River fieldwork Flashcards
Where did we go?
Carding mill valley
What was our hypothesis?
the bedload size will decrease and its velocity will increase with distance downstream.
What factors were considered when we chose this location?
-low/manageable risk
-manageable in terms of time
-appropriate scale
-data available
What were the advantages of our location?
-very accessible- public parking so we could reach the general location, foot paths so we could navigate around the river safely, close to river so we could reach there in sufficient time, owned by National Trust which provided toilets and shelter so we could go to the toilet and be shielded from possible rain.
-depth of the river was quite shallow reducing the chances of major injury if we well in, reducing drowning risk.
-suitable with the aim of the trip, lots of tributaries means we see the discharge’s impact on a river’s characteristics.
-suitable length so we could gather data from multiple sites showing a pattern.
Give risks and solutions we overcame:
-disease- we didn’t drink the water and sanitised before eating, wore appropriate clothes that suited the weather
-slipping- we used appropriate walking boots and stuck onto the trail.
-lost- we followed the path and stayed between teacher supervision
-drowning- stayed away from the river on the path.
-attacked by animals- we didn’t agitate them and stayed far away from them.
-getting harmed- we didn’t throw rocks around and were cautious of where we placed our footing.
What model shows the concept of our trip?
Bradshaw model which shows as bedlam size decreases and becomes rounder, velocity increases downstream.
What type of data were we collecting on our trip?
primary data
What type of sampling did we use?
systematic sampling - where we collected samples at set intervals to get a general measuring of the site
Describe the method of how we investigated bed load size and justify it:
-when we reached the location we measured the width of the river using a measuring tape
-we divided the width by 11, giving us 10 intervals which we systematically collected our samples.
-using a ruler, we collected a piece of bed load at each interval
-with everything collected in order, we measured the A axis (longest length) of each one with a ruler.
-once all 10 samples were measured we calculated the mean to get the average bed load size of the site.
Describe the method of how we investigated bed load roundness and justify it:
Describe the method of how we investigated velocity and justify it:
