Questions tagged [water]

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

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9
votes
2answers
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 ...
8
votes
6answers
1k 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 ...
19
votes
4answers
823 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 ...
5
votes
8answers
611 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 ...
87
votes
13answers
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 ...
19
votes
7answers
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 ...
26
votes
19answers
9k 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 ...
16
votes
7answers
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 ...
10
votes
3answers
722 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 ...
68
votes
24answers
17k 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 ...
36
votes
15answers
11k 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 ...
41
votes
31answers
16k 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 ...
27
votes
9answers
7k 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 ...
26
votes
5answers
42k 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 ...
20
votes
9answers
5k 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 ...
12
votes
5answers
3k 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 ...
5
votes
4answers
541 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. ...
7
votes
1answer
649 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)?: ...
5
votes
5answers
68k 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 ...
5
votes
3answers
711 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) ...
-6
votes
2answers
2k 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 ...
6
votes
1answer
118 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 ...
6
votes
4answers
455 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 ...
6
votes
4answers
305 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 ...
5
votes
1answer
329 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 ...
5
votes
4answers
459 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 ...
5
votes
7answers
760 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 ...