• 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

See related essaysSee related essays

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. Edexcel Geography B Unit 3 Coursework

    This increases friction with the water and bed resulting in low efficiency where load cannot be transported. Despite this the hydraulic radius does increase by such a subtle amount, which is due to the small-scale increases in the cross-sectional area of the River Holford downstream.

  1. Investigate how the velocity of rivers changes.

    I converted my results into cm/s for ease of plotting on the graph as I could plot whole numbers. The line chart shows the time taken for the ping-pong ball to reach the end of the stretch of river at certain sections of the river.

  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. How does Loughton Brook change as it moves downstream?

    This is situated approximately 400m South East of the Field Study Centre. � The Second site is called the 'Stream order 2 between fallen'. This is situated approximately 500m South South East of my first site and 900m away from the Field Study Centre.

  2. Do the Characteristics of a river change downstream?

    The river runs down a moderately steep sloping gradient for 1km or so towards the River Wharfe then goes on to a somewhat gentler slope for the remainder. This is apparent by the way the contours are grouped together on the map (appendix 4.)

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

    As each tributary enters the river the discharge of the river is increased. When a tributary enters the river the catchment area of the whole river increases by the size of the tributaries catchment area. So, as we move downstream there are more and more tributaries joining the river, therefore

  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