I live in Baton Rouge.  We have a lot of coastal erosion here in Louisiana, and people want to attribute it to climate change.  However it is actually because of the river.  Normally a river will change course from time to time. Because of this the Mississippi deposits all of its sediment out at sea, where normally it would build up a delta.  The sea normally erodes the land here, but the land is replaced over time by the river.  Now that the river cannot move all that sediment cannot build the coast back up leading to a lot of coastal erosion.