Mr. Chair, I'll begin, and Mr. Bernier can supplement what I say, should there be any further information to add.
Yes, we're observing those kinds of changes. Earlier Ms. Lagarde mentioned an earth-water continuum, but there also has to be a continuum along the shorelines. There has to be sediment transport along the shorelines. Infrastructure sometimes prevents sediment from being transported that way, which, in some instances, causes erosion downstream from those structures. The phenomenon is known and documented.
Furthermore, I can say that infrastructure is sometimes damaged in spots, which also triggers other geomorphological processes that cause erosion. For example, you can see those processes at work undermining structures. In some instances, when water levels are high, erosion occurs under the infrastructure, combined with ice. A host of phenomena occur and can interfere.