Neco Model Questions Vol1 2018 Geography Question 3
Practice objective / multiple choice question 3 from the 2018 Neco Model Questions Vol1 Geography examination.
A 5‑ha field has a uniform slope of 0.001. A storm delivers \(80\) mm of rain uniformly over \(6\) h. The soil infiltration capacity is \(5\) mm h\(^{-1}\). (a) Assuming runoff occurs uniformly during the storm, calculate the minimum discharge (in m³ s\(^{-1}\)) that a drainage ditch must convey to avoid water‑logging. (b) If the ditch is rectangular, \(1.2\) m wide, has Manning's roughness coefficient \(n = 0.025\) and the same slope as the field, determine the minimum depth of flow required to convey the discharge found in part (a). Give the depth to two decimal places (m).
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About This Question
This is Neco Model Questions Vol1 2018 Geography Question 3. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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