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Questions tagged [rivers]

For questions about large streams of water (or other liquids) flowing in a channel to other bodies of water on planetary scales.

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7 votes
7 answers
3k views

A canal between two rivers

I'm working on a fantasy setting and I had thought about the possibility of connecting two natural rivers (that flow in different directions, one to the west and one to the east) using an artificial ...
J.E Megia's user avatar
4 votes
3 answers
203 views

What conditions would be required to create several deep creeks in the same area?

In my world, there's a forest that contains several creeks that resemble the Bolton Strid in Yorkshire. They look innocent enough and are only about 7 feet across at most, but they're hundreds of feet ...
OprenStein's user avatar
1 vote
3 answers
227 views

Is it possible for a moon to have a river flowing across one giant continent?

I’m creating a world where one giant supercontinent has a river flowing across it. The land is covered in lush forests and is surrounded by mountains. The world is orbiting a gaseous planet and is ...
Jocey's user avatar
  • 11
1 vote
1 answer
98 views

Fluvial systems: Are they necessary for human survival in domed cities on waterless planets

A world with a natural water cycle has rivers which generate a lot of transportation and ecological benefits. But gravity and sunlight drive those engines. An artificial domed community doesn’t have ...
Vogon Poet's user avatar
  • 8,179
0 votes
1 answer
95 views

If the Western Ghats of South India were substituted with the Himalayas and the Monsoon with El Nino, what would be the climate & biomes of the region [closed]

I am building a region which would be somewhere in the 20-30 degrees latitude range, similar to southern India, but I'd like the mountains to be taller, like say an eastern Appalachians at least and ...
Ravenquothe's user avatar
37 votes
12 answers
7k views

What characteristics does my deadly river need so people can't find the bodies of those who drown in it?

My story is set in a small Idaho town called Serpent's Yard, named after the cryptid they believe lives in the lake up in the mountains above the town. The town is built around a river, known as ...
Cyrus Drake's user avatar
  • 8,007
3 votes
4 answers
244 views

Any natural way that a River can "move" by hundreds of kilometers seasonally

I'm designing a Nomadic culture and I had an interesting concept. One of the reasons for nomadism is to find resources that "move" annually. In the case of pastoral nomads, it is to find new ...
spaceamoeba1010's user avatar
6 votes
2 answers
199 views

Where could a family live in seclusion and operate a mill year-round?

Where could this be? I'd like to have a small family (2 parents, 3-4 kids) living completely off-the-grid in some remote forest in the US. The story takes place in modern times. They have a well-...
nuggethead's user avatar
6 votes
1 answer
107 views

Evaporation Pans by Filling Lake Makgadikgdi with water from the Zambezi [closed]

I have Macro question, and have enquired and discussed this topic with numerous people. My background is more in Economics and Finance, but I have a small little plot in the Waterberg Limpopo (Pecan ...
Charl Yazbek's user avatar
8 votes
5 answers
4k views

Are the rivers in my fantasy map accurate?

Color legend: The brown shapes are hills, the darker the brown the higher the mountains and the highest peaks I've made white. They are mostly clustered on the east and west edges. The green shows ...
EmRy's user avatar
  • 81
6 votes
2 answers
510 views

Could a Massive Freshwater Lake and River System Exist in a Desert Environment?

In my book series, there is this lake called Lake Pheron. Lake Pheron's surface is located about 2,200 feet above sea level in a mostly flat, inland area called the Tangolian Desert. This desert is ...
The Weasel Sagas's user avatar
16 votes
14 answers
5k views

How to Supply a City on top of a Vertical Cliff?

In my fantasy series, there’s this city called Pharcos situated on top of nearly vertical 3,500ish foot high sandstone cliffs above the river it uses for water. This river, called the Clazelis, along ...
The Weasel Sagas's user avatar
9 votes
3 answers
2k views

Could a river civilization develop in a cold desert climate?

There seems to be a trend with the oldest civilizations (Civilizations being urbanized societies with a government and social heirarchy) starting around river valleys surrounded by desert; the ...
Tateran's user avatar
  • 93
6 votes
2 answers
211 views

Permantly Fog-Filled Canyon

I have a canyon, with similar size and shape to the Grand Canyon. The canyon is carved by a large river, similar to the Colorado river. I want this canyon to be filled with fog so thick that, if you ...
Firedestroyer's user avatar
3 votes
4 answers
252 views

are my rivers and map little realistic

This is my first world map so I just need to know if said rivers are realistically flowing from point to point. And if you have other tips those would be helpful as well. Rivers flow from the ...
Erik Sanchez's user avatar
3 votes
2 answers
106 views

What would the purgatorial lake be like?

The purgatorial lake in an artificial lake formed from the five rivers of heaven and hell. These rivers are: The syrup river of heaven, a river of golden syrup The seed river of heaven, a river of ...
Ichthys King's user avatar
  • 16.1k
3 votes
4 answers
2k views

Do rivers pass through a mountain range?

So I have just begun with world-building, and this is my first map. As you can see on the map, a small range of mountains splits from the main mountains. What I wish to have is a long river that goes ...
Momobear's user avatar
  • 201
4 votes
2 answers
377 views

Long-term, what does my magical 2x2 mile raining deathtrap do to the surrounding land?

Earlier I asked a few questions about one particular part of my setting, which is an Earth in the immediate aftermath of a supernatural apocalypse that made the world a gridded globe of 2x2 mile "...
Simon Price's user avatar
  • 5,151
7 votes
2 answers
315 views

Civilization in a giant Flood plain continent?

Basically, in my world, there is a continent bigger than the whole of Eurasia, it is extremely flat (a 50 meter hill would be considered an important landmark), and its whole surface is a flood plain. ...
Rhomaioi's user avatar
  • 1,331
3 votes
4 answers
1k views

Where would rivers and lakes make sense on this continent?

Fellow world-builders, I need some guidance. I've been drawing a map of the continent Anai'vora, the landmass where my current D&D Campaign takes place. I'm very new to world building, and this is ...
SirNocturne's user avatar
10 votes
4 answers
2k views

How to create a realistic river without knowing the whole map beforehand?

Intro I'm developing a real time game that have dynamically generated map and I'd like to add rivers going from mountains to the sea. Brief info about the map In my game, when a player moves to the ...
Prolog's user avatar
  • 203
6 votes
9 answers
2k views

Can a naturally occurring milk river exist?

Is it possible without magic? Just like our world's rivers, but instead it's a river made out of milk.
MinSin's user avatar
  • 143
3 votes
2 answers
404 views

Would this be a plausible coastline + river combo?

So, for an area of my world, I'm imagining three cities situated along the stretch of a river, running from a lake in the mountains onto relatively flat terrain (though still a bit above sea level) ...
devendoo's user avatar
  • 113
19 votes
4 answers
5k views

Could terrain like this form on Earth? If so, how?

I am creating an RPG and came across an image that I wanted to base my landscape on. It is shown above. Is it possible for terrain like that to form on Earth (ignore the wildlife)? If it is, how could ...
Galactic's user avatar
  • 4,464
2 votes
1 answer
179 views

Could a river be gravitating around a planet? [duplicate]

I am building a sort of space odyssey and I was wondering about something... In a DnD game I used to DM, Starfinder I believe it was called, there was this asteroids belt and in it was some sort of ...
Dustman0's user avatar
  • 107
3 votes
3 answers
406 views

Is a confluence of more than two rivers plausible?

Two rivers converging into one is obviously extremely common, most often when one is clearly dominant over the other (whereby the lesser one is the 'tributary' of the greater) but also sometimes where ...
Stephen's user avatar
  • 8,692
0 votes
4 answers
708 views

How significantly would the course of rivers change over 10,000 years?

This one is rather straightforward. A character falls into a magically-induced coma for about 10,000 years and then wakes up to find the world around him different in quite a few ways. There's not a ...
greenmaster's user avatar
13 votes
2 answers
1k views

What are the requirements for a river delta to form?

I know that when some rivers (such as the Nile) flow out to sea, they break up into several smaller channels. But I was wondering about the necessary features of the land and water for it to occur.
user64727's user avatar
  • 139
14 votes
13 answers
3k views

Rivers without rain

On Earth, rivers are possible because rain and snow deposit water in high places. That water then forms rivers when flowing to lower places. Would it be possible to have the phenomena of rivers ...
The Square-Cube Law's user avatar
17 votes
6 answers
7k views

What is the steepest gradient that a canal can be traversable without locks?

For a civilization that depends heavily on canals for transportation, what limits are there on how steep canals can before they flow too fast to traverse? I know that barges were normally pulled by ...
GiruŠatuku's user avatar
7 votes
7 answers
516 views

Salty or fresh or brackish waters?

So this is a small map of all the continents on the small planet of Parsas Decem. As far as most of the rivers go, I’ve got it figured out. What I’m wondering is, can salt water flowing in from the ...
Bett Struble's user avatar
8 votes
4 answers
827 views

How common is it for a river to enter a valley from a flatter plain?

before I get into my question I wanted to thank everyone for their input in my first thread about the general principles of river drawing. I have taken your comments under consideration and began ...
Andrew's user avatar
  • 153
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
18 votes
14 answers
6k views

Designing a river which does not overflow

... And if it absolutely has to, then such river should overflow in predictable matter. I have a city idea in mind, where such the city has a river contained in an artificial tunnel beneath such city....
Pavel Janicek's user avatar
6 votes
10 answers
1k views

Is it possible for a river to flow in a spiral pattern?

The question This question has a few parts: 1. Is it possible for a river to naturally form in the shape of a spiral? 2. If not, would an artificially-formed river, in the shape of a spiral, ...
JubaSuperman's user avatar
1 vote
1 answer
148 views

Volcano near river mouth

When a volcano is under the sea, but close to the coastline, it creates islands. I have a volcanic island near (less than 20km away) a river mouth. Is this feasible? I couldn't find any real example. ...
scrp's user avatar
  • 151
3 votes
2 answers
149 views

If a lake feeding a large river system was suddenly drained, how would it impact the area? [closed]

In my book series, there is a very small planet (slightly smaller than Earth's moon). This is called Planet Squid, and it has a climate and group of cultures very similar to those of sub-saharan ...
The Weasel Sagas's user avatar
8 votes
3 answers
544 views

Could a river on Earth be made of a liquid other than water?

So far as I can research, all rivers on Earth are flowing water. There are other substances that are liquid at room temperature. Are there any natural processes that could create a river of something ...
SRM's user avatar
  • 25.5k
24 votes
23 answers
5k views

Why would robots settle at a river?

In this settings, robots are a humanoid looking personal device that try to mimic the owners traits and behavior, even though they 'realize' they are not their owner, but rather a helping robot. The ...
Mixxiphoid's user avatar
1 vote
0 answers
110 views

Effect of source of river and its flow pattern on a budding civilization [closed]

Rivers can either be rain-fed or snow-fed. And most of the bigger civilizations of the past were located on the river banks. The climate of the region is temperate, but nearby there is a mountain ...
Elkosh's user avatar
  • 179
5 votes
3 answers
2k views

Drawing rivers on a continental scale map

I created the above map using Photoshop and used Wilbur to erode the terrain a bit and calculate possible river flows. Still needs work but I need to create a river mask before I can go on. My method ...
Akirus's user avatar
  • 173
6 votes
6 answers
4k views

Are the mountains and rivers on this map okay?

It's not finished yet, so it's still pretty empty. But I can't stop worrying about the rivers and mountains, so I ask for help. It's about 1100-1200 miles from north to south.
Paladin92's user avatar
  • 211
7 votes
4 answers
1k views

Would a "city on a bridge" be friendlier to the environment than a more typical city on land? [closed]

The "city on a bridge" that I'm envisioning has the entire population living their entire lives on a habitable bridge or a series of such bridges over major rivers, only going on land for recreation ...
Aporia's user avatar
  • 339
7 votes
1 answer
426 views

How could a mammal develop that has long legs but lives in a semi aquatic area?

This probably sounds fairly ridiculous- I know, but in short I've been developing a sort of future earth. It's not extraordinarily accurate, but I've been trying to at least keep the obvious in check. ...
CAGIG's user avatar
  • 73
20 votes
6 answers
9k views

Is my world map unrealistic?

Just to say this first, the map is intentionally on a slant, and so the Northern cold areas are displayed at more of a North-West Angle, for example. I am designing the world from scratch, and am ...
Teqa's user avatar
  • 343
37 votes
13 answers
9k views

How to stop a massive canal system from silting up?

Based on the desert world from this question I need to transport around 500 cubic kilometres of water / year across a desert. Using this calculator. this can be achieved if the main feeder canal is ...
Slarty's user avatar
  • 37.6k
2 votes
4 answers
679 views

Roughly how much water would my desert civilization need every year?

In my desert canal world all water is supplied from the poles to the temperate zones via a canal network. I want to work out the amount of water that that is needed, so that I can work out the ...
Slarty's user avatar
  • 37.6k
3 votes
4 answers
421 views

How fast a current can ancient water way travel overcome?

This question has similarities to this one but concerns canal travel in more ancient times and is aimed at finding an approximate speed of flow not variables. Background Assume an Earth-like world ...
Slarty's user avatar
  • 37.6k
0 votes
5 answers
529 views

Reason to not use boats when there is a is river [closed]

In my fantasy world, there is a massive river that flows through the heart of the empire. This river is used for obtaining potable water as well as feeding crops, however, boating is strictly ...
Unhappymarshmellow's user avatar
3 votes
2 answers
237 views

Argyria and Dwarven Industrial Runoff

The two stereotypes that I've seen the most about Dwarves are that they live in mountains and mine for precious metals and the like. Recently, I've been thinking of an interesting place to take that. ...
Lot-Of-Malarkey's user avatar