Levy and gate in Gangneung

I wrote earlier about the four rivers project and how I wasn't sure if it was a good thing or not.  I remain suspicious but look at this wall and flood gate in Gangneung

It has been raining for the past few days but the water is well below the level of this parking lot.  In the past, however, it has reached this high and the wall (is it a levy?  I think so.) and gate have been needed. Evening the flow of rivers might well be good for everyone, including the fish.