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Flashcards in Coasts Deck (28):
1

Swash

The movement of water up the beach.

2

Backswash

The movement of water down the beach.

3

Fetch

The distance that a wave travels

4

Long shore drift

The movement of material on the beach.

5

Bay

An indent in the land, usually between two headlands.

6

Headland

A piece of land that sticks out into the sea.

7

Prevailing wind

The wind direction.

8

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.

9

Wave cut notch

The notch created when the water eroded a cliff

10

Beach

Coast made out of eroded material transported there. This stops erosion in that area.

11

Spit

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

12

Coral reef

A line of coral polyp. Conditions are warm water(18 degrees), clear water, sunlight, water less than 60 m deep.

13

Salt marsh

An area where the water moves slowly, therefore deposits a lot of it’a load, these usually happen behind spits.

14

Destructive wave

Waves with weak swash and strong backswash

15

Constructive wave

Waves with strong swash and weak backswash

16

Cave

Hole in land, forms in headland from a crack because of erosion from sea

17

Arch

Forms in headland from a cave by the erosion of the sea. When the cave comes out the other aid of the headland.

18

Stack

Forms when the top part of an arch falls because of corrosion.

19

Stump

Formed when a stack is eroded by the sea, making it shorter.

20

Sand dune

Sand collects on and creates dunes. Grasses grow in them making them stable. The evolution of the dunes are: embryo fore yellow grey mature

21

Hard engineering

Hard structure made from concrete rock and wood man made.

22

Soft engineering

Natural defences that work with environment

23

Groyne

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.

24

Sea wall

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.

25

RIP rap

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.

26

Beach nourishment

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.

27

Mangroves

Coastal forests. They flood at high tide. They are a natural protection against storms and tsunamis. They are being destroyed for coastal development.

28

Long shore drift

Movement of material along the shore. The backwash is in the direction of the prevailing wind, therefor moves the material in that direction. The swash is perpendicular to the beach, therefore the material is moves in the direction of the prevailing wind.