Lesson 6 - Longshore drift Flashcards
1
Q
transportation of material along the coastline takes place in the following ways:
A
saltation traction solution suspension LSD
2
Q
what is saltation?
A
material is bounced along the beach
3
Q
what is traction?
A
rocks are rolled along the seabed?
4
Q
what is solution?
A
dissolved material is transported
5
Q
what is suspension?
A
material is carried along by moving water
6
Q
What is longshore drift?
A
- occurs when waves approach beach at an angle
- material is pushed onto the shore in the seas swash in the direction of the dominant wind
- material is then brought back down to sea at a 90 degree angle under the influence of gravity
- this is the zig zag effect
7
Q
what are the 4 categories of coastal management?
A
do nothing
hold the line
managed retreat
advanced the line
8
Q
how do humans contribute to coastal erosion?
A
walking on the land
building on the land
