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Flashcards in Fieldwork Deck (22)
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1

Porlock location

- North Somerset
- west minehead

2

Advantages of secondary data

- quick
- cheap

3

Disadvantages of secondary data

- outdated or unreliable
- not specific to hypothesis

4

Natural processes at Porlock

- LSD
- drift aligned beach from west to east

5

What's secondary data was used

- satellite map
- geology map

6

What was the geology like at Porlock

- resistant sandstone formed a headland
- less resistant alluvium along coast

7

Porlock overall hypothesis

- the beach morphology will change from wets to east side of Porlock

8

Question 1

- will the beach area increase in size

9

1: results

- east side area bigger than west side

10

1: why is it unreliable

- ranging pole depth
- clinometer inconsistent
- subjective where slope changes

11

1: how to improve

- use same person to record results
- mark ranging pole depth
- record angle at smaller intervals

12

Question 2

- will the pebbles become more rounded and less angular

13

1: hypothesis

- beach profile will increase in area from west to east

14

2: hypothesis

- pebbles will become more rounded and less angular from west to east

15

2: why is it unreliable

- powers index subjective
- unable to random sample

16

2: how can it be improved

- random sampling
- reduce intervals

17

2: results

- 24 more rounded in east than west

18

Question 3

- will the pebbles decrease in size

19

3: method

- systematic sampling
- using calliper
- line graph shown to compare transects at east and west

20

3: why is it unreliable?

- not random sampling
- systematic not full representation

21

3: how can it be improved

- random sampling
- more frequent intervals

22

3: results

- T value 0.03
- critical value 2.68
- null hypothesis accepted
- no sig difference