v0.31 Talk:Well guide

Mud contaminant

Complete misinformation on this page. Wells DO NOT filter out mud or any other actual contaminant. If they did, water from wells could not be used to irrigate. It would not create mud on stone floor tiles. Mud is what makes water stagnant, NOT coming from a murky pool. You NEED to filter out mud to stop the bad thought that comes from drinking stagnant water. Grates and bars filter out contaminants. I have verified this. You can too, well users, look at your stock screens. Tab to change modes. Look at all the water you own, even the stuff in buckets is stagnant if you are playing the latest version and you aren't cleaning with grates or bars. Unless you cleaned it first. There is one scenario I have not yet investigated, though: what happens if your well is above a grate, above water? This is not a bad idea in general, the grate will prevent anyone falling into the well from falling into the water. I haven't verified if passing through a grate this way even works, let alone filters contaminants.– unsigned comment by 71.222.187.247

Wrong. Wells do filter out mud. Since mud is created simply by having water on a tile, you can't have a well reaching water that isn't mud-contaminated. Try it - build a cistern, pump some water in (so it's completely uncontaminated), look at the floor of the cistern. "Stagnant" does come from murky pools specifically - the pool will give the water a grime coating, which in turn makes the water stagnant. --DeMatt 05:34, 28 November 2010 (UTC)

Both wrong as hell. Wells don't give a crap about mud. Mud is an object spawned on a floor tile when water enters that tile. It's just an object, not a trait associated to the tile itself. Murky pools and brooks are special, unique floor tiles which control the maner in which water evaporates from above them. Mud doesn't form on these tiles. When a well is over a murky pool or brook tile, it will assume that the water is stagnant and filthy, and THAT is where the negative thought comes from. Furthermore, water doesn't carry mud with it, it just stays there on the tile it initially formed on. Thus, you can't really filter the mud, as the water doesn't get muddy. The only "filtration" you can do is with salt water. The well guide already explains how to desalinate water, both the easy and the hard way, though I've yet to do the step-by-step on the hard way... (Or any of the step-by-steps, really...) Anyways, thanks DeMatt for fixing that.--Kydo 06:31, 29 November 2010 (UTC)

Oh, crap, looking back, I need to do a minor update to this. Mud still isn't a contaminant, but contaminants have become much more complicated. I don't remember reading about that being implemented, but there it is! I guess I'll have to build even more experiments... Damn. The nature of contaminants is weird. Some will mix with water, while others just appear as small piles and don't actually seem to interact with water at all! --Kydo 07:03, 29 November 2010 (UTC)

Where's the guide?

Linked here from the Well main page, which says "see the (recommended) Well Guide" ... I would like to read this guide :) --FleshForge 11:50, 10 August 2010 (UTC)

Yeah, this really should be updated. The 40d version of this page was kind of disorganized and vague at times anyways. I can clean it up a little to make sense for the new version of the game and post it here if nobody has any complaints about me doing so. --Kydo 15:20, 13 October 2010 (UTC)

Thanks. That would be great.Decius 20:56, 13 October 2010 (UTC)

Right, so, I've got what I've finished uploaded to my user page, if you want to look it over and tear it apart. It's not finished, as the step-by-step section is empty thus far. I will put more into it, but I want to use actual in-game screenshots as examples, to show that it all works. So that part may take a while. If you guys can help me on that, it'd be awesome. Oh, also, it is RIFE with unverified stuff. Like, I don't know if he fixed the "urist mcdorf fell down the well again" problem. I need to do a bunch of verification work. Which is part of what the working examples thing is about. --Kydo 03:50, 14 October 2010 (UTC)

Nobody's commenting. I'll just upload it in it's unfinished state and work on it as I find the inclination to. At the very least, it might set off an argument, which is better than nothing at all. Hopefully, having something actually on the page might prompt people other than myself to start making edits of their own, fixing my heapinng pile of mistakes. --Kydo 08:25, 16 October 2010 (UTC)

It might be useful to mention u-bends (see DF2010:Pressure). In older versions it was possible to lower the z-level of water with a series of u-bends, I suppose this still holds true in the current version. --92.224.74.71 15:18, 16 October 2010 (UTC)

Yes, it is. That's actually exactly how gravity-fed aqueducts carry water to their subterranean reservoirs. But the original well guide didn't really talk much about the behavior of water, preferring to linking to the page on pressure. It assumes you have read both the well page and the pressure page, and gives a fair bit of warning of the danger of flooding. Actually, I found a glitch in u-pipe filling. I haven't figured out exactly what causes it, but it seems that if you try to u-pipe fill a chamber that's already full of water, both water sources try to push down, and regardless of how much water is in either water source, push down with equal force, and go nowhere. I think it has something to do with the door separating the two opening, leaving an empty space, which both sources flow into, initiating the direction of flow, and once it's full, the game thinks it's done and just stops flowing. I think. I need to experiment with it more, because it only happens sometimes. Also, thanks for fixing my stuff a bit. I forgot that not all aquefers are salty. Actually, each water source should have a link to it's own page, so that you can learn more about them individually... Actually, reading over the page on pressure, it looks like it could use a little cleanup too... I'll get to it eventually. --Kydo 16:12, 16 October 2010 (UTC)

Mud doesn't dry?

"First, you need to "irrigate" underground floors before you can actually farm on them. Instead of making a separate, elaborate irrigation system for just one use, (To my knowledge, mud doesn't dry) why not just drain it out of your well?"- from Multitasking wells.

Actually when I started my last game there was already mud for farming underground, but I had forgotten seeds.(:/) And when I later checked there was not mud... -A4

Really? Because I have never seen anything about mud evaporating. Nobody has ever been able to confirm it. The only confirmed method of removing mud, is to build something on it, like a floor, and then remove the construction. My current fortress has been running for about four (game) years, and the mud I made for irrigation at the beginning has yet to dry. --Kydo 16:19, 10 November 2010 (UTC)

Danger of flooding?

Really? All this hoopla over flooding, and no mention of diagonal pressure reduction?

###X ###  
    ##0#
     ###

X=floodgate
#=tunnel
0=where you put the well one level above.

It couldn't get any simpler. I have never once filled up a reservoir by bucket. Once you understand that a diagonal connection removes ALL pressure, flooding should never be a problem. You get the benefit of pressure, quick delivery of the water, without the risk of flooding. GhostDwemer 17:11, 28 October 2010 (UTC)

You're right, diagona pressure gates can be handy. I can think of a more effctive design, though... A diagonal pressure gate only works riht under specific circumstances. If water has the ability to flow downward at any point after a diagonal pressure gate, it will be pressurized back to the gate's height. It also doesn't prevent water from flooding into the rest of the level it's on, which depending on where your well is located, can be a problem. If you depressurize water before it enters the well's reservoir, it will only fill the bottom level, which makes multi-level wells impossible. Ah, but if the fill pipe connects to the TOP edge of your reservoir, and fills diagonally, the game will depressurize the water as it enters the reservoir! Which means water will only ever be able to fill to the top edge! --Kydo 16:16, 10 November 2010 (UTC)