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What is the regime scour depth for a channel in soil with silt factor of unity and carrying 8 m2/s of discharge intensity in accordance with Lacey’s regime theory?
  • a)
    3.6 m
  • b)
    4 m
  • c)
    5.4 m
  • d)
    25.6 m
Correct answer is option 'C'. Can you explain this answer?
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What is the regime scour depth for a channel in soil with silt factor ...
Regime scour depth
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What is the regime scour depth for a channel in soil with silt factor ...
The regime scour depth for a channel in soil with a silt factor of unity and carrying 8 m2/s of discharge intensity according to Lacey can be calculated using the following formula:

D = 0.242 Q1/2 / (g1/6 S3/2)

Where:
D = Regime scour depth (m)
Q = Discharge intensity (m2/s)
g = Acceleration due to gravity (9.81 m/s2)
S = Slope of the channel

Assuming a slope of 0.001, the calculation becomes:

D = 0.242 x 81/2 / (9.81 1/6 0.0013/2)
D = 0.242 x 8.485 / (1.687 x 10-3)
D = 122.85 m

Therefore, the regime scour depth for a channel in soil with a silt factor of unity and carrying 8 m2/s of discharge intensity according to Lacey is approximately 122.85 meters.
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What is the regime scour depth for a channel in soil with silt factor of unity and carrying 8 m2/s of discharge intensity in accordance with Lacey’s regime theory?a)3.6 mb)4 mc)5.4 md)25.6 mCorrect answer is option 'C'. Can you explain this answer?
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