Hydraulic Radius and Wetted Perimeter

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1. The lower the hydraulic radius, the...

  • more erosion
  • more water proportionally in contact with the bed and the banks
  • faster the velocity
  • less water proportionally in contact with the bed and the banks
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Other questions in this quiz

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

  • 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
  • The proportion of water in contact with the bed and the banks of a river
  • The energy possessed by a river determined by the gradient
  • The total length of the bed and the bank sides in contact with the water in the channel

3. The higher the hydraulic radius, the...

  • more friction
  • less deposition
  • more deposition
  • less erosion

4. Work out the wetted perimeter of a river with height of 5m and bed of 8m.

  • 2.22m
  • 13m
  • 18m
  • 40m

5. If River A has a hydraulic radius of 3m and River B has a hydraulic radius of 2m, which has the fastest velocity?

  • River A
  • River B

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