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Questions tagged [water]

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

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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
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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
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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
9 votes
6 answers
2k views

can a water cycle exist on a planet without oceans?

So there's a planet that is used as a farming world (food) for its system. This planet has a single, Mediterranean sea-sized ocean on it and lacks any other major surface oceans (he hasn't excluded ...
ses's user avatar
  • 93
6 votes
8 answers
799 views

Can a city in a flood plain be maintained for centuries if it is built on stone blocks?

This question is part of a series that includes mosquito prevention and agriculture. The environment is a rain forest basin, similar in many ways to both the Amazon and the Congo. There is a mighty ...
kingledion's user avatar
  • 85.5k
5 votes
7 answers
2k views

Getting large amounts of water to the Australian outback

I want to build a city in the desert outback. It needs drinkable water for its citizens, what's a few different ways to get it? (pipes from coastal areas, desalination of salt lakes, etc) What are ...
mateos's user avatar
  • 1,578
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
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
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
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
9 votes
3 answers
895 views

If Earth Were Forged by Fire and Ice

Our Earth first came into existence 4,543,000,000 years ago as an inhospitable ball of molten rock that barely survived a crash from a Mars-sized rogue planet whose impact gave rise to the creation of ...
JohnWDailey's user avatar
  • 14.5k
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
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
30 votes
6 answers
56k 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
  • 2,346
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
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
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
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
  • 5,151
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
9 votes
4 answers
618 views

Water planet turns into desert world without being rendered uninhabitable

A habitable (human could survive in its atmosphere without suits) desert planet which used to have large oceans is quite common in ScFi. I was thinking about the processes which could have been ...
TheDyingOfLight's user avatar
8 votes
3 answers
900 views

Could humans survive on a planet with only deuterium 'heavy water' made with hydrogen isotopes?

If all the fresh water were at least 25% deuterium, would humans be able to survive? Would there be significant other detrimental side effects to human physiology as a result?
Melly Millions's user avatar
8 votes
4 answers
666 views

City on a Cloud - how to build an effective water supply?

The Utopians are a wise and benevolent civilization with Ancient Rome-like technology. Unfortunately, they are so peaceful that they are constantly on the verge of being conquered by the neighboring ...
Pedro Gabriel's user avatar
7 votes
1 answer
210 views

Ecological implications of osmotic portals

Suppose some magical civilization on Earth-like planet can create portals. Any given portal entrances are spherical surfaces of the same radius. Any particle enters one sphere and exits another in the ...
Мікалас Кaрыбутоў's user avatar
7 votes
4 answers
416 views

I'm going to have to redraw most of my rivers - what do I need to know to make them true to life?

I'm new here but I've been a worldbuilder for the last decade or so. I'm pretty late to the 'mapping out your country' party and I've only been at it for about 8 months, but I'm starting to see some ...
Andrew's user avatar
  • 153
7 votes
1 answer
724 views

Massive tides and resources

Assuming a situation similar to this, where the moon causes slower but massive tides that slowly encircle the globe. Would the poles be constantly underwater or not underwater (like A or B below)?: ...
depperm's user avatar
  • 1,248
6 votes
5 answers
341 views

How can I make a technologically correct horizontal watermill clock?

Context As I was working on some mechanical ideas (and practicing art), I wanted to see how to render time in creative ways. So I decided to make an horizontal watermill akin to a turbine, which has ...
Tortliena - inactive's user avatar
6 votes
4 answers
526 views

Is waterwalking possible?

I am working on a world situated on the Earth. There is normal gravity, normal conditions of living - normal everything, except the human population itself. The situation: Humanity as a species ...
Ernedar's user avatar
  • 273
6 votes
4 answers
1k views

How quickly would an inch per hour of rain flood an enclosed 2x2 mile area?

In my setting, an apocalyptic supernatural event made the earth into a gridded globe of "squares" (more like columns) that are roughly 2x2 miles at sea level, getting larger going up and ...
Simon Price's user avatar
  • 5,151
6 votes
2 answers
1k views

Problems with turning a brackish endoheric lake into freshwater by artificially making an outflow?

A nation wants to utilize a large, currently brackish & endoheric body of water for irrigation & drinking. Damming the rivers & moving the water from there isn't considered viable for the ...
OT-64 SKOT's user avatar
  • 4,626
5 votes
3 answers
430 views

Is a world where all the water is "heavy water" possible?

I recently discovered that there is another kind of water : heavy water. Heavy water is made of deuterium, a heavier isotope of hydrogen. Heavy water itself is 11% percent heavier than "normal&...
faddllz's user avatar
  • 1,832
5 votes
1 answer
423 views

Tidal lock on a water moon

Tidally locking a rock or metal moon isn't too hard and the understanding of how a solid moon behaves while tidally locked is relatively well understood. However, can a water moon be tidally locked or ...
Green's user avatar
  • 52.8k
5 votes
3 answers
1k views

Surface temperature of a icy rogue planet

A certain imaginary stellar system had once a water world. But instead of evaporating away under the stellar wind, this lucky (or unlucky?) water world (made of only water and a gaseous atmosphere) ...
Jorge Aldo's user avatar
  • 5,862
5 votes
5 answers
108k views

Breaking surface tension of water to survive high fall [closed]

I'm writing a sci-fi story where a character has to jump off the top of a 140m (459ft) tall building, and fall into the sea. I think it's pretty obvious that no one could survive such a fall, so my ...
R Los's user avatar
  • 153
5 votes
4 answers
854 views

Water supply on an mountain fortress

I'm envisioning a city-fortress, existing on a plateau atop of a mountain in an island not very far from the coast. I'm trying to figure out how that fortress could have a constant fresh water supply. ...
Pedro Gabriel's user avatar
4 votes
4 answers
292 views

What would an until-recently waterworld look like?

So, suppose a world that, for most of its biological history, was a water world, with minimal dry land. Starting from the Cambrian Explosion analogue, the world stays like this for roughly 460 million ...
Globin347's user avatar
  • 5,797
-2 votes
3 answers
173 views

How much of Mars is covered if 10 quadrillion tonnes of water fall on it?

The setting: In trying to terraform Mars quickly, I am imagining that Phobos, (the bigger of its two moons) holds ten-quadrillion tonnes of water ice beneath its stony regolith. I am further supposing ...
user98816's user avatar
  • 8,657
-5 votes
2 answers
5k views

Lake Makgadikgadi, 21st Century [closed]

First thing first, to get this out of the way, there are two potential sources of the faraway rivers in this scenario: Lakes Chad and Congo, the result of 30 million years of tropical heat, heavy ...
JohnWDailey's user avatar
  • 14.5k