Water and erosion

Hi.

Im currently trying to update my terrain engine to use water flow and erosion simulation in realtime.

I found this exelent example of it here:

http://codeflow.org/entries/2011/nov/10/webgl-gpu-landscaping-and-erosion/

However I cant seme to recreate it in unity 3D. The description is a bit confusing. I have tried everything but cant get it to work.

The source code is a bit confusing as well so I have had no luck with that either.

Could someone who might understand be kind to help me figure out the algoritm or explain it?