Flashcards in Coasts Deck (28):
The movement of water up the beach.
The movement of water down the beach.
The distance that a wave travels
Long shore drift
The movement of material on the beach.
An indent in the land, usually between two headlands.
A piece of land that sticks out into the sea.
The wind direction.
Wave cut platform
When the sea eroded the cliff at a high tide and makes a notch, it the overhang eventually collapses, creating a wave cut platform.
Wave cut notch
The notch created when the water eroded a cliff
Coast made out of eroded material transported there. This stops erosion in that area.
Spit is a strip of deposited material created by longshore drift when it meets a river mouth. Salt marshes develop in sheltered area behind spit
A line of coral polyp. Conditions are warm water(18 degrees), clear water, sunlight, water less than 60 m deep.
An area where the water moves slowly, therefore deposits a lot of it’a load, these usually happen behind spits.
Waves with weak swash and strong backswash
Waves with strong swash and weak backswash
Hole in land, forms in headland from a crack because of erosion from sea
Forms in headland from a cave by the erosion of the sea. When the cave comes out the other aid of the headland.
Forms when the top part of an arch falls because of corrosion.
Formed when a stack is eroded by the sea, making it shorter.
Sand collects on and creates dunes. Grasses grow in them making them stable. The evolution of the dunes are: embryo fore yellow grey mature
Hard structure made from concrete rock and wood man made.
Natural defences that work with environment
A wall on a beach designed to stop longshore drift, they need to be replaced regularly, look ugly, and cause problems down the beach because there isn’t any material.
A wall parallel to the shore designed to absorb the energy of the sea in order to stop erosion. These are a long term solution but cost a lot, don’t look that good, and restrict access to the shore.
Large boulders placed at coasts in order to stop erosion of the cost, a cheaper solution than sea wall, but might have to be replaced sooner, and they look ugly.
Adding sand to a beach in order to make it bigger so it takes more energy from the sea. This is a type of soft engineering.
Coastal forests. They flood at high tide. They are a natural protection against storms and tsunamis. They are being destroyed for coastal development.