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[zkline]

Hi All,

I'd appreciate it if someone would be so kind as to help me figure out what's happening in this fort. I'm not as familiar with fluid dynamics as I should be. I suspect I inadvertently dug under a brook, hence the "dangerous terrain," cancelation. Did I  accidentally flood the fort, or just trap my miner?

Any info would be appreciated.

[DukeLeto2]

Nope, you're good. You did flood that area, but your dwarves had time to get out. I canceled all digging designations, then assigned every dwarf to an above-ground burrow. I'd upload the save, but I don't have the cash to pay for hosting sites.

[Shonai_Dweller]

Nope, you're good. You did flood that area, but your dwarves had time to get out. I canceled all digging designations, then assigned every dwarf to an above-ground burrow. I'd upload the save, but I don't have the cash to pay for hosting sites.

Bay12games have their own file hosting site for saves and other stuff.

http://dffd.bay12games.com

[zkline]

For future reference, would I have avoided flooding by going a little deeper first? I'm not quite clear on what happened, mechanics-wise.

[Vivalas]

Nope, you're good. You did flood that area, but your dwarves had time to get out. I canceled all digging designations, then assigned every dwarf to an above-ground burrow. I'd upload the save, but I don't have the cash to pay for hosting sites.

Besides DFFD, there are dozens of free hosting sites, such as Google Drive, Mediafire, and Dropbox, as the 3 main reputable ones.

[daggaz]

The wiki article on water and mining explains it perfectly.

[Dunamisdeos]

*theme music intro*

WHATS THAT IS IT A QUESTION ABOUT WATER AND PRESSURE AND THE SAFE USE THEREOF?!?!?! I THINK IT IS DEFINITELY AN EXCUSE TO RE-POST SOME WATER DIAGRAMS YES IT IS.

*diagrams fly from Dunamisdeos' outstretched hands*

Spoiler: On creating a safely sealed, accessible waterway (click to show/hide)

The main thing is to create a renewable (or at least vast in volume) course of water for sick or injured dwarves, and for non-dwarf residents. However, you don't want dangerous baddies to sneak in to the system from outside, and you don't want to flood your fort.

Below is a 100% SUPER GREAT SERIES of diagrams showing how to do all this safely. So long as the water source is large enough, you can pump water to anywhere in your fort. Use grates as shown to prevent anything from entering your fort through the water system. You can even link the grates to levers if you want to access those sections of pipe later (for cleaning, perhaps). This is also the purpose of the drains in each section of pipe.

Grates are invulnerable from below, BUT it's important to note that there must be no accessible path to the rear (right hand) grate (see third diagram). This is the reason for the front (left most) grate.

Spoiler: On piercing water sources (click to show/hide)

You can almost always use this method to safely pierce a source of water from the side or above. Be sure to only pierce it after your safe pipeline is completed.

You can also pierce an aquifer from below to achieve this effect. It is more dangerous in terms of initial drowning, but hey, no baddies will ever come through your pipe if it's sourced from solid rock.

Spoiler: A GREAT diagram for GRATES ah-hah-hah (click to show/hide)

It is also easy to add wells to your underground pipe system. Just make sure that the water flows diagonally from the pressurized pipe to the well area. Your dwarves should have no problem escaping the rapidly filling well area, and the water will not rise above the well level.

Spoiler: Visual on diagonal water movement (click to show/hide)

It's worth noting that there has been concern that when adding a new well onto the system that dwarves will get caught and drowned as the well fills.

In my experience constructing it exactly as shown and making that one-space connection to the main pipe allows the water to flow diagonally in two directions, which fills slow enough that a dwarf will always escape.

*theme music outro* yeah I really like to take any excuse to post this talk about this subject.

*vanishes in smoke*

[zkline]

*boggles at the inaccessible diagrams*

[anewaname]

The third image is excellent!

[zkline]

I'll take your word for it.

More to the point, should I not have gotten a "damp stone," warning? I don't see one in the game log, at any rate.

[Dunamisdeos]

You can turn those off (with DF-Hack only, I think?), maybe they've been disabled.

Or at least, you can turn off the pause-upon-damp-stone-warning.

[They Got Leader]

Oh my god, Ski-Free yeti for the win. Thank you for the educational images.

[PatrikLundell]

You do not get "damp stone" warnings when digging staircases up through the aquifer from below (I haven't looked at the save, so I don't know if that's relevant here).

And, zkline, I think you need to be more explicit, since not everyone may browse all sub fora, and so may not know why a "random poster" can't access pictures when the links seem to be working.

[Insert_Gnome_Here]

You don't need DFhack to turn damp stone announcements off. 
The Announcements file configures all the behaviours of these kind of things. I like to make any deaths pause the game and centre on the relevant place.

[PatrikLundell]

Turing damp stone off in announcements.txt only causes the pausing to stop (and announcements to be suppressed, if that's done as well), but it does not cause the mining to continue, i.e. DF unmarks the wet stone for digging regardless, so you end up with dorf just not doing what you thought you had told them to do. A "dig here, dammit! I know what I'm doing" command would be useful when digging below lakes or above the magma sea and you know you won't actually get any breach.