• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6
7. 7
7
8. 8
8
9. 9
9
10. 10
10
11. 11
11
12. 12
12
13. 13
13
14. 14
14
15. 15
15
16. 16
16
17. 17
17

# Analysis of a streams discharge.

Extracts from this document...

Introduction

Analysis 1). The streams discharge increases downstream. Discharge 0.01 0.04 0.04 0.04 0.06 0.05 0.19 0.1 0.2 0.17 0.18 0.13 0.26 0.34 0.15 0.33 There is a weak positive correlation in the discharge. As the stream moves downstream the discharge increases according to the results. There are a few anomalous points making it a weak positive correlation. This proves my hypothesis. 2). The streams width increases downstream. Width 1.8 2.7 2.5 3.01 3.1 3.39 4.9 4.95 7 5.13 4.6 7.24 6.8 6.87 7.3 8.1 There is a strong positive correlation between the width and the stream downstream. The streams width increases downstream according the results and the graph proving my hypothesis. 3). Hydraulic radius will increase downstream. Hydraulic radius 0.03 0.15 0.06 0.1 0.09 0.08 0.15 0.15 0.11 0.1 0.12 0.11 0.19 0.19 0.19 0.33 There is a weak positive correlation between the stream downstream and the hydraulic radius. The streams hydraulic radius increases downstream proving my hypothesis. 4). The velocity will decrease downstream. Mean velocity 0.07 0.09 0.19 0.1 0.19 0.16 0.2 0.12 0.31 0.27 0.26 0.15 0.2 0.27 0.09 0.12 There is no correlation on the graph as there are too many anomalous points on the graph, this is because rocks affected the measurements but there is a correlation as the velocity increases downstream according to the results, which disagrees with my hypothesis. ...read more.

Middle

10 -7 49 14 0.34 1 2 13 -12 144 15 0.15 8 4 9 -1 1 16 0.33 2 19 1 1 1 Total 908.5 R=1-6?d2 N3 - N R=1-6*908.5 4096-16 R=1-5451 4080 R=1-1.3360 R=-0.336 Our r-value of -0.336 suggests a weak negative correlation between the gradient and the discharge. 2). There is a positive relationship between the velocity and the gradient. Mean velocity 0.07 0.09 0.19 0.1 0.19 0.16 0.2 0.12 0.31 0.27 0.26 0.15 0.2 0.27 0.09 0.12 Gradient 7 15 2 12 5 10 2 5 2 9 0 2 3 2 4 10 There is a negative relationship between the velocity and the gradient, which disagrees with my hypothesis. This is because at the upper course the gradient is steep but there is a small volume of water meaning that there is a low velocity but as the stream moves downstream there is a lower gradient and there is more erosion so the width increases making the velocity increase. Spearman's r test Station no. Velocity Rank A Gradient Rank B D A-B D2 1 0.07 16 7 6 10 100 2 0.09 14.5 15 2 12.5 156.25 3 0.19 7.5 2 13 -5.5 30.25 4 0.1 13 12 3 10 100 5 0.19 7.5 5 7.5 0 0 6 0.16 9 10 4 5 25 7 0.2 5.5 2 13 7.5 56.25 8 0.12 11.5 5 7.5 4 16 9 0.31 1 2 ...read more.

Conclusion

Calibre of load 72 170 189 153 102.5 69 300 203.5 128 130 164.5 130 88.3 106 107 188 Hydraulic radius 0.03 0.15 0.06 0.1 0.09 0.08 0.15 0.15 0.11 0.1 0.12 0.11 0.19 0.19 0.19 0.33 There is a positive correlation between the calibre of the load and the hydraulic radius. This disagrees with my hypothesis. This is because as the decrease in velocity causes the river to deposit its load further downstream than upstream. The hydraulic radius increases because there is a larger amount of water so the rivers width increases the hydraulic radius. Spearman's r test station no. hydraulic rank A calibre rank B d A-B D2 1 0.03 16 72 15 1 1 2 0.15 7 170 5 2 4 3 0.06 15 189 3 12 144 4 0.1 12.5 153 7 5.5 30.25 5 0.09 14 102.5 13 1 1 6 0 1 69 16 -15 225 7 0.15 7 300 1 6 36 8 0.15 7 203.5 2 5 25 9 0.11 10.5 128 10 0.5 0.25 10 0.1 12.5 130 8.5 4 16 11 0.12 9 164.5 6 3 9 12 0.11 10.5 130 8.5 2 4 13 0.19 4 88.3 14 -10 100 14 0.19 4 106 12 -8 64 15 0.19 4 107 11 -7 49 16 0.33 2 188 4 -2 4 total 712.5 R=1-6?d2 N3 - N R=1-6*712.5 4096-16 R=1-4725 4080 R=1-1.158 R=-0.158 There is a weak negative relationship between the hydraulic radius and the calibre of the load. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Hydrology & Fluvial Geomorphology section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Hydrology & Fluvial Geomorphology essays

1. ## Study the downstream changes of Loughton Brook.

My final hypothesis was that the pebble size and shape would decrease and become more rounded as the stream order increased. At the source of the river, the pebbles were very angular and larger but downstream they were much smoother and smaller.

2. ## How does Loughton Brook change as it moves downstream?

technique used to measure the width of the river was very efficient and effective as it was very straightforward. This will gather evidence for the first key question. * The technique used to measure the depth of the river is very helpful as we can use the results to draw

1. ## Whitewell Brook: To what extent does the discharge of the Whitewell Brook agree with ...

bonio dog biscuit, tennis ball) We worked in groups of four because we felt that was a sufficient number of people to record the data and found an efficient working speed working with this amount of people. We collected six sets of data in total, each set coming from different sites along the river.

2. ## Do the Characteristics of a river change downstream?

River Wharfe - The lower/middle course of the river. The River Wharfe itself begins at quite a distance from Ilkley. It originates at the peat bogs in Langstrothdale chase near and Syke moor. It ends when it joins the River Ouse near Selby where it itself ends at the Humber Estuary near Hull.

1. ## Investigate how the velocity of rivers changes.

This material will erode the outside bank by corrasion. The bank will be undercut, collapse and retreat to leave a small river cliff. During the lower course of the River Rhymney at Draethen the river widens its valley by lateral erosion.

2. ## Can the Chalk Streams of the Chilterns be managed Sustainably?

In summer, as the water table drops so the source of the river moves back down stream. Low rainfall has an enormous effect on groundwater-fed rivers. In September 1997 the River Chess was dry through Chesham and the River Misbourne was dry for 17km down to Gerrards Cross.

1. ## Edexcel Geography B Unit 3 Coursework

therefore it was necessary to deploy the concept of sampling. Table 2.1 Variable Method of collection Description of method/variable Justification/ relevance Image Disadvantages/ limitations of method Average velocity (m/s) An Impeller is placed into three equally spaced out spots along the width of the channel.

2. ## An Investigation of Channel and Stream Characteristics For Streams on the Isle of Arran

Having investigated this subject it has become apparent to me that reliable field measurements are difficult to make and many experiments have been carried out in laboratories where conditions can be simplified. Rolling is the primary mode of transport in gravel-bed streams while saltation is found largely where grains are sand sized.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work