Fieldwork paper 3:Tarrell (physical) Flashcards
What is your physical fieldwork question
How does the cross section of the river farrell change as we move down stream?
Why was your physical fieldwork question suitable for a geographical enquiry
- geographical; bradshaws upstream downstream theory
- appropriate scale; short river, collected 10 sets of date in one day
- Low risk; not deep or wide to enable measurements
-date easily collectible; needs low tech equipment can be done in one day
what about the location of the river made us able to collect date
all Uk rivers are monitored so we have access to secondary data and from previous years and river was relatively shallow so measured with low tech equipment
What was the theory we used for our physical fieldwork? What did they say?
Bradshaws theory; Channel width and channel depth should increase downstream. Overall the cross section should increase.
Name some risk taken into consideration and what actions you took to avoid these from occurring
-Hypothermia; we work layers, spare clothes that were also water proof clothes
-Drowning;collected data in small supervises groups to watch out for difficulties
-Slipping on rocks; first aid kit and mobile phone to call for help incase of emergency
How did we measure the width of the River? State your evaluation
We needed to measure the width 10 places along the long produce of to see if bradshaw theory applied.
Evaluation;
-Good; equip affordable and easy to use
-Bad;tape measure would sag in the middle due to increase of speed downstream of river which caused some difficulty when gaining results
-Overall;Good got results and worked well sagging of tape measure coukd be fixed (put someone in middle to hold it)
How did we measure the width of depth of the river? state your evaluation
-Good; measured 5 times across improving accuracy with easy to use and affordable equipment
-Bad;results were occasionally affected by person standing behind the tiller had to stand ifront of the river(less representative)
-Overall; easy to get results and very representative
What type of sampling did we use? guve definition
Stratified sampling; Where you take sampling from each group
Evaluate our sampling
-We chose 10 sites spaced out, 3 in the upper course,4in the middle course and 3 in the lower.
-Had to cherry pick results as river was too deep or dangerous in certain areas; so we influence results meaning they are not the MOST accurate
what was Good about our sampling?
We could choose where we went allowing us to reduce risks
Evaluate our secondary data
Google earth; to add to our primary data we saw how the river tarred changed downs stream to plan our field work
What are the benefits of Maps
Choose suitable sites for data collection based on accessibility
to add to primary data
What are the benefits of Photos
To see changes year after year
can highlight important features
What was our method 1 to represent our processed data? why?
Bar charts
- Easy to understand and read shows patterns (simply and visual)
-Bad; unevenly spaced (inaccurate)
- doesn’t not show width change between sites
not showing depth which makes up the cross section
Justify the locates cross section method
Good;
- shows depths and width; cross section graphically
- didfereence distanced between courses is more accurate
fits the QUestion
Bad; more difficult to interpret
How would you improve our method of measure width? name issue and improvement
Issue; Tape would sage in middle when caught with current
Improvement; Someone would hold tape in middle so it remains tight across the river
So.. Made results more accurate
and helped us find out that yes the width gets wider down stream
How would you improve our measure ment of the depth? talk about issue and improvement?
Issue; further downstream the gafapd entered ghe depth measurements were much larger as we still only measured at 5 points across
Improvement; as the river gets wider measure ghe depth more than 5 times to reduce the amount of anomalies that coukd occur
