Waec Model Questions Vol1 2022 Geography Question 8
Practice objective / multiple choice question 8 from the 2022 Waec Model Questions Vol1 Geography examination.
A catchment of 2.5 km² is subjected to a design storm delivering 30 mm of rain in 2 hours. The runoff coefficient is 0.45. Using the rational method, calculate the peak discharge in m³/s. Then, assuming the discharge must be conveyed through a full‑flow circular concrete pipe, with Manning's n = 0.013 and slope = 0.001, determine the minimum pipe diameter required (in cm, rounded up to the nearest whole cm).
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About This Question
This is Waec Model Questions Vol1 2022 Geography Question 8. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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