GeNa - River Blending On Flat Terrain

[Konrad]

I was trying to create a little stream for my scene. But whatever settings, I cannot blend it well with my lake. Any tips on this?

[Bryan]

Here is a quick one that I made. 
You would want to make sure that the ground is lower than the river and always make sure that it's going downhill. 
Then you would want to adjust the Sea Level as this will determine the white foam end. 
Then in this situation in particular I would add rocks around it or vegetation to fill this and make it a bit more natural. 
Then you could add a waterfall-like effect here with rocks at the end to make this look nice. 

Here is an example that I made: