When the wind blows over the sea, it creates waves. The size and energy of the wave depends on certain factors:
There are two different types of wave - constructive and destructive. They can affect the coastline in different ways. When a wave reaches the shore, the water that rushes up the beach is known as the swash. The water that flows back towards the sea is known as the backwash. The energy of the swash and backwash determine the type of wave.
The characteristics of a destructive wave are:
The characteristics of a constructive wave are: