Fieldwork (6) Coastal Flashcards

1
Q

Overall objective of fieldwork?

A

To investigate costs and benefits of different coastal management strategies within Start Bay

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2
Q

What were the 4 locations investigated? Which order did we visit them in?

A

Hallsands
Beesands
Sunnydale
Torcross

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3
Q

What sampling strategies were used during our investigation?

A

Stratified sampling - sites chosen after finding out what was at each location

Systematic sampling - beach profiles

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4
Q

How long were we there for and at what time of year?

A

5-6 hours, middle of May

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5
Q

Methods of defence at each location

A

Hallsands: rock armour
Beesands: sea wall and rock armour
Sunnydale: gabion baskets in front of houses
Torcross: large sea wall and rock armour

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6
Q

Whatbwere the 3 hypothesis’?

A
  1. Most cost effective coastal management located in…
  2. Risk of flooding and erosion highest in…
  3. Sea defences have a positive/negative environmental and social impact
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7
Q

What method(s) were used to determine where the most cost effective coastal defence is?

A

Bipolar survey of management methods
Cost-benefit analysis of defences

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8
Q

What method(s) were used to determine where the risk of flooding and erosion was highest?

A

Flood Risk Survey

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9
Q

What method(s) were used to determine whether sea defences have a positive/negative environmental and social impact?

A

Beach profiles
Lithology survey
Field sketch of Torcross

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10
Q

How was the Bipolar survey presented?

A

Radar diagram

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11
Q

How were the Beach profiles presented?

A

Line graph

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12
Q

Was most of the data quantitative or qualitative

A

Quantitative - eg. Bipolar survey, flood risk survey

Field sketch was qualitative

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13
Q

Examples of secondary data used

A

Cost-benefit analysis used actual prices of coastal defences
Zoopla used to estimate house prices
Average lifespan of defence
Lithology map

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14
Q

Describe the bipolar survey

A

Allowed us to evaluate coastal defences

Scored each coastal defence between -3 and 3 against a range of criteria

The higher the overall score, the better the coastal defence method

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15
Q

Describe the radar diagram

A

Used to present the bipolar survey results

Allowed us to add multiple scores for multiple criteria on one graph

Results for each location were overlayed to make for easy comparison

The larger the shape, the better the coastal defence method

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16
Q

Describe how the cost-benefit analysis was carried out

A

We counted the number of windows to decide whether properties were large or small

Calculated the value of properties at the location using values from Zoopla

Cost of defence calculated using the lifespan of the defence

Cost-benefit calculation: higher score = more cost-effective

17
Q

Name some disadvantages of the flood risk survey

A

Had to estimate distances from sea to buildings (not very accessible) - inaccurate

Height of buildings above sea level changes with the tide - not very accurate

18
Q

Describe how the flood risk survey was carried out

A

Used a tape measure to estimate the distance from the sea to the buildings

Had to estimate how high above sea level the buildings were

19
Q

Why was the lithology map useful?

A

Allowed us to see where sediment had come from

Allowed us to identify which processes are shaping the coastline

Helps us understand the possible influence of the coastal defences and whether they are suitable for each location

20
Q

How was the lithology survey (sediment sample) carried out?

A

Collected 10 rocks from the beach with our eyes closed

  • not representative of a large area
  • one type of rock likely to be prevalent in one single area
21
Q

How was beach profiling carried out?

A

Person A holds clinometer, Person B is other person

Person A holds clinometer near the sea whilst Person B stands at the closest point where the gradient changes

Takes reading of the gradient

Measure distance between points using tape measure

Repeat at next point of incline

22
Q

Disadvantages of the beach profile