Neco Model Questions Vol1 2017 Geography Question 7
Practice objective / multiple choice question 7 from the 2017 Neco Model Questions Vol1 Geography examination.
A 2 km² catchment is 60 % residential (runoff coefficient \(C=0.7\)) and 40 % open grass (\(C=0.3\)). Using a 10‑year storm of intensity \(i=80\) mm h⁻¹ for 30 min, determine the minimum diameter of a circular concrete culvert (Manning \(n=0.013\), slope \(S=0.001\), length 30 m) that can convey the peak discharge. Give the diameter in centimetres, rounded up to the nearest centimetre.
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About This Question
This is Neco Model Questions Vol1 2017 Geography Question 7. It is one of the objective questions from the 2017 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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