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Lecture 07: Open Channel Controls, Transitions and Afflux - Tutorial

Lecture 07: Open Channel Controls, Transitions and Afflux - Tutorial CEM001 Hydraulic Structures, Coastal and River Engineering River Engineering Section. Dr Md Rowshon Kamal rowshon@legendagroup.edu.my H/P: 0126627589. 1.

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Lecture 07: Open Channel Controls, Transitions and Afflux - Tutorial

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  1. Lecture 07: Open Channel Controls, Transitions and Afflux - Tutorial CEM001 Hydraulic Structures, Coastal and River EngineeringRiver Engineering Section Dr Md Rowshon Kamal rowshon@legendagroup.edu.my H/P: 0126627589 1

  2. Q1: Compare different types of transitions connecting a lined channel carrying a maximum flow rate of 6 m3/s. Depth of flow is 1.53 m, side slopes 1.5:1 and a rectangular bridge crossing 10 mlong. The overall head loss is 0.1 mbetween u/s and d/s canal reaches. The u.s. canal bed level is at datum 10 m. Assume the same type for inlet and outlet transitions. Width of the channel= 2.4 m. Example 01 2

  3. Solution for Example 01 3

  4. Solution for Example 01 4

  5. Solution for Example 01 5

  6. Solution for Example 01 6

  7. Solution for Example 01 7

  8. Solution for Example 01 8

  9. Solution for Example 02 A bridge opening has details as listed below. Use the d’Aubuisson formula with a value of K = 0.9 to calculate the afflux caused by a flow rate of 46 m3/s. Give your answer to the nearest mm, and state the assumptions for the application of this formula to be valid in this situation. Upstream and downstream of bridge: rectangular channel with width 20 m Bridge opening: rectangular with width 18 m Downstream water depth 2.2 m Discuss measures involving fluming of a bridge that could be taken to enable higher flows to pass without excessively increasing upstream levels. 9

  10. Solution for Example 02 10

  11. Solution for Example 02 11

  12. Example 03 12

  13. Solution for Example 03 13

  14. Describe different forms of channel transition, with details of where these are required, and discuss the design criteria that would apply to these situations. 03 14

  15. Thank You 15

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