Fieldwork Flashcards
Aim
To investigate how the features of a river change downstream
Hypothesis
Width increases downstream
Depth increases downstream
CSA increases downstream
Because of Bradshaw Model
About location
Drainage basin is 5.5 km^2 2.5km valley It was accessible with path Waterfall Not deep 150m height difference over 2.5km
Risk assessment
Slips, trips and falls- stout footwear Sunburn- suncream and sunhat Hypothermia- layers Medical issues-inhalers Road accidents- high viz jacket Emergency- mobile phone contact
Primary data
First hand collection- recordings of rivers width
Secondary data
Produced by someone else- ordinance survey map of Carding Mill Valley
Quantitive data
Measured accurately using equipment
Qualitative data
What you see…. Opinion e.g. Power’s scale of roundness
Sampling technique for locations along the river
Stratified
Systematic
Sampling technique used for depth of river- equidistant with taut tape
How to reduce errors with correct use of equipment- vertical, reduce bow wave etc.
Graphs used for cross sectional area
Scatter graph
Benefits of scatter graph
- show large amounts of data
- continuous scale
- correlation shown between variables
- can suggest further investigation by statistical analysis
Drawbacks of scatter graph
- can’t show anymore than 2 sets of data
- values are rounded up
Advantages of spearman rank
- proves or disproves a correlation
- shows the significance of the data
- allows for further analysis
- doesn’t presume 2 data sets are related
Disadvantages of spearman rank
Need 10 sets of values
Difficult/complicated process
