1
Q
Porlock location
A
- North Somerset
- west minehead
2
Q
Advantages of secondary data
A
- quick
- cheap
3
Q
Disadvantages of secondary data
A
- outdated or unreliable
- not specific to hypothesis
4
Q
Natural processes at Porlock
A
- LSD
- drift aligned beach from west to east
5
Q
What’s secondary data was used
A
- satellite map
- geology map
6
Q
What was the geology like at Porlock
A
- resistant sandstone formed a headland
- less resistant alluvium along coast
7
Q
Porlock overall hypothesis
A
- the beach morphology will change from wets to east side of Porlock
8
Q
Question 1
A
- will the beach area increase in size
9
Q
1: results
A
- east side area bigger than west side
10
Q
1: why is it unreliable
A
- ranging pole depth
- clinometer inconsistent
- subjective where slope changes
11
Q
1: how to improve
A
- use same person to record results
- mark ranging pole depth
- record angle at smaller intervals
12
Q
Question 2
A
- will the pebbles become more rounded and less angular
13
Q
1: hypothesis
A
- beach profile will increase in area from west to east
14
Q
2: hypothesis
A
- pebbles will become more rounded and less angular from west to east
15
Q
2: why is it unreliable
A
- powers index subjective
- unable to random sample
16
Q
2: how can it be improved
A
- random sampling
- reduce intervals
17
Q
2: results
A
- 24 more rounded in east than west
18
Q
Question 3
A
- will the pebbles decrease in size
19
Q
3: method
A
- systematic sampling
- using calliper
- line graph shown to compare transects at east and west
20
Q
3: why is it unreliable?
A
- not random sampling
- systematic not full representation
21
Q
3: how can it be improved
A
- random sampling
- more frequent intervals
22
Q
3: results
A
- T value 0.03
- critical value 2.68
- null hypothesis accepted
- no sig difference
Geog Physical AS
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