Other questions in this quiz

2. What's the definition of the hydraulic radius?

  • The proportion of water in contact with the bed and the banks of a river
  • The total length of the bed and the bank sides in contact with the water in the channel
  • The energy possessed by a river determined by the gradient
  • The proportion of perimeter of a stream channel cross-section that's in contact with the water - proportion of water in contact with the bed and the banks

3. The lower the hydraulic radius, the...

  • more water proportionally in contact with the bed and the banks
  • more erosion
  • less water proportionally in contact with the bed and the banks
  • faster the velocity

4. If the hydraulic radius is smaller, is there...

  • more erosion
  • more friction
  • faster velocity
  • less friction

5. Work out the hydraulic radius of a river with height of 5m and bed of 8m.

  • 40 ÷ 18 = 2.22m
  • 18 ÷ 40 = 0.45m

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