Other studies have been done on the subject, of course. I'm thinking in particular of a study conducted by some of my colleagues on the Rideau Canal in Ottawa. A number of studies have mentioned this: The closer a boat gets to shore, the greater the impact on the shore. The studies don't exactly agree on a number, because environments differ and types of boats are not exactly the same. A variable impact is observed, but it is certainly something that stands out in a number of studies.
