River Tillingbourne

Question 1

Title

Answer 1

To investigate downstream change on the river tillingbourne

Question 2

Hypothesis

Answer 2

The discharge will increase with distance downstream on the river tillingbourne this is because additional rivers are added

Question 3

Location

Answer 3

Juniper hall river tillingbourne

Question 4

Key facts

Answer 4

• small short river
• small drainage basin
• closes to A25
• 19km long

Question 5

Why was this site chosen

Answer 5

Small river safe to study
Short river easy to study how length changes
Accessible transport wise
Change in river can be seen over a short distance

Question 6

What were the 2 locations

Answer 6

Abinger hammer (6km)
Cross ways farm (3km)

Question 7

How do you work out discharge

Answer 7

Discharge = width X depth X velocity

Question 8

Describe the technique of obtaining the depth

Answer 8

• use a ruler place on the river bed measure how high the water was
• hold perpendicular to river bed and in the middle of the bank
• repeat at different points across the width of the bank

Question 9

Describe the technique of obtaining the width

Answer 9

• use a measuring tape stretch across river banks hold parallel to water surface measure form bank to bank
• repeat along the river calculate a mean

Question 10

Describe the 2 technique of obtaining the velocity

Answer 10

1:
Use a measuring tape to set out a certain distance place a cork at one end and time using a stopwatch how long it takes to travel on along the given distance
Then do speed = distance / time

2:
Use a hydro prop and timer

Question 11

What were the limitations and improvements for depth

Answer 11

• Rutledge could be pushed by water and then be diagonal and provide inaccurate reading
  + have someone looking for the side to make sure it is at 90°

Question 12

What were the limitations and improvements for width

Answer 12

• uneven bank, water can push the measure it tape
  + measure at different points along and calculate a mean, hold above water

Question 13

What were the limitations and improvements for velocity

Answer 13

• wind could blow cork of course and get stuck in greenery or easily lost
  + use a hydroprop

Question 14

What were the 3 potential risks

Answer 14

Fast water flowing
Disease
Muddy

Question 15

How did u limit the risks

Answer 15

Fast flowing water - check the depth and stay close to river bank
Disease - wash hands thoroughly
Muddy - wear shoes with grip

Question 16

What was the depth at crossways farm (3km)

Answer 16

0.18 m

Question 17

What was the width at crossways farm (3km)

Answer 17

1.2m

Question 18

What was the velocity at crossways farm (3km)

Answer 18

0.18 m/s

Question 19

What was the discharge at crossways farm (3km)

Answer 19

0.039

Question 20

What was the depth at abinger hammer (6km)

Answer 20

0.21 m

Question 21

What was the width at abinger hammer (6km)

Answer 21

5m

Question 22

What was the velocity at abinger hammer (6km)

Answer 22

0.38 m/s

Question 23

What was the discharge at abinger hammer (6km)

Answer 23

0.39

Question 24

what was the data presentation method for width

Answer 24

located map using proportional circles - larger circle greater width, then plotted at each site
- Circle size makes comparison easy — wider river = bigger circle.
- Visualises trends — helps quickly spot if width increases downstream.

Question 25

what was the data presentation method for depth

Answer 25

Cross-Sectional Graphs - Visually shows depth variation across the river at each location (e.g. from bank to bank). - Makes it easy to compare shape and depth between upstream (3 km) and downstream (6 km). - Helps identify features like deeper channels or thalweg (deepest part of the river), which are key in river studies.

Question 26

what was the data presentation method for velocity

Answer 26

line graph - Clearly shows trends (e.g. does velocity increase downstream?) - Good for showing relationship to river characteristics (like gradient or channel shape).

Question 27

how suitable is the location

Answer 27

- Crossways Farm allows data collection near the upper course, showing early river characteristics. - Abinger Hammer provides a downstream comparison, allowing investigation of how the river’s width, depth, velocity, and bedload change. - Both sites are safe and accessible, with clear differences in river features, making them ideal for testing the Bradshaw Model. - Minor limitations due to human impact exist but do not significantly affect the fieldwork validity.