data collection types

• method: location maps (secondary)(qualitative)

  equipment: digimaps login online
• how is location maps taken:

  • go on the web address
  • login using password
  • search for Holford
  • zoom in and take a snip tool to copy
  • in word, use a frame tool and textbox with arrow shape to clearly label the map and add north arrows
• location maps justification:

  • it is crucial to know where you are going to be able to decide where to carry out the other methods
  • to use the map as a base to log where photos are taken
• location maps limitations:

  • it is time consuming to find the area and annotate
  • not all maps have scale bars, so its not very accurate
• method: velocity (primary)(quantitative)

  equipment: advanced flowmeter with impeller
• how is velocity taken:

  • stratified to find each site
  • systematic by dividing by 4 to get 3 points across the river to account for variances in speed to be able to get an average
  • put the impeller 1 inch below the surface, switch on the flowmeter, wait 10 seconds and read off and record data
  • leave impeller in water, wait 10 seconds, take the next reading and repeat for 3rd time
  • move to the next section of the site and repeat
  • then record final site
• velocity justification:

  • to be able to calculate velocity
  • the average allows greater accuracy
• velocity limitations:

  • leaves in the way
  • people stood upstream in the flow may have slowed it down
  • impeller getting stuck