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[QuakeIV]

I need reatively simple stream draining system so i can pump my erstwhile subterranean farm complex out.

Any designs/ideas please? I wouldnt ask if i wasnt too burned out to work on my own for longer then i already have.

[goron72]

I'm a bit confused about what you're asking. Do you want to have a farm on the riverbed? That would require damning. Do you want to drain out of the stream, (floodgates and channels)? Do you want to be able to drain water into a stream (channels with grates or floodgates depending on what you want)?

[Nexii Malthus]

So you either need to to divert a stream into your farm complex to make muddy stone.

Or your asking for a good drainage system to clean up the farm.


I'd advise using a sort of airlock-ish system. Basically diverting a stream into a cistern above the farm.
The cistern has to be big enough just to cover the farm in 1/7 water and a little extra to make sure it covers. The low 1/7 water should evaporate and you can continue dwarf work.

So all you need to do is fill up the cistern. Close the floodgates or stop the pumps filling it. Then let the cistern drop into the farm. Probably best via a large retracting bridge.

The difficult part is calculating the area of your farm so you can figure how big your cistern needs to be.

[Hyndis]

You could even use a bucket brigade to make your farm. Just make a whole bunch of plain wooden buckets and put your dwarves to work for a while. Its not fancy, but you can create a farm anywhere without having to build much in the way of infrastructure to support it.

You will need a two level room to do this. The bottom level is the farm itself, and the top level is where the buckets of water are dropped. But that is the only requirement to do so.

[goron72]

It's not to hard to ensure you have space for evaporation. Even with thousands of 2/7 and 1 1/7 your farm will eventually dry. Just keep (k)'ing the farthest tile until you have complete muddiness then close the floodgate. Wait awhile and you're done! If I still had the fortress I'd show you my setup, extremely easy though so it would be pointless anyway.

[Aeltar]

I believe farming can be done in up to 2/7 water, and I'm almost completely sure 1/7 at least.  Dwarves don't care about depths that shallow, either.

[kefkakrazy]

Buildings, I think, refuse to be placed or constructed in anything but 1/7. Correct me if I'm wrong; my farm-flooding attempts usually leave me needing to wait for a couple 2/7 stragglers to flow out before I can designate the area.

[QuakeIV]

Sorry for not being clear, and the slow reply, i want on for a few days.

My farming complex is completely flooded with water, because i dug my moat wrong.

[Reese]

make a shaft below the stream that goes down to a rock layer, make a tunnel from that to the nearest edge of the map, smooth and fortify the map edge tiles so the water can get out, put in some flood gates, breach the bed of the river so it flows into the shaft, through the tunnel, and out the fortifications... if you make the shaft cover the width of the stream and use a cavein to breach the entire river bed, no water should flow past where you breached it.

[Grendus]

You can use pumps, drainage, or a diversion.

Water can be pumped back into the river faster than it comes in, you just need some basic knowledge of pump stacks and power. This should be use as a stopgap method only though, as it will consume a lot of computer power and if a megabeast or buildingdestroyer smashes any one of the pieces the whole stack stops pumping water.

Water can be rerouted into an area of infinite drainage. Chasm, bottomless pit, aquifer, stream/river, or edge fortifications can swallow up all the water you want to pump into them. Once your area has drained sufficiently, wall off the problem area and you're set.

The entire river can be rerouted, just dig a new route under the old one and use a cave in to punch a hole in the floor.  Make sure there are natural walls under the new route or the river might accidentally be rerouted through your dining hall. Also make sure the new route can handle the volume of water going through it, a 1 tile wide channel won't carry a river's worth of water.

[MrFake]

Or use atom smashers.

1) Dig a room below the flooded room.
2) Build a raising bridge in this lower room.
3) hook it up to an accessible lever.
4a) Either dig a hole upward from there to the farm room,
or
4b) Dig a hole into the tunnel that leads into your farm from the water source.
5) Set the lever to be pulled on repeat (q->a->P->r).


(4a) is if you have something in place to block more water from flowing into the farm, like a door or floodgate.  (4b) is if you don't.  In that case, you divert the water from its source into your atom smasher room, then wall off or put a floodgate over the hole to keep the water out.

The atom smasher is a reliable, quick, and easy to implement method for eliminating any amount of fluid.  Use a decent sized bridge, like 5x5 or even the full 10x10, to make sure you get a good rate of elimination.

make a shaft below the stream that goes down to a rock layer, make a tunnel from that to the nearest edge of the map, smooth and fortify the map edge tiles so the water can get out, put in some flood gates, breach the bed of the river so it flows into the shaft, through the tunnel, and out the fortifications... if you make the shaft cover the width of the stream and use a cavein to breach the entire river bed, no water should flow past where you breached it.

Doesn't always work.  Sometimes water comes out of map edges, sometimes it goes in.