1. Culvert Hydraulics Hydrotechnical Design Parameters Channel Hydraulics Culvert Hydraulics Culvert Sizing

2. Culvert Hydraulics Hydrotechnical Design Parameters

3. Culvert Hydraulics Area Shape Slope Storage Density Vegetation Soil Type Initial Moisture

4. Culvert Hydraulics Options - Statistics Gauges >30 Years (212)

5. Culvert Hydraulics Options - Model

6. Culvert Hydraulics

11. ComponentGoverns% System Channel CapacityMost channels> 80% Historic HWMLarge streams~ 10% Runoff PotentialSmall basins< 5% Hydrotechnical Design Guidelines

12. Culvert Hydraulics Channel Capacity

13. Culvert Hydraulics Historic Highwater - AT

14. Culvert Hydraulics Basin Runoff Potential

15. Culvert Hydraulics

17. Channel Hydraulics

18. Culvert Hydraulics S 1 Y V = 14 Y 0.67 S 0.4 Normal Flow

19. Culvert Hydraulics B h T Q = AV

20. Culvert Hydraulics

21. S 1 1. Normal 2. RVF 3. GVF Other Flow Profile Cases

22. Culvert Hydraulics S 1 EGL EGL flows downhill Head loss at RVF E = Y + V 2 /2g

23. Culvert Hydraulics

24. Bridge Culvert

25. Culvert Hydraulics

26. RVF - Expansion RVF - Contraction Barrel – GVF + D/S Channel - Normal U/S Channel - GVF Trans - Adverse Trans - Steep

27. Culvert Hydraulics

31. Culvert Sizing

32. Culvert Hydraulics Sizing: Complex – need model Start :– Rise = burial + Y + headloss Range - sizes, shapes, barrels, profiles Parameters – V, freeboard/ponding Practical – drift/ice, future lining

33. Culvert Hydraulics Considerations: Fish Passage Blockage - Drift, Icing End Protection Works (V) Ponding: -Upstream Flooding -Uplift Failure -Embankment Stability -Road Overtopping