rivers fieldwork Flashcards
primary data
data that i collected myself at the sites
secondary data
data received from other sources, that we havent collected ourselfs
how can human activity interfere with river processes (4 way)
- Straightening the river (hold more discharge and water)
- Dredging (scrape along bed of the river to clean silt)
- Changing the land use such as adding more roads- speeding up surface run off
- Deforestation (speed up time take for water to reach a river)
what river are we referring too for our fieldwork and where is it located
river Tillingbourne in the south east of England, between dorking and Guildford
name some risks that can occur at the site
disease
slipping on uneven terrain
farm animals causing injury
heavy rain
drowning
name two factors that should be considered when choosing the locations
- safety (checking depth of water, organise appropriate footwear)
- accessibility to the site
quantitative data
numerical data
qualitative data
any information gathered that is not numerical data
ways in which we presented our data
scatter graphs
annotated photos
what decreases as you go downstream
slope angle
load particle size
channel bed roughness
what increases as you go downstream
load quantity
discharge
channel width
average velocity
load quantity
what were our data did we collect…
width of the river
depth of the river
velocity of the river
annotated sketches
what is stratified sampling
dividing sampling into groups eg. 5 ppl from each age range or 3 points from each river
what is random sampling
selecting a person to interview or site to measure, at random.
what is systematic sampling
collecting data in an ordered or regular way
