Neco Model Questions Vol1 2018 Geography Question 33
Practice objective / multiple choice question 33 from the 2018 Neco Model Questions Vol1 Geography examination.
In a catchment area the total length of all streams is \(120\) km and the basin area is \(300\) km\(^2\). (a) Calculate the drainage density \(D\). (b) If a drainage density greater than \(0.5\) km km\(^{-2}\) indicates poor infiltration, comment on the infiltration characteristic of the basin. (c) The longest watercourse in the basin is \(12\) km long and the average slope of the basin is \(0.02\) (m m\(^{-1}\)). Using the Kirpich formula \(T_c = 0.01947\,L^{0.77}\,S^{-0.385}\) (where \(T_c\) is in hours), compute the time of concentration and state whether the basin is prone to flash flooding (assume flash‑flood prone if \(T_c < 2\) h).
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About This Question
This is Neco Model Questions Vol1 2018 Geography Question 33. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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