How to stop waves in rivers

[James™]

I am trying to create a map in cities skylines, but when I create a river, there are waves in it. How do I fix this.

[Slye_Fox]

Time.
The waves are just the fluid dynamics working, it will settle down given enough time.

[James]

don't make the riverbed flat.

[grapplehoeker]

It isn't about time and a flatbed would actually be advantageous.
The waves are usually due to too much of a gradient in the slope of the river, but can also be attributed to an imbalance of numbers and output capacities of water spawners.
So, first check the spawners and then examine the riverbed and narrowness of the channel. Try to keep the gradient level and smooth. Then you could try using more water spawners set at very low capacities all along the river length (0.1 for example), particularly in bottlenecks such as bends and narrows. These will not only stabilise the flow, but will also maintain the river surface level.
This episode from Skyestorme's excellent Building London series will show you how.
https://www.youtube.com/watch?v=4bZDEqXVMK8&list=PLbCLzFKeiWkOZsCe_PFWGCVYBkcHx6siD&index=4&t=1809s
Be wary of the placement of many water pumps and or sewage treatment plants. These add and remove water to and from the river. This means they can alter the capacities and in large numbers can create the wave effect. If you have to use the river as a water source, then make sure you spread the pumps out and avoid focusing them at any one point.

[Apop85]

Meh addidional water spawners isn't the way to go. It's a bit cheaty as they swallow waste water if the water level get raised above the spawners level. I prefer one source each river so the management of waste water don't get messed up for the player.

Any other suggestion how to avoid this waves without spendinng hours per river?

[SkiRich]

Originally posted by JamsKappa:

I am trying to create a map in cities skylines, but when I create a river, there are waves in it. How do I fix this.

Do you mean at the moment you carve the river, or after a long period of time you still see small waves like its an ocean?

[grapplehoeker]

Originally posted by Apop85:

Meh addidional water spawners isn't the way to go. It's a bit cheaty as they swallow waste water if the water level get raised above the spawners level. I prefer one source each river so the management of waste water don't get messed up for the player.

Any other suggestion how to avoid this waves without spendinng hours per river?

Gradient... it's all about gradient.
If you have wave formations on a downward sloping river, it's too steep.

[Stealthy]

It's 3-dimensional thing for fluid dynamics. So even if you gradient is correct, width of the river affects it as well. What you want is smooth lines in all directions, and ideally slightly expanding towards the sea.

[Alpine Womble]

I concur with Grapple. Too steep, if your river is wide, it doesnt matter that much, but with small ones (6 building units or less wide) you need to meander the bejessus out of them. Doesnt matter how smooth base bottom of the river is (using slope tool). Or put steps in your river (waterfalls).

I have been having the same issue. But the above appears to be a good solution.

[Apop85]

i've build a quite wide river but still zunamis ^^ and its not even steep

81 meters wide and growing while descending

while 18km long it descens about 250m ( ~0.8°)

http://steamcommunity.com/sharedfiles/filedetails/?id=1188386781

and yeah the rest of the terrain is missing as i remembered how awfull it is to create rivers i thought i do them first ^^

[James™]

Originally posted by SkiRich:

Originally posted by JamsKappa:

I am trying to create a map in cities skylines, but when I create a river, there are waves in it. How do I fix this.

Do you mean at the moment you carve the river, or after a long period of time you still see small waves like its an ocean?

Yes, long after I have created the river and placed the water sources, there are still waves.

[WizByte Games]

If your playing the Natual Disaster DLC you have to ask God for forgiveness. Your citizens have been very bad. ;) ;)

[SkiRich]

Originally posted by JamsKappa:

Originally posted by SkiRich:

Do you mean at the moment you carve the river, or after a long period of time you still see small waves like its an ocean?

Yes, long after I have created the river and placed the water sources, there are still waves.

I see. I assume you don't mean the regular waves that appear everywhere. That is the water texture in the map theme you use. There is no way to stop the waves that appear like ocean waves, even in the rivers. No still water is possible. Unless you change textures, but then all the water will take on that effect.

You mentioned you added a water source. So I assume the current waves are too large for your taste in that river. You can do two things. Shrink the water source output to 10% and/or lower the water source so it doesn't flood the river. Ideally if you want a calm river with a water source you need both a smaller water source and the source needs to be at or really close to the sea level or level of the other water it empties into.

If you cant figure it out, post a save game and let some folks take a stab at altering the source.