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5 cards from this section. Quick, good the night before a test.
What does the 'Q' represent in Lacey's equations?
Think about water flow in a channel.
What is the purpose of the wetted perimeter equation?
Consider how water interacts with a channel's geometry.
What is the primary assumption of Lacey's Theory?
Think about the main goal of channel stability.
True or False: The hydraulic radius is the area of flow divided by the wetted perimeter.
Recall the formula we discussed for hydraulic radius.
Using Lacey’s velocity equation, if the flow discharge (Q_f) is 210 cumecs, calculate the mean velocity.
Insert the value of Q_f into the velocity equation.
Calculate the hydraulic radius when Q is 120 cumecs and V is previously calculated as 1.2 m/s using Lacey’s formula.
Use the hydraulic radius formula and ensure you have f before attempting.
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