Sections of Coast

• System


  A group of parts that work together as a whole- input, process, output
• Coast


  shorelinf that seperated thr land and the sea
• The littoral zone


  The wider coastal zone, including adjacent land areas, and shallow parts of the sea, just offshore
• Offshore zone


  Further out to the sea and is beyond the influence of waves.
• Nearshore


  Where the waves break
• Foreshore


  Between high water and low water marks, so sometimes covered in water, but sometimes exposed to the air
• Backshore


  Inland of the foreshore, usually above the influence of waves
• Coastal plains


  The land gradually slopes towards the sea across an area of deposited sediment
• Sediment cells


  Seven main coastal group, inside there are 11 sediment cells.

  The way the water moves, and where it carries the sediment
• Sediment budget


  the balance of sediment volume entering and exiting a particular section of the coast
• The coastal system


  Inputs:

  Waves, tides, salt spray, sun, precipitation

  Processes:

  Erosion, transportation, deposition

  Outputs:

  Beaches, sand dunes, spits, tombolo, headland, cliffs
• Sediment stores


  Beaches and sand dunes or sand and shingle in onshore or offshore bars.
• Concordant coastline


  In this type of coastline, the layers of rock are parallel to the direction of the coastline.

  Erosion also happens parallel to coastline e.g Lulworth Cove, Dorset
• Discordant coastline


  In this type of coastline, the layers of rock are perpendicular to the direction of the coastline.

  Erosion also happens perpendicular to the coastline e.g Pembrokeshire Coast
• Positive feedback


  Change that has a similar effect (keeps going)

  E.g beach starts to form, slows the waves, causes energy to lessen, so more deposition= larger beach
• Negative feedback


  Change that has an opposite effect

  E.g beach erodes cliff, the sediment that falls becomes a barrier and builds the beach up