Newbie looking for river

I’m trying to run a river over a map I’m working on however I can’t find any good tutorial on how to run a river trough a hill landscape. Does anybody know a good place to start?

This is what I’m looking for:

Generate water grafics

  • running water
  • water running over diffrent heights (down a hill)
  • Still water lakes ext.

So far I have little idea where to even start. So anyone who can help me?

Here i found something that could interest you :

This guy use UDK ENGINE to recreate a waterfall from wind waker and explain the process to do it. I don’t test it by my own but take a look and try to understand what he did.