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
Velocity?
pros + cons?
-used a short distance so quick and easy
-got a mean
-tennis ball got stuck against rocks sometimes
-used a longer measurement
Bedload shape?
-qualitative
-random
-10/15 rocks
-Power’s roundness index
-well rounded to very angular
Bedload size?
adv +dis?
-quick and convenient
-subjective
-not enough rocks
-collected more rocks
Representation of primary data?
-compound bar chart/bedload shape
-easy to compare
-we cannot see how many rocks were in the sample / bigger the sample more reliable
Secondary data?
Flood risk map
Crossways Farm -river flows naturally as a meander , flooding allowed to occur/ reduces flooding downstream
Gomshall- deepened and straigtened to store more water/ reduce flooding/ built up area
Interviews- how people have been affected/ how theyve managed the river
Conclusions?
agree- width,discharge,bedload size/shape
disagree- depth- slightly decreased/ hard engineering/human error
Urban fieldwork question?
To what extent do the land use functions and quality of urban environments differ
between West Hill and Epsom Town Centre?
Secondary data in urban fieldwork?
-crime stats
primary data in urban fieldwork?
-land use map photos
-environment quality
