3. Open Channel Storm water Irrigation
Waste water collection and treatment

5. Types of open channel flows –
Steady flow – when discharge (Q) does not change with time.
Uniform flow – when depth of fluid does not change for a selected length or section of the channel
Uniform steady flow – when discharge does not change with time and depth remains constant for a selected section.
cross section should remain unchanged – referred to as a prismatic channel

6. Open Channel Flow Hydraulic radius: R = A/WP
Do not include free surface in wetted perimeter.

7. Open Channel Flow Re = V R/ Laminar flow: Re < 500
Turbulent flow: Re > 2000

11. Best Hydraulic Section
Design criteria

12. Manning Equation
USCS
Q = (a/n) A R2/3 So1/2
a = 1.49
SI: a = 1.0

16. Weirs
Rectangular
V-notch
Cipolletti

18. Hydraulic Jump
Design concern
Tidal bore