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Editing 40d:Irrigation
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− | + | '''Irrigation''' is the process of making rocky ground suitable for [[farming]]. This is usually done by [[flood]]ing it with [[water]]. Inside [[cave]]s, [[rock]] cavern floor tiles that are covered with water instantly become muddy tiles, which you can then build [[farm plot]]s on. There are many possible methods for getting the farm area muddy. | |
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− | '''Irrigation''' is the process of making rocky ground suitable for [[farming]]. This is done by [[flood]]ing it with [[water]] | ||
− | + | Dwarf Fortress uses realistic water dynamics, including measures of [[water depth]]. A depth of 7 is full, depths of 1 will evaporate, leaving the stone wet and thus suitable for farming. Your goal in irrigation is to get a section of ground to be 1/7s. | |
− | + | == Dryland farming: farming without irrigation == | |
− | [[ | + | Some locations have layers of [[soil]] a few z-levels thick. It is not necessary to irrigate soil in order to grow crops on it; it is possible to build a farm plot directly on any soil tiles, although the dwarven crops such as [[plump helmet]]s can only be grown in a [[subterranean]] plot. In lowland areas, a farm plot built on any tile marked [[Outside]] can be used to grow outdoor crops such as [[prickle berry|prickle berries]]. This method obviates the need for irrigation entirely, so is recommended for newbies. |
− | + | == Easy irrigation == | |
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# {{K|d}}ig from the [[farm plot]] to any source of water, but keep a single tile of [[wall]] between the newbuilt passage and the water. | # {{K|d}}ig from the [[farm plot]] to any source of water, but keep a single tile of [[wall]] between the newbuilt passage and the water. | ||
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# Enjoy your newly irrigated land. | # Enjoy your newly irrigated land. | ||
− | == | + | == Reservoir irrigation == |
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The reservoir method involves building a small reservoir between two [[floodgate|floodgates]] and a farming chamber about 7 times as large as the reservoir. A reservoir of 12 tiles, for instance, can water a 70 tile chamber effectively. Water is let into the reservoir by lowering, then raising one floodgate. The other floodgate then releases the water into the farming chamber. It spreads around, then evaporates after becoming 1 deep. | The reservoir method involves building a small reservoir between two [[floodgate|floodgates]] and a farming chamber about 7 times as large as the reservoir. A reservoir of 12 tiles, for instance, can water a 70 tile chamber effectively. Water is let into the reservoir by lowering, then raising one floodgate. The other floodgate then releases the water into the farming chamber. It spreads around, then evaporates after becoming 1 deep. | ||
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It is possible to achieve the same result using a natural pond as the water reservoir. Doing so is easier in the short term but it is not advised if you want to keep replenishing your reservoir for other uses, such as [[well]](s), for natural ponds have a very finite amount of water available. On particular maps, natural ponds can replenish themselves at the beginning of each spring. | It is possible to achieve the same result using a natural pond as the water reservoir. Doing so is easier in the short term but it is not advised if you want to keep replenishing your reservoir for other uses, such as [[well]](s), for natural ponds have a very finite amount of water available. On particular maps, natural ponds can replenish themselves at the beginning of each spring. | ||
− | + | === Worked Example === | |
To create this irrigation system, you need: [[Image:Tree_farm.png|right]] <!-- GreyMario sez: Had to play around with the placement for this image. This looks like the best spot for it, as it doesn't interrupt the Wood FAQ. --> <!-- Fastjack's comment: You got a problem with this system after cave-ins are reinstated --> <!-- GreyMario: Oh, right. Okay. It won't be too hard to modify that design, though. Water can flow through supports IIRC. --> | To create this irrigation system, you need: [[Image:Tree_farm.png|right]] <!-- GreyMario sez: Had to play around with the placement for this image. This looks like the best spot for it, as it doesn't interrupt the Wood FAQ. --> <!-- Fastjack's comment: You got a problem with this system after cave-ins are reinstated --> <!-- GreyMario: Oh, right. Okay. It won't be too hard to modify that design, though. Water can flow through supports IIRC. --> | ||
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When you do breach the water source, immediately forbid the first door your miner runs through (see, this is why we use doors), which should be the door closest to the water source. Don't bother forbidding the other two. Link all three doors to three separate [[lever|levers]] and test the system. Close the door between the filling chamber and main farm area and open the door that leads to the water source. When the filling chamber is full, close the door to the water source, close the door leading to the farm, and open the door between the [[farm]] and filling chamber. The water should spread out and coat the entire farm in a thin layer of water. At this time, plant your farms and begin the wait until they yield products. | When you do breach the water source, immediately forbid the first door your miner runs through (see, this is why we use doors), which should be the door closest to the water source. Don't bother forbidding the other two. Link all three doors to three separate [[lever|levers]] and test the system. Close the door between the filling chamber and main farm area and open the door that leads to the water source. When the filling chamber is full, close the door to the water source, close the door leading to the farm, and open the door between the [[farm]] and filling chamber. The water should spread out and coat the entire farm in a thin layer of water. At this time, plant your farms and begin the wait until they yield products. | ||
− | == | + | == Pond irrigation == |
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+ | Dig a farm room, and dig a channel one Z-level above it, creating a hole down into the farm room. Create a [[zone]] on the hole, and make it a pond. Your dwarves will attempt to fill it with water carried in buckets. As they dump water in, it will muddy the farm room floor. After it has been sufficiently muddied, disable or remove the pond zone until you need to irrigate it again. Dwarves can build farm plots in 1 unit deep water. | ||
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+ | NOTE: Even though it works, this is probably the slowest way to irrigate a room since dwarves only carry 1 unit of water per trip. Especially if you don't have a more than one or two idle dwarves and buckets, or if the water source is far away. It also probably wouldn't work very well on larger farm areas. | ||
− | NOTE: | + | NOTE: Digging a channel from the surface will mark the tile below Outside. This means that cave plants will not grow there. |
− | + | == Pump Irrigation == | |
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− | + | If you have access to [[wood]], [[stone]] floors can be irrigated conveniently from a water source on the level below, by use of a [[screw pump]]. Simply dig a channel to access the water on z-1, install a [[Screw Pump]] and set to Start Pump Manually ({{k|Enter}}). Any dwarf with the 'Pump Operating' duty active will quickly pump enough water to irrigate a large area (so rapidly that irrigating other rooms becomes a concern!). This can be improved by installing a second pump to draw water out of the room, allowing you to rapidly drain the room in the event of over-filling. | |
− | + | == Wave irrigation == | |
− | + | Although seawater is unfit for carrying to your farm in a bucket, areas muddied by seawater seem to be farmable. My favorite method of achieving this is building a farm room under a beach and making a hole in its roof, closable with a hatch, to let waves in. Also pumping water seems to desalinate it, so pumping it to your farming room seems to work fine. | |
− | + | [[Category:Agriculture]] |