What are the sources of sand for the beaches in Maine?
Rivers provide sediment to some beaches in Maine, but there are only a few large rivers (i.e., the Saco or the Kennebec), and must of the sediment that used to naturally flow down the rivers into the ocean has been trapped by numerous dams upstream. Most beaches are enclosed littoral cells and have a limited sediment supply available (reworked offshore material or material eroded from cliffs and bluffs).
