A beach or strand is an example of a depositional landform. A beach can be defined as a coastal zone of sediment shaped by the action of waves and longshore currents. This means that a beach is much longer then it appears to the naked eye. Beaches are constructed from sand and other material, which is derived from both local sources and distant ones. A beach can be divided into several different parts. The foreshore is the part that is alternately covered in water and during high tide and exposed during low tide. Seaward of the foreshore lies the nearshore which as always submerged, even during a low tide. One or more sand ridges running parallel to the beach known as longshores are formed and dispersed intermittently in the nearshore zone. Landward of the foreshore is the backshore, which extends from the highwater line to the dune line, and thus is never submerged.
No comments:
Post a Comment