Practice Lacey’s Regime Equations (47.3.3) - Kennedy’s and Lacey’s Theory of Regime Channels

Practice: Lacey’s Regime Equations

Lesson 47.3.3Kennedy’s and Lacey’s Theory of Regime Channels

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10 questions

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6 sample questions

Question 1.
What does the velocity equation V = k * f^(1/2) * R^(2/3) represent?
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Focus on how velocity relates to channel dimensions and sediment.
Question 2.
Explain what the silt factor is in Lacey's theory.
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Think about how sediment influences flow characteristics.
3Question 3.
What is the formula for calculating the velocity in Lacey's equation?
- V = k * f^(1/2) * R^(2/3)
- V = Q/A
- V = P/Q
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Recall how velocity interrelates with silt and hydraulic conditions.
4Question 4.
True or False: The Silt Factor is related to channel design but not to sediment size.
- True
- False
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Think of the definition of the silt factor in context.
Question 5.
If you are designing a channel with a mean sediment size of 2mm, what is the silt factor? How would this affect the channel’s velocity?
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Use the silt factor equation to find your answer.
Question 6.
A channel is found to have a discharge of 10 m³/s with a velocity of 2 m/s. Calculate the area and describe how changes in area affect the design.
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Identify what happens when the area is adjusted in channel properties.

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