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Open Channel

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

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Open Channel

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

  2. 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

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

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

  5. Best Hydraulic Section Design criteria

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

  7. Weirs Rectangular V-notch Cipolletti

  8. Hydraulic Jump Design concern Tidal bore

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