Gce Model Questions Vol1 2022 Geography Question 36
Practice objective / multiple choice question 36 from the 2022 Gce Model Questions Vol1 Geography examination.
A small agricultural catchment is 2.5 km long with a slope of 3% and a hydraulic radius of 0.4 m. Using the Kirpich formula \( T_c = 0.0195 L^{0.77} S^{-0.385} \) where \(L\) is length in metres and \(S\) is slope (m/m), calculate the time of concentration in minutes. Then, if the design storm has a peak intensity of 20 mm/h, determine the peak discharge \(Q\) (in m³/s) using the rational method \( Q = C i A \) where \(C = 0.45\), \(i\) is intensity in m/s, and \(A\) is catchment area. Approximate the catchment area as \(0.5 \times L \times W\) with width \(W = 0.6\) km. Give the peak discharge rounded to two decimal places.
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About This Question
This is Gce Model Questions Vol1 2022 Geography Question 36. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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