physical fieldwork

Question 1

what was the title of this geography enquiry

Answer 1

how does the long profile of duck brook change downstream

Question 2

what was our hypothesis
(3 things)

Answer 2

• width and depth of the river will increase downstream
• velocity will increases downstream (speed of water)
• reload size will decrease downstream

Question 3

describe the risk of uneven surfaces
how can the risk be reduced

Answer 3

the rocks on the river bed will cause an uneven surface
wear appropriate footwear

Question 4

describe the risk of slippery surfaces
how can the risk be reduced

Answer 4

the rocks may have built up a slippery layer
wear appropriate footwear

Question 5

describe the risk of water pollution
how can the risk be reduced

Answer 5

bacteria in the water could cause disease
antibiotic hand gel

Question 6

describe the risk of deep water
how can the risk be reduced

Answer 6

you could drown
check live depth

Question 7

what equipment is used to measure the velocity of the river and what units is it measured in

Answer 7

hydroprop, stopwatch
m/s

Question 8

what equipment is used to measure the river depth and what units is it measured in

Answer 8

metre ruler
cm

Question 9

what equipment is used to measure the river width and what units is it measured in

Answer 9

tape measure
m

Question 10

what equipment is used to measure the sediment size and type and what units is it measured in

Answer 10

powers index ruler
cm

Question 11

describe the method on measuring the channel depth

Answer 11

1. measure the width of the river with a tape measure at your first site. Record this distance. keep your tape measure across the river. You will use it to measure the distance between each depth measurement you take.
2. divide the width by 11. this will give you the distance between each measurement
3. measure the depth of the river against the bank. record this.
4. take your next measurement at the distance you identified in stage 2
5. repeat this until you have depth measurements across the width of the channel

Question 12

describe the method on measuring the velocity

Answer 12

use the hydro prop to record the velocity in m/s at three points along the width of the river at each site. add them together and divide by 3 to get a mean average.

Question 13

describe the method on measuring the river width

Answer 13

measure the entire length of the river bed bank and sides in contact with the water

Question 14

how do find the cross sectional area

Answer 14

the cross sectional area is a simple calculation to measure the amount of water at each sit
csa= width x average depth

Question 15

at site 1, how did I describe the river

Answer 15

narrow, shallow, vegetation, waterfall

Question 16

at site 2, how did I describe the river

Answer 16

slightly wider, meander

Question 17

at site 3, how did I describe the river

Answer 17

deep, fairly wide, lots of debris

Question 18

at site 4, how did I describe the river

Answer 18

wide, slow moving, open

Question 19

which of our hypothesis were met

Answer 19

• the river width and depth did increase as we went downstream
• the bedload did decrease as we went downstream however its not very accurate as we don’t have an accurate amount of data
• the mean velocity decreased as we went down stream which went against our hypothesis