Gce Model Questions Vol1 2023 Geography Question 42

Practice objective / multiple choice question 42 from the 2023 Gce Model Questions Vol1 Geography examination.

Gce Model Questions Vol1 2023 Geography Objective / Multiple Choice Medium Difficulty
Question 42 GCE_MODEL_QUESTIONS_VOL1 • 2023 • GEOGRAPHY • objective

A 12 km\(^2\) catchment is composed of 40 % forest (runoff coefficient 0.15), 30 % agriculture (0.30) and 30 % urban (0.70). A design storm has an intensity of \(30\) mm h\(^{-1}\) lasting 10 min. Using the rational method \(Q = 0.00278\,C\,i\,A\) (where \(A\) is in hectares), calculate the peak discharge and state whether it exceeds a channel capacity of \(40\) m\(^3\) s\(^{-1}\).

Answer Options

A. No, the peak discharge (≈30 m³ s⁻¹) is well below the channel capacity, indicating no flooding risk.
Correct Answer B. No, the peak discharge (≈36 m³ s⁻¹) is below the channel capacity, so flooding is not expected.
C. Yes, the peak discharge (≈45 m³ s⁻¹) exceeds the channel capacity, so flooding is expected.
D. Yes, the peak discharge (≈50 m³ s⁻¹) surpasses the channel capacity, leading to potential flooding.
Correct Answer
B
Correct Option:
No, the peak discharge (≈36 m³ s⁻¹) is below the channel capacity, so flooding is not expected.

About This Question

This is Gce Model Questions Vol1 2023 Geography Question 42. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Geography examination.

Difficulty level: Medium .

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