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Questions tagged [water]

For questions that have to do with the liquid form of H2O.

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88 votes
13 answers
11k views

0g pool: can I keep a big ball of water in space?

I have a super luxury space hotel. It has artificial gravity in the living and shopping area and 0g in some parts of the recreational area. There is a 0g pool available for the guests. I want it to ...
SilverCookies's user avatar
73 votes
24 answers
18k views

What is the utilitarian purpose of artificial waterfalls?

In sci-fi and fantasy artwork, I often see a city built on top of or incorporating waterfalls: James Gurney's Dinotopia (above) is an egregious example with "waterfall towers". When the city is ...
wetcircuit's user avatar
  • 9,437
49 votes
19 answers
10k views

(How) can I provide reliable water sources in a world of flying islands?

I have humans who live in a world filled with floating islands. These islands span all heights in the planet: from the core to the upper atmosphere. The problem I have is that most of these islands ...
Miguel Bartelsman's user avatar
49 votes
13 answers
11k views

Pressure inside an infinite ocean?

Handwaving the origin of one such place, imagine a universe where every part of space is filled fully and evenly with liquid water (at, say 1 degree Celsius). What would be the experience of a solid ...
user289661's user avatar
  • 1,681
42 votes
31 answers
18k views

A way of getting the water to the top of the tall building without electricity?

First, let me explain the situation. Post-apocalypse setting, a group of humans (let's say around a hundred of them) have to find safe places to live at, protected from animals, bandits, and other ...
Bora's user avatar
  • 1,073
37 votes
15 answers
14k views

What methods might an ancient civilization use to desalinate sea water?

Following on from my previous question here concerning the ancient civilization I have called the Androy and their struggle to survive terrible drought conditions on their planet. After years of ...
Slarty's user avatar
  • 37.6k
33 votes
15 answers
10k views

Are 'tree waterfalls' possible?

Something like the above (Natural Springs by Ellie Cooper) - either where the water originates from atop the tree through regular rainfall, or is directed up and into the tree via the spring (or some ...
Vigilant's user avatar
  • 1,659
30 votes
6 answers
57k views

How would the world be different if ice was denser than water?

Ice is strange, in that the solid form is less dense than the liquid water it freezes from. This causes Ice to float on top of the water. How would our planet earth be different if something changed ...
Tim B's user avatar
  • 77.1k
28 votes
6 answers
9k views

How long could a person survive on nothing but water, salt, and sugar?

Magic System One of my worlds has a magic system that allows people to produce any element, as well as a small number of molecules. When something is produced using magic, it spawns into existence in ...
M S's user avatar
  • 2,366
27 votes
9 answers
8k views

Sailing without wind, but with strong currents

Context On my world, there is a lot of water: sea, oceans, ... There are also firm land and islands, so it's interesting to travel on the water. The problem is that there is NO wind at all, and lots ...
Legisey's user avatar
  • 4,554
27 votes
19 answers
10k views

Projectile weaponization of water

Is it possible to weaponize common tap water in some sort of gun? Imagine a basic water gun. It doesn't do much damage at all. But what if we could fire the water out in controlled spurts, at high ...
Aify's user avatar
  • 19k
26 votes
8 answers
3k views

How could a generation ship maintain a source of potable water?

A generation spaceship (a spaceship designed for multiple generations of humans to live in) could sail through the galaxy for hundreds of years before finding another planet, let alone a planet with ...
Terri M.'s user avatar
  • 643
25 votes
16 answers
6k views

How to make sure humans do not know the meteorological phenomenon rainbow?

You've got to love the rainbow, it's an awesome sight. But I don't want humans to have the pleasure of seeing the rainbow. What change to the earth, atmosphere and so on, is needed so that humans ...
Rolf ツ's user avatar
  • 1,185
25 votes
6 answers
8k views

Is it biologically plausible for a land animal to drink saltwater and not drink freshwater?

I'm trying to come up with a land animal that can drink saltwater but for some reason cannot drink freshwater. The advantage of drinking saltwater would be that they can get drinking water straight ...
ITM_Coder's user avatar
  • 1,371
25 votes
8 answers
5k views

How could a planet have most of its water in the atmosphere?

I am creating a speculative evolution project for school (and partially for leisure) and I need a planet for my organisms to live on. I have a rough idea of what it may be like but I'm no expert in ...
MintySweeTea's user avatar
  • 1,548
22 votes
5 answers
6k views

How could the rain fall slower?

I was thinking about people who once told me that I must feel the rain earlier than them (I'm tall). So I thought of a world where the rain falls so slowly that the humans of different size living on ...
Calaom's user avatar
  • 466
21 votes
8 answers
4k views

What happens to my candy-creatures when they get wet and how do I stop it?

Dilithoids or as I call them candy-creatures are the lowest animals on the food-chain on my arid alien planet. What distinguishes them from other alien fauna is their simple body plan and their ...
LiveInAmbeR's user avatar
  • 10.6k
21 votes
11 answers
3k views

How would a town powered mainly by water work?

I have a town that I'm designing (in a D&D campaign, think Neverwinter in terms of technology) that I want to be a town on a river/lake/ocean/whatever. I would like for this town to be unique from ...
upfish's user avatar
  • 725
20 votes
9 answers
8k views

All of the freshwater on Earth has suddenly vanished - would humanity survive? [closed]

Consider a scenario where all freshwater on Earth suddenly disappeared... Would the planet remain habitable? Definition of water removed: Everything in this chart under the category 'freshwater', ...
Austin A's user avatar
  • 1,098
20 votes
9 answers
6k views

How to stop a waterfall

My world - think 13th century medieval Europe - has a gigantic waterfall. Imagine Niagara Falls but even bigger, consuming multiple sides of a big mountain. People don't climb the mountain, as it is ...
durrrrina's user avatar
  • 261
19 votes
11 answers
1k views

How can I move a magical water-producing artifact?

An adventurer (named Moses, for humor's sake) finds a clear pool of water deep in a cave. Upon taking a swim, he finds at the bottom of the pool is a mystical stone that eternally puts out water, ...
Thane Brimhall's user avatar
19 votes
8 answers
5k views

What would realistically happen if you could water walk?

I like to add fantastical things and make them mundane. In this case, instead of building and maintaining a pedestrian bridge in a fantasy world they would create a waterwalking path. In this case, ...
Demigan's user avatar
  • 45.4k
19 votes
7 answers
4k views

What's the quickest way to add oceans to a planet?

After writing this question about the ecology of a terraformed planet, I realized that I hadn't quite tied up all the loose ends of the terraforming process itself. I intended for a group of aliens ...
HDE 226868's user avatar
  • 101k
19 votes
3 answers
4k views

Does water in vacuum form a solid shell or freeze solid?

I'm working on a sci-fi setting which includes an aquatic space-faring species. When a human space vessel is ruptured and depressurizes, the gas can escape rapidly and we immediately suffer from the ...
Marsh's user avatar
  • 1,952
19 votes
4 answers
1k views

Is it possible for a planet to have a liquid ring?

Is it possible for a planet to have a liquid ring rather than a ring made of solid particles? If it is, how long would it be stable for? If not, is there any other configuration of a liquid that ...
Slarty's user avatar
  • 37.6k
18 votes
10 answers
7k views

How could an organism store a massive amount of water?

I want to design a creature capable of surviving long periods without drinking water, but I am not sure how that creature could store water. These are my ideas but I am looking for something more ...
Ender Look's user avatar
  • 8,863
18 votes
3 answers
3k views

Closest Proximity of Oceans to Freshwater Springs

I am trying to wrap my head around the geography of a settlement in my world. The settlement is situated along the coast, along a river roughly 500m wide with temperate mixed forests surrounding it, ...
A Lambent Eye's user avatar
18 votes
6 answers
3k views

How long would it take before the water flowing out from an encased and flooded suburb is drinkable?

One of the early events in my story involves a 2x2 mile section of a suburban town that is encased in invisible walls 100 feet (30m) high and perpetually subjected to heavy rain at a rate of about an ...
Simon Price's user avatar
  • 5,161
18 votes
5 answers
4k views

Getting fresh water in the middle of hypersaline lake in the Bronze Age

An ancient kingdom covers a several rivers in a desert basin all converging on a central, hypersaline, lake. Because of its central location, and the importance of the salt, the lake has important ...
Maja Piechotka's user avatar
17 votes
8 answers
6k views

Feasible and rational way to give food and water to a prisoner?

There is a lord who is being kept prisoner in a castle tower by a griffin who has taken over his home, but requires the lord be kept alive for political value. Naturally this requires the griffin ...
Syphoenix's user avatar
  • 1,255
17 votes
11 answers
4k views

What could lead a large ocean on a planet's surface to recede completely only to reappear later on in a cyclical process?

I don't just mean tides or large-scale floods and droughts but a premise where one or more large bodies of water (or even every such body if that makes it easier) disappear, only to reappear one or ...
Qwokker's user avatar
  • 471
16 votes
13 answers
3k views

Logistics Problem With Water Creation Magic

There's a facet of my magic system that uses a certain kind of crystal to create water out of the magic energy stored within. But, I don't want to solve the entire world's water supply issues with ...
Inky's user avatar
  • 161
16 votes
7 answers
5k views

What could cause the world to be almost completely submerged in water, naturally or man-made?

I'm trying to build a world that is almost completely water, but I couldn't come up with an explanation for WHY the world was like this. The world has the same gravity and atmosphere of Earth. It also ...
SaneDragon's user avatar
16 votes
3 answers
3k views

A planet with all of its water underground

Question: Could a planet contain all of its (vast) oceans underground? I imagined a planet with no surface oceans - and no water cycle above ground - but where life was still possible. My initial ...
user38754's user avatar
  • 707
15 votes
9 answers
6k views

Would it be possible to make a water mill without metal?

I'm making a human society that has a lack of metal ore and no knowledge of metalworking at all. However, industry must still continue, metal or not, so I'm thinking about a water mill made out of ...
Joe P's user avatar
  • 1,570
15 votes
9 answers
3k views

Can a house cut off from the world still have water for a short time?

Related to this question a bit, the house I'm talking about was swallowed into another dimension along with parts of its garden. The house itself stays completely intact, but the piping is cut off, ...
user avatar
15 votes
8 answers
3k views

Tide without moons

I’m creating a planet which is relatively similar in size towards earth being slightly smaller. It’s covered in oceans and about only 17% of it is covered in land. The planet has no moons. I don’t ...
HomegrownPotatoes's user avatar
14 votes
11 answers
3k views

How to create tides in a small sea?

I've done a bit of research and small bodies of water don't have significant tides, even the Mediterranean doesn't have particularly large tides. So how can I get bigger tides on a small body of ...
adaliabooks's user avatar
  • 12.7k
13 votes
9 answers
8k views

Using a quarry as a water reservoir

Our country, which is located in thousands of km2 of plains, needs a way to store water. Dams are not an option due to the fact that there are no mountains. We have retired mining quarries that are ...
mateos's user avatar
  • 1,578
13 votes
11 answers
5k views

What rules can limit magical teleportation? [closed]

In my story, some people have the power of teleportation. I have constructed it in a way in which for teleportation to occur, it needs to be a water surface. All one needs to do is to see the ...
Askance_tortoise14's user avatar
13 votes
5 answers
3k views

Is it possible for an artesian basin to go underneath a shallow sea while still being freswater?

An artesian basin is an aquifer in which water within permeable rock is kept under pressure between 2 layers of impermeable rock. I don't know if any artesian basin exists like this in real life, but ...
OT-64 SKOT's user avatar
  • 4,626
13 votes
6 answers
2k views

Liquid water on both sides of a tidally locked planet. Feasible?

I'm brainstorming for a rocky planet with similar mass to that of Earth's, orbiting a red dwarf star. It is tidally locked with no natural satellites, yet I'm bent on having liquid water on both sun-...
kirani100's user avatar
  • 139
12 votes
5 answers
4k views

What effect could drop the freezing temperature of water globally to −40 Celsius?

This question comes up from Is there a man-made or natural event that can cause an abrupt climate change within hours/a day? – trying to get KaguraRap a functional answer to an abrupt temperature drop ...
Twelfth's user avatar
  • 24.3k
12 votes
7 answers
1k views

O'Neill/McKendree Looping River

Is there a way to design a river system in an O'Neill/McKendree-style cylindrical habitat to passively feed into itself in an endless loop, from one end of the habitat to the other and back again? ...
rek's user avatar
  • 13.1k
12 votes
1 answer
460 views

Would it be possible for a large inland area to have a groundwater system with cenotes, rather than rivers?

I want to create an inland forest on the western side of a large continent that features cenotes instead of rivers. Is this possible, and if so, how can I make it work? Any requirements for altitude ...
Peter Zach's user avatar
11 votes
10 answers
6k views

Is there enough fresh water in the world to eradicate the drinking water crisis?

Lets assume, by the means of some advanced scientific discovery, scientists find a way to teleport simple matter to any part of the world and use this process to teleport fresh water and/or small ...
Dhivya DD's user avatar
  • 167
11 votes
5 answers
2k views

What could trigger powerful quakes on icy world?

Imagine a planet orbiting a star some billions of lightyears away from us, the planet is 4 times the mass of Earth and is covered with ice 100km thick on average. It is believed that liquid ocean ...
user6760's user avatar
  • 48k
10 votes
16 answers
5k views

How to supply water to a coastal desert town with no rain and no freshwater aquifers?

Think Tatooine in climate, but with oceans. Here are a few restrictions due to setting: There is modern technology, but not too much electricity ie no super high amperage machines. Population is ...
Joe B's user avatar
  • 223
10 votes
7 answers
3k views

How efficient would pumping water uphill be using hydropower?

How efficient would hydropower be at pumping water upward? Waterwheels are the cornerstone of unmanned power and are basically gravity powered (solar too if you count the water cycle,) which is very ...
LiveInAmbeR's user avatar
  • 10.6k
10 votes
2 answers
2k views

How to build a floating farm?

This is one of a series of questions also discussing mosquito prevention and city building. There is a civilization indigenous to an area like the whitewater flooded forests of the southern half of ...
kingledion's user avatar
  • 85.5k

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