Man Made Lakes

[Captain Pronin]

I've created a manmade lake in my city by pumping ocean water into a shallow area on top of a mountain. I use outlet pipes to pour the water in, but im not sure how to regulate the height of the water (As i need to pump water in to make sure it doesnt dry out). Is there some mod I need to do this or can it be done with vanilla buildings?

[Longhaul]

http://steamcommunity.com/sharedfiles/filedetails/?id=502750307&searchtext=landscape

Extra Landscape tools. Lets you modify all aspects of terrain.. make a lake and drop in a water source, you can adjust the level.

[mbutton15]

Extra Landscape tools is a great little mod. And by using the water source you also won't have to pump water from the sea.
One little word of caution, adjust the strength setting so it's only around 50% (maybe even lower). Sometimes when the strength is higher it can cause flood water. And to help prevent that reaching your city you might want to make some temporary canals and flood walls.

[bradybrklyn]

You can also use the vanilla landscaping tool to dig a hole for your lake and use the fresh water outlet to fill it. You need to turn it on and off to keep your lake at the desired level. The Extra Landscape tools are easier, but if you don't want to use a mod, this is the way to do it.

[sindar]

Why bother about pumps and water outlets and tedious monitoring of the fill level?
If you place a water source in your created lake and adjust your desired water capactiy and hight level it will automatically fill and sustain that level.
There are several tutorials on YouTube, i.e.
Skibitth's Cities Skylines Tutorial - How to make a Pond or
Mr. Miyagi's Cities Skylines Making a Lake - Quick walkthrough .
And this rather long one by Skye Storme may help understand water dynamics in CS: Cities: Skylines Building London - The Map #4 ►Water Dynamics◀ Gameplay/Tutorial .

[War_Machine1]

SOLUTION NO MODS REQUIRED ( Click for image [i.imgur.com])

https://i.imgur.com/N6DDieZ.png

I was running into the same issue when trying to create man-made lakes near fire brigade helicopter depots (yes, I'm abusing the helicopter priority policy, traffic caused a high school to burn down next to a fire house).

Use the volumetric water to your advantage by creating a deep lake with a fresh water outlet, then create a shallower lake next to it with a wall at the water level you wish to maintain. This will cause the deep lake to fill until it spills over into the shallow lake. Then add a water pumping station to the shallow lake. This will ensure the shallow lake stays near empty so there's always a place for the deep lake to drain to before it overflows and floods your city. Enjoy!