geography physical fieldwork

what was our title?

investigating downstream change on the river tillingbourne

what was our hypothesis?

the discharge will increase with distance downstream on the river tillingbourne

what 3 factors did we investigate (key questions)

width, velocity and depth

what theory underpinned our investigation?

the bradshaw model.

where is the river tillingbourne?

surrey, running close to the a25. flows west between dorking and guildford

give 3 reasons why the site was suitable.

small, achievable and accessible

give 3 risks

slipping, drowning and waterborne diseases

give one way we reduced risk of drowning

group working

give 3 ways to reduce risk of disease

don’t drink water, wash hands and cover cuts

give 3 ways we reduced risk of slipping

sensible footwear, don’t push, and no running

what sampling technique did we use and why?

stratified sampling to get valid data and make sure the areas were accessible

how was primary data useful to our investigation?

collected measurements of width, depth and height to prove hypothesis

how was secondary data important to investigation?

used maps to find suitable sites

what data presentation techniques did we use and why?

line graph for width and depth to show cross profile and bar chart for velocity

what was average depth at crossways farm?

0.2m

what was width at crossways farm?

1.24m

what was average depth at abinger hammer?

0.24m

what was width at abinger hammer?

5.6m

what was average velocity at crossways farm?

0.86m/s

what was average velocity at abinger hammer?

0.55 m/s

give 3 things that effected accuracy of results

abinger hammer only 2km downstream, may have been human intervention and other groups in river may have effected velocity

give 2 problem with width measurement

only measured once and weeds got in the way

give one issue with measuring velocity

hyproprop stufk in weeds

how could we make our results for velocity more accurate?

use a digital flow meter which isn’t affected by weeds

how did we collect width measurement?

using a tape measure held tight and straight