Shoreline Processes And Features 16 3 Vocab Ppt

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  • 1. Shoreline Processes and Features
    16-3
  • 2. Beach
    A beach is the accumulation of sediment found along the shore of a lake or ocean.
    Beaches and shorelines are constantly undergoing changes as the force of waves and currents act on them.
  • 3. Wave Refraction
    Wave refraction is the bending of waves and it plays an important part in shoreline processes. It affects the distribution of energy along the shore.
  • 4. Long shore Currents
    The current that flows parallel to the shore and moves large amounts of sediments along the shore is known as long shore currents.
  • 5. Barrier Islands
    Barrier islands are narrow sand bars parallel to, but separated from, the coast.
  • 6. Forces Acting on the Shoreline
    Waves along the shoreline are constantly eroding, transporting, and depositing sediment. Many types of shoreline features can result from this activity.
  • 7. Wave Refraction
    Because of refraction, wave energy is concentrated against the sides and ends of headlands that project into the water, whereas wave action is weakened in bays.
  • 8. Longshore transport
    Turbulence allows longshore currents to easily move the fine suspended sand and to roll larger sand and gravel particles along the bottom.
  • 9. Erosional Features
    Shoreline features that originate primarily from the work of erosion are called erosional features. Sediment that is transported along the shore and deposited in areas where energy is low produce depositional features.
  • 10. Protective Structures
    Groins, backwaters, and seawalls are some structures built to protect a coast from erosion or to prevent the movement of sand along a beach.
    groin
    backwaters
    seawalls
  • 11. Beach Nourishment
    Beach nourishment in the addition of large quantities of sand to the beach system.