A bridge is proposed to be constructed across an alluvial stream carrying a discharge of 1600 m³ /sec. Estimate the surface width of the river according to Lacey’s regime theory.
- A190 mCorrect
- B200 m
- C210 m
- D220 m
Solution
Concept
Regime width
Formula
P = 4.75 √Q
Step-by-step solution
1. 4.75 × √1600 = 190 m.
Explanation
Lacey perimeter.
Why the other options are wrong
Others do not follow.
Correct answer: A) 190 m