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3 cards from this section. Quick, good the night before a test.
Define Manning's coefficient and provide a rough estimate for natural channels.
Look into standard tables for roughness values.
What does the hydraulic radius represent in flow calculations?
Recall the formula for hydraulic radius.
What is the correct value of Manning's coefficient for a clean, straight channel?
Refer to your Manning's n tables.
Is the flow velocity in Manning's equation directly proportional to hydraulic radius?
Think about how changes in radius would affect flow.
A river has varying widths and depths across sections, with flowing conditions listed below: 1st section (width 2m, depth 1m, n=0.035); 2nd section (width 3m, depth 2m, n=0.025). Calculate the total flow rate using Manning's equation.
Ensure careful tracking of each section's flow.
You have a square channel 5m by 5m, with a slope of 0.002 and a Manning's coefficient of 0.03. Determine the flow velocity and total discharge.
Be systematic in your calculations.
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