TB: We agree on that. I have a tangential professional interest in these topics which has granted me a fair amount of training and exposure to stream morphology and rehab work. I believe it would benefit trout and rivers conservation if others were able to be exposed as well. The difficulty lies in making a technical field easily accessible to the enthusiast. Once you gain knowledge of these fields, you start to see rivers differently, more completely. But I still have a long way to go. Apologies to the OP for straying off topic.