Gce Model Questions Vol1 2020 Geography Question 3
Practice objective / multiple choice question 3 from the 2020 Gce Model Questions Vol1 Geography examination.
A rectangular agricultural field of area \(0.1\) km² has a uniform slope of \(0.001\). During a storm the rainfall intensity is \(20\) mm h⁻¹ for 2 h, and the runoff coefficient is \(0.3\). Using the Rational method, calculate the peak runoff discharge \(Q\) in cubic metres per second. The drainage system consists of a circular pipe laid on the same slope, with Manning's roughness coefficient \(n = 0.013\). Determine the minimum pipe diameter (in metres, to two decimal places) that can convey this discharge when flowing full. (Use \(\sqrt{0.001}=0.03162\) and \(2^{4/3}=2.52\) for calculations.)
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About This Question
This is Gce Model Questions Vol1 2020 Geography Question 3. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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