Paper 3 - Fieldwork Flashcards
Physical enquiry question/hypothesis:
River meanders are faster and deeper on the outside bend
Human enquiry question/hypothesis:
The development of modern industry has had a positive impact on Canary Wharf
Wave count (coasts)/River velocity (rivers)
- gives an indication of the river/wave energy,
-whether erosion or deposition is occurring.
.
River velocity
can be measured by timing the journey of a float, or using a flow meter.
By counting the number of waves in a minute,
you can judge whether they are constructive or destructive (constructive = 6-8 per minute; less frequent
destructive = 10-14 per minute)
Wave count (coasts)/River velocity (rivers) - Strengths:
Provides quantitative data that is easy to present and analyse.
Can easily be repeated to provide an average.
Limitations:
Results vary greatly depending on weather conditions and/or time of year.
Measuring sediment size e.g. river load, beach sediment
done at spaced intervals along the river/coastline to assess changes.
- use a calliper to help measure accurately
Strengths: Measuring sediment size e.g. river load, beach sediment
Provides quantitative data that is easy to present and analyse.
Generally accurate (although angular rocks can be difficult to measure)
Limitations: Measuring sediment size e.g. river load, beach sediment
Relies on samples rather than measuring every piece of sediment. This can produce skewed/distorted results, especially if personal bias means some sediment is favoured over others (e.g. less muddy rocks!)
Channel survey/beach profile
This involves measuring the width and depth of the river channel or beach e.g. using measuring tape/metre ruler. This is typically done at several intervals along the river/coastline to assess changes.
Channel profile:
This can be used to test the theory that the river becomes deeper and wider along its course.
Beach profile:
A narrow, steep beach indicates erosion is taking place. A wide, flatter beach indicates deposition is more dominant.
A ‘clinometer’ is used to measure the angle of the beach. It can also be used to measure the gradient of valley sides.
Strengths:
Provides quantitative data that is easy to present and analyse.
Limitations:
You might only have the time to visit one site along the river/coastline, in which case you are unable to assess change.
Results might vary at different times of year. For example, in winter months, a beach will likely be more eroded due to stronger winds.
Strengths: Channel survey/beach profile
Provides quantitative data that is easy to present and analyse.
Limitations: Channel survey/beach profile
You might only have the time to visit one site along the river/coastline, in which case you are unable to assess change.
Results might vary at different times of year. For example, in winter months, a beach will likely be more eroded due to stronger winds
Species count e.g. using a Quadrat
This involves counting the number of species within a fixed area (e.g. types of tree, insects, birds). This gives an indication of biodiversity levels.
Quadrats can also be used to assess plant cover and/or the amount of footpath erosion taking place.
- estimate the % of plant cover or erosion with reasonable accuracy.
species count Strengths:
Provides quantitative data that is easy to present and analyse.
10x10 quadrats help to measure % with reasonable accuracy
species count Limitations:
Species counts might be inaccurate, especially if you are unfamiliar with local native wildlife.
Relies on sampling multiple sites. If time constraints mean you can only visit a few, this may be unrepresentative of overall biodiversity levels.
Measuring soil or water acidity/alkalinity using a pH meter
This can provide an indication of the levels of acid rain and local pollution.
It could also help explain biodiversity levels in the local area.
Measuring soil or water acidity/alkalinity using a pH meter - pros
Strengths:
Provides quantitative data that is easy to present and analyse.
Measuring soil or water acidity/alkalinity using a pH meter - Limitations:
If not maintained/cleaned carefully, pH meters can lose accuracy and produce unreliable readings.
Secondary Physical Geography data
- Old weather records from the Met Office; Flooding or erosion records from the Environment Agency.
Historical maps or photos which show changes in landscape
Other historical records. These could come from groups such as the Field Studies Council, universities, other school
Secondary Physical Geography data pros
Strengths:
The data set is likely to be larger and more comprehensive when collected by the government/a larger institution. E.g. the Met Office is a government agency with data for the whole UK.
Can be contrasted against your own primary data findings and used to strengthen/critique your conclusions.
Secondary Physical Geography data cons
Limitations:
Some sources of information may not be as reliable as they seem (e.g. some internet sources)
Some information might be harder to source e.g. historical maps that are kept in archives.