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rivers - Coggle Diagram
rivers
primary data
measuring width/ depth
Measuring velocity using corks
Pebble size and shape
Observation (Qualitative)
Field sketches (Qualitative)
Flood risk survey (Quantitative)
evaluation
Results from most groups supported the Bradshaw model
increased flood risk closer to the source and where there was urbanisation
Only visited 2 sites
visited on one day
weather conditions
vegetation in way of measurements
conclusions
river gets wider
river gets deeper
river egts faster
increase erosion
meanders became wider and more loopy
data presentation
bar chart
radar graphs for bedload angularity
flow-line maps
pie chart
results
The average velocity of the river increased
The cross sectional area of the river increased by over 100m2
Average bed load size decreased by an average of 2mm
Average bed load roundness increased with an average change of 0.5
enquiry question
How do channel characteristics change downstream?
How does flood risk compare between two sites.
location
scotsbridge mill
chesham moor
secondary data
Environment Agency Flood risk maps.
Maps to find river
theory