coasts Flashcards
1
Q
what are the features of constructive waves
A
strong swash and weak backwash, low waves and far apart
2
Q
what are the features of destructive waves
A
strong backwash and weak swash, steep waves that are close
3
Q
what are the steps of longshore drift
A
the swash moves in an 45 angle and backwash goes in 90 due to gravity
4
Q
how are spits formed
A
longshore drift moves sediment and gap blocks movement. a long finger of sand moves and the end curves, creating a sandmarsh behind
5
Q
what are 3 hard methods of coastal management
A
groynes, beach norishment and sea walls
6
Q
what is a soft method of coastal management
A
managed retreat
