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Editing Aquifer
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− | {{Quality| | + | {{Quality|Masterwork|15:04, 18 May 2015 (UTC)}} |
{{av}} | {{av}} | ||
− | [[File: | + | [[File:aqua_varied.png|thumb|right|158px|Area with a varied aquifer.]] |
− | An '''aquifer''' is a subterranean [[Stone layers|body of rock]] that holds groundwater. Once exposed it will start leaking [[water]], which can lead to a lot of [[Fun]] [[flood]]ing if left unmanaged. | + | An '''aquifer''' is a subterranean [[Stone layers|body of rock]] that holds groundwater. Once exposed it will start leaking [[water]], which can lead to a lot of [[Fun]] [[flood]]ing if left unmanaged. There are two types of aquifers: '''light aquifer''' and '''heavy aquifer''', with light aquifers being by far the most common, slower to produce water and easier to manage. |
− | Aquifer tiles produce water in any ''neighboring'' open tiles | + | Aquifer tiles produce water in any ''neighboring'' open tiles -- north, south, east, west, and below - not in the tile above them, nor in any diagonally-adjacent tiles. Aquifers cannot be drained; the groundwater is limitless, with even a single isolated tile leaking water forever. However, [[smoothing|smoothed]], mined, carved staircase, or channeled aquifer tiles no longer produce water. Aquifers located in [[ocean]] [[biome]]s will produce salty water; aquifers in other biomes will produce freshwater. The frequency of aquifers differs between embark locations. |
− | If you are digging an up/down staircase in the downward direction and you hit an aquifer, the aquifer tile will be revealed as [[damp stone|damp soil]] or stone and the digging job will be un-designated for that tile. If you are mining horizontally, you will similarly be warned of "damp stone" before breaching the aquifer. If you are digging an up/down staircase in the ''upward'' direction, or a ramp, and you hit an aquifer from below, the aquifer tile will immediately start producing water in the stairwell. | + | If you are digging an up/down staircase in the downward direction and you hit an aquifer, the aquifer tile will be revealed as [[damp stone|damp soil]] or stone and the digging job will be un-designated for that tile. If you are mining horizontally, you will similarly be warned of a "damp stone" before breaching the aquifer. If you are digging an up/down staircase in the ''upward'' direction, or a ramp, and you hit an aquifer from below, the aquifer tile will immediately start producing water in the stairwell. |
== Types of aquifers == | == Types of aquifers == | ||
− | [[File: | + | [[File:aquifier_preview.png|thumb|300px|right|"This is what the in-game prompts were warning us about!"<br><small>''Photographed by Michael Behrens''</small>]] |
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=== Light aquifers === | === Light aquifers === | ||
Light aquifers are by far the most common (being ~19 out of every 20 aquifers), and produce water at a greatly diminished rate. As a result, they can easily be penetrated with minimal effort by digging out one level at a time and walling it off reasonably quickly. Light aquifers can be very useful for low-water applications such as slowly filling a cistern for wells, or feeding an atmospheric waterfall. | Light aquifers are by far the most common (being ~19 out of every 20 aquifers), and produce water at a greatly diminished rate. As a result, they can easily be penetrated with minimal effort by digging out one level at a time and walling it off reasonably quickly. Light aquifers can be very useful for low-water applications such as slowly filling a cistern for wells, or feeding an atmospheric waterfall. | ||
− | An open tile will receive water from a light aquifer only if it is directly '''north of, south of, east of, west of, or below''' a tile of the aquifer | + | An open tile will receive water from a light aquifer only if it is directly '''north of, south of, east of, west of, or below''' a tile of the aquifer. |
The amount of water that the open tile receives is random, on average four per month, possibly reaching as low as two or as high as six. The same amount of water is received regardless of the number of adjacent aquifer tiles. | The amount of water that the open tile receives is random, on average four per month, possibly reaching as low as two or as high as six. The same amount of water is received regardless of the number of adjacent aquifer tiles. | ||
− | + | If you wish to excavate a large area within a light aquifer without painstakingly and continually walling it off, dig regular drains to an open area in a non-aquifer layer where the water can evaporate more quickly than it arrives. | |
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− | If you wish to excavate a large area within a light aquifer without painstakingly and continually walling it off, dig regular drains to an open area in a non-aquifer layer where the water can evaporate more quickly than it arrives | ||
Unlike heavy aquifers, light aquifer tiles do not drain away water. | Unlike heavy aquifers, light aquifer tiles do not drain away water. | ||
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Empirically, heavy aquifers gain approximately 1/7 water every 14 ticks, though production has been observed to vary from 2-28 ticks. This rate does not appear to change significantly based on the number of adjacent aquifer tiles. | Empirically, heavy aquifers gain approximately 1/7 water every 14 ticks, though production has been observed to vary from 2-28 ticks. This rate does not appear to change significantly based on the number of adjacent aquifer tiles. | ||
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+ | === Varied aquifers === | ||
+ | In addition to the heavy and light types of aquifer, DF can also display "Varied aquifer" on the pre-embark screen, which means there are some tiles with light and some tiles with heavy aquifers in the embark rectangle (also note that the biomes of neighboring tiles can "spill over" into a tile, resulting in different, unannounced aquifers in those parts). | ||
== Where they are found == | == Where they are found == | ||
− | Aquifers appear based on the elevation of the terrain. Low elevations - particularly those near rivers and oceans - are more prone to having an aquifer present, while locations closer to mountains are much less likely, but still possible | + | Aquifers appear based on the elevation of the terrain. Low elevations - particularly those near rivers and oceans - are more prone to having an aquifer present, while locations closer to mountains are much less likely, but still possible. |
Layers which '''can''' contain aquifers: | Layers which '''can''' contain aquifers: | ||
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For every new world you make: | For every new world you make: | ||
− | “THE FOLDER DF IS INSTALLED IN” | + | “THE FOLDER DF IS INSTALLED IN”/raw/objects |
For worlds that have already been made: | For worlds that have already been made: |