coastal fieldwork Flashcards

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1
Q

Primary data

A

Your information collected through your fieldwork e.g. measuring something.

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2
Q

Secondary data

A

Information that someone else has collected; a source that you are referencing to. E.g. an old sketch of a beach profile

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3
Q

Qualitative

A
  • Data that contains no numbers. E.g. photos
  • The data that looks for trends and patterns
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4
Q

Quantative data

A
  • Numerical data associated with measurements.
  • Data used to find direct relationships e.g. scatter graphs.
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5
Q

Random sampling

A
  • When you use a random number generator to choose sample sites to study beach profile.
  • Reduces bias, so increases reliability
  • However, the results may be very narrow or where data is difficult/unsafe to measure.
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6
Q

Systematic sampling

A
  • Choosing your sampling sites at specific and normally have equal intervals. e.g. plotting data every 10m when investigating the gradient of the beach.
  • You get a very wide range of results as you measure the entire area.
  • However, the sites might be suboptimal to measure.
  • Can skip important/key areas.
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7
Q

Stratified sampling

A
  • Uses pre-existing knowledge
  • You can choose the safest, most relevant sites by following the custom.
  • However the results are bias, not very reliable.
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8
Q

Hypothesis: Longshore drift is travelling from West to East along the Cromer coastline.

A
  • Sampling Method used: Systematic-record results every 10m.
  • Measure the LHS and RHS of the groyne to see if the sediment has built up on one side of the gryone or the other.
  • Equipment: 50metre tape measure and metre stick.
  • This shows the effectiveness of the groyne holding the material and not letting it being affected by the longshore drift.
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9
Q

Hypothesis: (Beach profile) The pebble section of the beach has a higher profile than the sandy section

A

Method used: Systematic-collect data every 7m.
* Equipment: 50 metre tape measure, 2 ranging poles and a clinometer.
* This investigation was carried out in summer- more constructive waves, so less erosion at the end of the beach because inadequate power by the waves.

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10
Q

Hypothesis: The size of the sediment on Cromer beach gets larger and rounder towards the top of the beach, near the cliff.

A

Method used: Systematic- record data every 5m
Equipment- 50 metres tape measure, vernier calipers and a quadrat.
* The size of the sediment increased towards the cliff
* But the roundness decreased towards cliff due to lack of erosion and reach of the waves.

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