortress
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IDProjectCategoryView StatusDate SubmittedLast Update
0001177Dwarf FortressDwarf Mode -- Flowspublic2010-04-14 19:332014-01-27 14:37
Reporterabatishko 
Assigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusnewResolutionopen 
PlatformOSOS Version
Product Version0.31.03 
Target VersionFixed in Version 
Summary0001177: pressurized water starts flowing, then stops
DescriptionI have water flowing from a stream down 2 levels, then up one level from there in order to irrigate an area. Initially the water comes up through the hole in the floor, but then after a little bit it stops. Shutting on and off the floodgate at the stream level causes the flow to resume temporarily, but then it shuts off again.
Steps To ReproduceI've got a save file available. Turning on and off the floodgate at the stream level makes it work temporarily. Go to level 140 and pull the left-most lever in the room by itself.
Additional InformationThread: http://www.bay12games.com/forum/index.php?topic=54389.0 [^]
Map: http://mkv25.net/dfma/map-8478-ragbrand [^]
TagsIntentional/Expected?, water
Relationships
has duplicate 0000893resolved Footkerchief faillure to flood 
related to 0001635confirmed Footkerchief Water pumped through a u-bend near an ocean does not rise to or above ocean level 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2010-04-14 19:33abatishkoNew Issue
2010-04-14 19:34abatishkoIssue Monitored: abatishko
2010-04-14 19:34abatishkoNote Added: 0003593
2010-04-14 20:00Logical2uNote Added: 0003599
2010-04-14 20:37FootkerchiefNote Added: 0003608
2010-04-15 06:15abatishkoNote Added: 0003660
2010-04-15 06:16abatishkoNote View State: 0003660: private
2010-04-24 13:21abatishkoNote Added: 0004918
2010-04-24 13:21abatishkoNote Deleted: 0003660
2010-04-24 15:29NarosTag Attached: water
2010-04-29 04:14Logical2uRelationship addedrelated to 0001635
2010-04-30 07:59derigoNote Added: 0005746
2010-04-30 08:04derigoNote Edited: 0005746bug_revision_view_page.php?bugnote_id=0005746#r2120
2010-04-30 08:04derigoNote Edited: 0005746bug_revision_view_page.php?bugnote_id=0005746#r2121
2010-04-30 08:04derigoNote Edited: 0005746bug_revision_view_page.php?bugnote_id=0005746#r2122
2010-04-30 13:27DoctorZuberNote Added: 0005766
2014-01-27 14:37FootkerchiefTag Attached: Intentional/Expected?
2014-01-27 14:37FootkerchiefRelationship addedhas duplicate 0000893

Notes
(0003593)
abatishko   
2010-04-14 19:34   
I can't seem to find a way to attach the save file.
(0003599)
Logical2u   
2010-04-14 20:00   
Upload the file to the Dwarf Fortress File Depot if Footkerchief or Toady ask for it.

Although I'm personally tempted to file this under "water pressure behaving badly", which is kind of a given.

You're making a U-bend design, though - this was pretty notoriously buggy in the past, see http://magmawiki.com/index.php/40d_Talk:Water [^] for some examples.
(0003608)
Footkerchief   
2010-04-14 20:37   
The save might come in handy, yeah. You can upload it here: http://dffd.wimbli.com/ [^]
(0004918)
abatishko   
2010-04-24 13:21   
The save is uploaded to DFFD:
http://dffd.wimbli.com/file.php?id=2220 [^]
(0005746)
derigo   
2010-04-30 07:59   
(edited on: 2010-04-30 08:04)
Here's a long but relevant story:

I had a big underground quarry in one of my forts that I decided to muddy so I would have easy access to some cave trees without the cave threats. While filling it, I overdid it a little and ended up with 3-4/7 deep water in the whole quarry.

This quary was on the same level as a brook. I'd dug it there because a large magnetite cluster was visible in the brook wall. The cluster extended across both sides of the brook, so I had dug a passageway under the brook to the other side to get at the magnetite there.

To prevent this passageway from flooding completely while I was wetting the quarry, I covered the entrance with some floor hatches. When I'd overfilled the quarry, I decided to take the hatches out, let water fill the passage, and let pressure spread more water out over the other side. I figured I could pump the passage clear later.

Since the water was shallow, dwarves went for a swim and dismantled the hatches. Water filled the passageway, but it did not flow out onto the other side of the quarry. The water on the first side was still 3/7 everywhere because the passage was small.

Shouldn't pressure have caused the water to rise onto the other side? If so, why didn't it? Is the brook significant? In the real world, the water would not have filled the other area because of the air pressure in that pocket of quarry (there was no other way in but the now water-filled passage). Has toady modeled this behavior too and not told us?


small quarry large quarry
########brook############....
#.......<#brook#<
#.......<#brook#<
#.......<#brook#< (water)
#........#brook##
########brook##########,,,,
(0005766)
DoctorZuber   
2010-04-30 13:27   
I've done a whole battery of tests of fluid mechanics and haven't really seen anything that looks like a change. I'm pretty sure this is the same old 40d oddities, but we will see I guess.