https://steamcommunity.com/sharedfiles/filedetails/?id=2755669887
I made a "starter" island base in a land-locked lake. I raised the ground as high as possible, but during more severe storms the waves will occasionally wash over it, but it's not very frequent. I have my house and workshop on a foundation built out of core wood that elevates them enough to avoid the water. I have a simple dock for a karve at water level and it definitely gets submerged.
It took literally thousands of stone to do, with a lot of back and forth trips, but for my first real attempt at this kind of terraforming, I'm happy with it.