Neco Model Questions Vol1 2020 Geography Question 37
Practice objective / multiple choice question 37 from the 2020 Neco Model Questions Vol1 Geography examination.
A catchment of 2 km\(^{2}\) consists of three land‑use types: 40 % agricultural land with runoff coefficient \(C_{a}=0.30\), 30 % residential land with \(C_{r}=0.45\), and 30 % forest with \(C_{f}=0.15\). For a design storm of 30 min duration the rainfall intensity is \(I = 80\) mm h\(^{-1}\).\n\n(a) Using the rational method \(Q = C i A\) (where \(Q\) is in m\(^{3}\) s\(^{-1}\), \(i\) in m s\(^{-1}\) and \(A\) in m\(^{2}\)), compute the peak discharge from the catchment.\n\n(b) A circular concrete pipe of diameter \(D = 1.2\) m can convey a discharge given by the empirical formula \(Q_{max}=0.6 D^{2.5}\) (m\(^{3}\) s\(^{-1}\)). Determine whether the pipe is adequate to convey the design discharge.
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About This Question
This is Neco Model Questions Vol1 2020 Geography Question 37. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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