2B.4a Beach Ready Flashcards
How was Chesil beach formed?
It was formed by marine transgression (sea-level rise)
How high is Chesil beach?
15m high
What is Chesil beach exposed to?
It is exposed to the English Channel and North Atlantic Ocean
What type of swash do constructive waves have?
A strong uninterrupted swash
What type of waves constitute a destructive wave?
High height, short wavelength
What type of waves constitute a constructive wave?
Low height, long wavelength
What effect does percolation have on a shingle beach?
Shingle beaches lead to more percolation, so even less backwash and will lead to a steeper beach
What effect does percolation have on a sandy beach?
Sandy beaches lead to less percolation, so even a stronger backwash and will lead to more damage
What is a wave?
It is energy moving through water
How do waves move?
They move in a circular or elliptical orbit
What depends on the size of the waves?
Wind strength, wind duration, water depth, wave fetch, wave direction
How are waves formed?
Wind/water friction is the transfer of energy and it is the force of the wind blowing on the surface that creates the ripples
What effect does climate change have on a beach?
Climate change causes more storms to occur which brings about destructive waves and changes winter beach profiles
How are waves formed?
Starts at the seabed / shoreline, friction and water movement occurs, wave length decreases, wave height increases
How many constructive waves crash in a minute?
6-8 per minute
