I'm just going by what I've heard in other parts of the country. I know that on Prince Edward Island the representatives on the committee have made the comments before.
Wharves in P.E.I. have to have periodic dredging, because it's mostly sand in their facilities around there. Sand moves rather quickly through water as tidal currents increase and wind increases, and you get a big storm surge and so on. Storm surges are higher than they ever used to be around the areas, and therefore, you're getting more erosion around the beaches. As that happens, you get more sedimentation within the harbours.