Gce Model Questions Vol1 2021 Geography Question 1
Practice objective / multiple choice question 1 from the 2021 Gce Model Questions Vol1 Geography examination.
A small urban catchment of 2.5 ha has a runoff coefficient of 0.6. During a design storm the rainfall intensity is 30 mm h⁻¹. Using the rational method, calculate the peak runoff discharge \(Q\). The drainage pipe must convey this flow on a slope of 0.001 (0.1 %) and is made of concrete (Manning \(n = 0.013\)). Determine the minimum internal diameter of a circular pipe that will convey the flow full‑pipe. Give your answer in metres to two decimal places.
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About This Question
This is Gce Model Questions Vol1 2021 Geography Question 1. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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