Waves (Constructive And Destructive) Flashcards
(10 cards)
What is a constructive wave?
A constructive wave is a low, long wave with a strong swash and weak backwash that deposits material onto the shore, building up beaches.
When does a constructive wave usually happen?
In calm weather.
What is the frequency of a constructive wave?
Constructive waves have a low frequency, typically around 6–8 waves per minute.
What kind of swash and backwash do constructive waves have?
Strong swash and weak backwash, leading to material being pushed onto the shore.
What does a constructive waves make the beach look like?
They , build up beaches, creating a wider, flatter, and gently sloping profile on the beach.
What is a destructive wave?
A destructive wave is a high, steep wave that erodes the coastline by removing material.
What kind of swash and backwash do destructive waves have?
Destructive waves have a strong backwash and a weak swash, which pulls material away from the shore and causes coastal erosion.
When does a destructive wave usually happen?
It usually occurs during stormy weather.
What is the frequency of destructive waves?
Destructive waves have a high frequency, typically 10–14 waves per minute.
What does a destructive wave make the beach look like?
This results the beach being steeper, and having a narrower beach profile with exposed pebbles and rocks. The beach appears more rugged as the sand is carried offshore.
