Constructive and destructive waves

Destructive waves

The effects of a high wave

• Destructive waves are created in storm conditions.
• They are created from big, strong waves when the wind is powerful and has been blowing for a long time.
• They occur when wave energy is high and the wave has travelled over a long fetch.
• They tend to erode the coast.
• They have a stronger backwash than swash.
• They have a short wave length and are high and steep.

Constructive waves

The effects of a low wave

• They are created in calm weather and are less powerful than destructive waves.
• They break on the shore and deposit material, building up beaches.
• They have a swash that is stronger than the backwash.
• They have a long wavelength, and are low in height.