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6. What is the most common form of drainage network?

  • Dendritic
  • Deranged
  • Rectangular
  • Parallel
  • Radial

7. On steeper slopes, what form of drainage network is most common?

  • Rectangular
  • Trellised
  • Parallel
  • Deranged
  • Dendritic

8. What form of drainage network is formed around a volcano?

  • Radial
  • Trellised
  • Deranged
  • Dendritic
  • Parallel

9. What is the key control of drainage networks?

  • Sediments
  • All of the above
  • Tectonic/glacial activity
  • Geology
  • Relief

10. Stream ordering is a method of describing relative sizes of stream channels

  • True
  • False

11. What hierarchical ordering method of stream channels is most widely/commonly used?

  • Horton-Strahler Method
  • Shreve Method

12. The Horton-Strahler method works by..

  • A and B
  • Increasing the order by 1 when two streams of equal orders are confluent
  • Two confluent stream orders are added together
  • A and C
  • If two stream orders are unequal when they meet, the highest order remains

13. Shallow, narrow, forested streams are of...... than bigger, more complex, wider streams

  • A lower order
  • A higher order

14. There is higher complexity/ habitat diversity/ biodiversity at...

  • The confluences
  • The mouth
  • Estuary

15. Which of these increases downstream?

  • A and B
  • Substrate (cm)
  • Slope (%)
  • Width (m)
  • Bank erosion (cm/yr)

16. Which are more complex?

  • Network profiles
  • Traditional long profiles

17. What are the three key factors influencing sediment yield?

  • Relief, biodiversity, width of stream
  • Geology, wind, sunlight
  • Precipitation, geology and relief
  • Precipitation, biodiversity, watershed level
  • Relief, time of day, precipitation

18. Glaciers are a large contributer of sediment, with a fine sediment flux concentration in the summer period of glacial melt from turbid water

  • True
  • False

19. What is the main sediment supply to temperate systems?

  • All of the above
  • Landslides
  • Rill erosion (through fields)(30cm)
  • Rain splash
  • Gully erosion (30cm+)

20. Turbidity is..

  • Reduction of transparency of a liquid caused by the presence of undissolved matter
  • Typically used as a simple and convenient surrogate for the measurement of suspended solids
  • All of the above
  • An expression of the optical ability of a medium which causes light to be scattered rather than transmitted in straight lines