Waec Model Questions Vol1 2017 Geography Question 45
Practice objective / multiple choice question 45 from the 2017 Waec Model Questions Vol1 Geography examination.
A 2.5‑ha agricultural field has a runoff coefficient of 0.35. The design storm intensity is 30 mm h⁻¹ lasting 1 h. Using the rational method Q = 0.278 C i A (Q in m³ s⁻¹, i in mm h⁻¹, A in ha), calculate the peak runoff discharge. If the drainage pipe is to convey this flow at a permissible velocity of 1.5 m s⁻¹, determine the minimum internal diameter of a circular pipe required (assume full flow). Give the diameter to the nearest 0.1 m.
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About This Question
This is Waec Model Questions Vol1 2017 Geography Question 45. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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