Flashcards in 5.1- Walton on the Naze fieldwork Deck (25)
What was the aim of your fieldwork?
to investigate the variation of land forms at Walton on the naze
What is qualitative data?
data that provides insights and opinions but no statistics
What is quantitative data?
data that involves statistics and measurements.
what kid of data is field sketches?
qualitative- insights and opinions
What kind of data is Photo annotations?
what kind of data is infiltration rate measurement?
what kind of data is ground cover measurement?
What kind of data is beach profile?
What did you do in the field sketches method?
sketched a rock face and annotated a top layer of gravel and sand, a middle layer of red rock and a bottom layer of English clay.then we annotated how erosion and sliding/slumping takes place
What did you do in the photo annotations method?
make annotations of a photo and studied how sliding/slumping occur
What did you do in the infiltration rate method?
put a drainage pipe in the ground and measured how long it took for a bucket f water to drain through at 5m, 10m, 15m and 20m
What did you do in the ground cover measurement method?
put a wire mesh on a grid at different depths and counted the amount of pebbles, rocks, sand and clay
What did you do in the beach profile method? method?
used a theodolite pointing at a measuring staff and taking measurements every 1 metre so we can find the gradient
Some students discovered that there tape measure was blowing in the wind and not producing accurate measurements. How could they solve this?
place rock down
use other students to hold it.
Why are the infiltration rate and gradient not reliable?
they depend on weather
what are the units for beach gradient?
What could you use to investigate becah gradient? (equipment)
What are the 3 types of sampling?
When is random sampling used?
When the area is the same throughout and it doesnt matter where you take samples from
When is systematic sampling used
when things change in a regular fashion. you take samples at equally spaced out points
When is stratified sampling used?
places with no regular pattern and the number of samples is a representative of the whole area
name some (hard engineering) coastal defences on the managed side of the beach
GROYNES - prevent transportation of sediments (LSD)
TERMINAL GROYNE- placed at the end of all the groynes to ensure sand doesn't pass through
SEA WALL- 3-5m high, and deflects the destructive waves.
name a (soft engineering) coastal defence on the managed side of the beach
PLANTS AND CLIFF REGRADING- adding sediments and covering it with mesh wire prevents rotational slumping, adding plants absorb the water when it rains, so prevent water infiltrating into the rocks and causing sliding and slumping.
what are some positives and negatives of the hard engineering coastal defences on the managed side of Walton on the Naze?
sea wall- requires low maintenance (lasts 30-50 years) however costs a lot of money (£500,000)
groynes- cheap (£2000) and prevent sea removing sand however expose other coastal areas further down stream.