There are many good ...

There are many good consultants in this area, but as below best to start with identifying point and non-point sources for pollution into the river. Then a combination of bio-swails, floating wetlands that are anchored in the river, and constructed wetlands at the point sources would be part of an integrated solution. I would suggest Ron Lavigne at University of Massachusetts as one expert on constructed wetlands (newswet@aol.com); Rob Crook for floating wetlands in a river (crookkohler@bellsouth.net); and Jim Albertz for bio-swails layout and design along with hydrology (JAlbertz@qsemsolutions.com)