Fieldwork Techniques Flashcards
What is the First Physical Fieldwork technique?
- Beach Profile/Slope Analysis
What is a Beach Profile/Slope Analysis?
- Measure the length of the beach/slope.
- This measurement allows us to determine the correct distance in order to carry out systematic sampling
How would we measure the Gradient? (Beach/Slope)
- To measure the gradient, put a ranging pole at the top and place a second ranging pole at first sampling point/visible change in the landscape.
- Then take a clinometer to measure the gradient - we do this twice for the average.
What other data can be taken? (Beach/Slope)
- Vegetation or Soil Samples can be taken at each sampling point.
- Vegetation would be collected using random sampling and a quadrat.
- A soil sample can also be taken (to be analysed at a lab), or a quick soil-type flow chart can be used.
What are the limitations of a Beach/Slope Analysis/Profile?
- Tide times can affect data collected on a beach.
- Ranging poles have to be held straight to ensure that they do not affect readings.
- There may be some user error when using the clinometer.
- It is important to keep the measuring tape held tight to ensure sampling points are accurate.
What is the second physical fieldwork technique?
- Stream Analysis
What is the first process of a Stream Analysis?
- When conducting a stream analysis, you would collect the width of a river using a tape measure.
- From here we use a systematic sampling strategy to then take the depths across the river using a meter stick.
What is the second process of a Stream Analysis?
- When this depth is collected - you must pick up the first pebble you touch. You can then check this against the roundness index chart and measure the longest axis of the pebble.
What is the third process of a Stream Analysis?
- From here you collect the weather perimeter, using a chain or pushing a measuring tape down the banks and base of the river.
- We can take velocity at 3 points across the river using a flow meter or a float device.
What are the limitations of a Stream Analysis?
- You need to keep the tape measure tight from bank to bank to get a true width reading.
- When taking depth, stand upstream and use a wooden measuring stick to ensure that it doesn’t bend to skew the reading
- Do not place the metre stick on a large rock as this may skew the depth results.
- When using the roundness index chart - it is subjective.
- When measuring velocity, the float device may get stuck which may increase the reading.
What is the final physical fieldwork technique?
- Micro-Climate Analysis
What are the processes of a Micro-Climate Analysis? (1)
- A compass should be used to determine North.
- A wind vane or wind sock should then be used to determine wind-direction.
- An anemometer should then be used to determine wind speed.
- You should take several readings to get an average = results more reliable.
What are the processes of a Micro-Climate Analysis? (2)
- Cloud coverage can be taken at each location through using the Okta Scale.
- You should use a digital or analogue thermometer to measure tempurature.
- Precipitation is measured using a rain gauge - this is a scaled glass funnel.
- Readings should be recorded at each location.
What are the limitations of a Micro-Climate Analysis? (1)
- Wind strength can be very hard to measure at ground level.
- Each temperature reading should be taken at the same height to keep the study standard.
- A rain gauge should be kept away from anything that may affect readings such as buildings, vegetation, etc.
What are the limitations of a Micro-Climate Analysis? (2)
- Cloud coverage can impact temperature readings.
- Cloud coverage readings can be subjective and therefore need more than 2 people to give a reading for an average.
What is the First Human Fieldwork technique?
- Environmental Quality Survey
What are the Positives of a EQS?
- EQS can be taken along footpaths over a period of time to identify changes in human impact.
- It may highlight areas off the path that are regularly visited, as busier areas can mean a lower environmental equality.
- These can be combined with electric footfall counters to quantify visitor numbers.
- These can be combined with annotated photographs to visually show the environmental quality.
What are the negatives of an EQS?
- It can be very subjective and it considers people’s personal opinions.
- A way around this is to get a group to carry out one and take an average of the scores to give a better representation of an area.
- Too large of a scale allows for too much variation. A smaller source allows for more consist results no a better representation of the area.
What is the second human fieldwork technique?
- A Bipolar Survey