So here is a question, How does the water physics work?

1: There is clearly some sort of sailing mechanic and the devs at one point made reference to dikes, so does that mean they might be looking into a massive fluid handling system (Ex: Pumps and early lock-n-dam/channel) set-up?

2: Are we going to see a water system that slowly fills ships like with Atlas if they get a hole in the hull?

3: How will map/terrain changes effect rivers and what not?