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Author Topic: Stagnant water and infection  (Read 943 times)

Aravin

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Stagnant water and infection
« on: January 29, 2013, 03:48:39 pm »

This is a new stuff for me. I always made well with stagnant water - does it really induce infection if a doctor washed wound with it? I never had infection before, even though doctors always used stagnant water.
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Telgin

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Re: Stagnant water and infection
« Reply #1 on: January 29, 2013, 04:03:36 pm »

Realistically it would, but DF and reality diverge more often than not.  I believe it does increase the chances of infection, but this is probably almost if not completely countered by using soap.

Do you normally have soap available for your hospital?
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Aravin

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Re: Stagnant water and infection
« Reply #2 on: January 29, 2013, 04:28:36 pm »

Ah ye, i do have soap.
That is the reason, i see. It's just quite hard to get non stagnant water without pump in no-river location.
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PhoenixEggz

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Re: Stagnant water and infection
« Reply #3 on: January 29, 2013, 07:36:15 pm »

I've developed a simple way to cure that issue if it's ever a problem.

Let's say you have a murky pool. Dig a channel right next to it (but not  and make it go three tiles down. After this, make it travel in a diagonal (to eliminate pressure from the wall) into a very short tunnel. At the end of the tunnel, use a screw pump to pump the water into a appropriately sized cistern. Build a well above said cistern.The water is now clean, and the result is a well of clean water on the same level as the water of the murky pool. If you want to move the well down z-levels, increase the drop.

It's not that hard to set up once you know what you're doing. I don't mind getting screenshots of a working one of these if i'm confusing. The only problem I've run into is the pools going dry, and thus the well
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vanatteveldt

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Re: Stagnant water and infection
« Reply #4 on: January 30, 2013, 11:56:04 am »

I've developed a simple way to cure that issue if it's ever a problem.

Let's say you have a murky pool. Dig a channel right next to it (but not  and make it go three tiles down. After this, make it travel in a diagonal (to eliminate pressure from the wall) into a very short tunnel. At the end of the tunnel, use a screw pump to pump the water into a appropriately sized cistern. Build a well above said cistern.The water is now clean, and the result is a well of clean water on the same level as the water of the murky pool. If you want to move the well down z-levels, increase the drop.

It's not that hard to set up once you know what you're doing. I don't mind getting screenshots of a working one of these if i'm confusing. The only problem I've run into is the pools going dry, and thus the well

Why do you place the pump at the bottom, instead of placing the channel 1 tile away from the pool and pumping the water directly into the cistern below the channel (with u-bends, diagonals and grates as needed).

Also, I found that it is important to not make the cistern too large. Since evaporation happens when there are 1/7 tiles, it is important to make sure that all available water tiles are filled up to at least 3/7 of 4/7 to prevent evaporation
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Skorpion

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Re: Stagnant water and infection
« Reply #5 on: January 30, 2013, 02:02:24 pm »

Would it be feasible to use a pump to filter the water?

I've found that a well ends up with all sorts of contaminants in it from washing dwarves. Would setting a pump up with a simple dwarven reactor clean the water, or just cause flooding?
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vanatteveldt

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Re: Stagnant water and infection
« Reply #6 on: January 30, 2013, 02:39:36 pm »

Would it be feasible to use a pump to filter the water?

I've found that a well ends up with all sorts of contaminants in it from washing dwarves. Would setting a pump up with a simple dwarven reactor clean the water, or just cause flooding?

Why not create two wells/cisterns, and pump water from one to the other until the first is dry and then repeat. That way you are sure not leave contaminants in the water... (ofc this will let some water evaporate so if water is scarce this might not be best...)
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PhoenixEggz

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Re: Stagnant water and infection
« Reply #7 on: January 30, 2013, 03:56:07 pm »

I've developed a simple way to cure that issue if it's ever a problem.

Let's say you have a murky pool. Dig a channel right next to it (but not  and make it go three tiles down. After this, make it travel in a diagonal (to eliminate pressure from the wall) into a very short tunnel. At the end of the tunnel, use a screw pump to pump the water into a appropriately sized cistern. Build a well above said cistern.The water is now clean, and the result is a well of clean water on the same level as the water of the murky pool. If you want to move the well down z-levels, increase the drop.

It's not that hard to set up once you know what you're doing. I don't mind getting screenshots of a working one of these if i'm confusing. The only problem I've run into is the pools going dry, and thus the well

Why do you place the pump at the bottom, instead of placing the channel 1 tile away from the pool and pumping the water directly into the cistern below the channel (with u-bends, diagonals and grates as needed).

Also, I found that it is important to not make the cistern too large. Since evaporation happens when there are 1/7 tiles, it is important to make sure that all available water tiles are filled up to at least 3/7 of 4/7 to prevent evaporation

Good point there. I guess it's simpler for me to just begin it underground, rather than place the pump on the surface and pump it down z-levels, if that's what you're hinting at here.

My wells built like this normally have cisterns about 2x2, 3x3, or somewhere inbetween in size. In areas where the water freezes this becomes a problem in winter, though..
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vanatteveldt

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Re: Stagnant water and infection
« Reply #8 on: January 30, 2013, 04:18:28 pm »

Good point there. I guess it's simpler for me to just begin it underground, rather than place the pump on the surface and pump it down z-levels, if that's what you're hinting at here.

My wells built like this normally have cisterns about 2x2, 3x3, or somewhere inbetween in size. In areas where the water freezes this becomes a problem in winter, though..

Well I guess your setup is indeed simpler. Do murky pools refill if they are "breached"? I assumed that they needed to be intact to refill, so I pumped out the water rather than making a channel...

On problem is that I think you would really like to have a u bend with a grate in it to secure the inlet from swimmers and swimming bd''s, but a murky pool probably won't generate enough water to push it up the u bend... Maybe a retracting bridge in the top that you retract when the murky pool is full to replenish the cistern through the pump?


^^^\__ /^^^       <-- murky pool with channeled tile as breach
     |B|  _____   <-- B = retracting bridge
     | |_| %%  |  <-- $$ = pump from west
     |_#D__||__|  <-- #D = diagonal (and wall grate just to be sure)


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PhoenixEggz

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Re: Stagnant water and infection
« Reply #9 on: January 30, 2013, 05:36:09 pm »

Good point there. I guess it's simpler for me to just begin it underground, rather than place the pump on the surface and pump it down z-levels, if that's what you're hinting at here.

My wells built like this normally have cisterns about 2x2, 3x3, or somewhere inbetween in size. In areas where the water freezes this becomes a problem in winter, though..

Well I guess your setup is indeed simpler. Do murky pools refill if they are "breached"? I assumed that they needed to be intact to refill, so I pumped out the water rather than making a channel...

On problem is that I think you would really like to have a u bend with a grate in it to secure the inlet from swimmers and swimming bd''s, but a murky pool probably won't generate enough water to push it up the u bend... Maybe a retracting bridge in the top that you retract when the murky pool is full to replenish the cistern through the pump?


^^^\__ /^^^       <-- murky pool with channeled tile as breach
     |B|  _____   <-- B = retracting bridge
     | |_| %%  |  <-- $$ = pump from west
     |_#D__||__|  <-- #D = diagonal (and wall grate just to be sure)


Good idea, but I've never had invasions through the murky pools. Best to be safe though I guess, never even thought about grates! I don't think them being intact or not would be an issue though, as dammed rivers are said to fill up when drained and I don't see why it should be different for pools. In the last fort I used my design in, I never got to test this, as it never rained after I made the well, so I can't say.
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Sutremaine

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Re: Stagnant water and infection
« Reply #10 on: January 31, 2013, 10:44:11 am »

Water is generated when rain hits a River or Murky Pool tile. So long as you don't destroy any of those tiles, the pool will 'fill' as normal. Destroy one tile, and you lose... one tile's worth of pool.

When drawing water from murky pools I like to dig out the sides and allow the water to run into an underground cistern with the pump at the bottom and only the essential plumbing beyond that. This lets me catch all the water that the pool makes without having to store it all directly beneath the well. Usually I don't bother with any protective measures because it's a temporary situation, but for permanent protection I would use a floor grate rather than a wall grate.

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