Topic 9 - Coastal Fieldwork Flashcards
1
Q
what is longshore drift
A
the movement of sediments along a coast by waves that approach at an angle to the shore but then the swash recedes directly away from it
2
Q
what is prevailing wind
A
winds that blow from a single direction over a specific area of the Earth
3
Q
what is a groyne
A
- hard engineering
- reduce the rate of transport of sediment by longshore drift
- trap sediment to build up the beach and extend its width
4
Q
where were we studying longshore drift
A
- Blyth beach
- 4km long
- sea wall
5
Q
how can you present your data and information
A
- table
- photographs
- measuring (Groyne depth, beach width, beach profile, groyne profile, waves and longshore drift)
6
Q
how do we measure the gradient of the beach from the dunes/sea wall to the water line
A
- Lay the tape measure out
- Use the clinometer
- Divide the width of the beach by 10
- Take measurements at 10 equally spaced intervals
- Start at the sea
- Record the height difference in degrees
7
Q
how do we measure the gradient of the beach from the dunes/sea wall to the water line
A
- Lay the tape measure out
- Use the clinometer
- Take measurements at 5m intervals
- Record the height difference in degrees
- Measure 30m north and 30m south of the groyne
- Measure at the top of the beach and at the midpoint
8
Q
how could you present groyne depth
A
bar chart
9
Q
how could you present beach width
A
bar chart
10
Q
conclusion for fieldwork
A
- the north side of the beach has a smaller height from the top of the groyne to the sand
- the south has a smaller width of beach
