FieldWork Flashcards
Hydrograph?
a graph showing changes in a river’s discharge and rainfall over time
Quantitative Data?
using numbers e.g velocity
Qualitative data?
-describes characteristics
-collected using questionaires,observations or interviews
Stratified Sampling?
dividing sampling into groups
e.g 5 people per age category
Systematic Sampling?
data that is collected at regular intervals
e.g every 20m
What is the enquiry question?
How do the river valley and channel characteristics vary along the River Tillingbourne?
Sub Quesions?
Does the River Tillingbourne follow the Bradshaw model?- we expect it to follow it
How have humans influenced and been influenced by the channel characteristics?
3 sites?
Site 1=Crossways farm
Site 2= Abinger Hammer
Site 3= Gomshall
Secondary data for the river tillingbourne?
Environement agency flood risk map- quantitative
Interviews with local residents- qualitatitve
Stratified sampling adv +dis?
-wider representation
-prior knowledge of an area is neccessary
Random sampling
adv+dis?
-remove bias
-equal chance
-some people may not want to be interviewed
-some points may be clustered
Systematic sampling advantages?
disadvantages?
-gives a good representation of the whole river
-quick and easy
-variations can be missed if intervals are too far apart
Channel Width?
-quantitative + stratified
-point where the water met the bank
Channel Width
pos+Neg
-quick+easy+accurate
-Crossways farm was a meander whereas the other were straight
-only took one measurement
Velocity?
-quantitative + stratified
-two people stood 5m apart in the river and dropped a tennis ball/ measured time
-velocity = distance/time