Neco 2022 Geography Question 8

Practice essay / theory question 8 from the 2022 Neco Geography examination. This question covers Drainage .

Neco 2022 Geography Essay / Theory

Topic: Drainage

Question 8 NECO • 2022 • GEOGRAPHY • essay

A small river basin in the middle belt of Nigeria has the following characteristics for a design storm of 10 minutes duration:

Question Parts

( a )

Given a catchment area of 25 km², a rainfall intensity of 80 mm h⁻¹, and a runoff coefficient of 0.55, calculate the peak discharge (in m³ s⁻¹) using the Rational Method. Show all steps and justify the choice of the runoff coefficient.

( b )

Using the peak discharge obtained in part (a), discuss qualitatively the type of channel cross‑section and roughness coefficient that would be appropriate to convey the flow safely, referring to Manning’s equation where relevant.

( c )

Identify two human activities that could aggravate drainage problems in this basin and propose one engineering or management measure for each activity to mitigate the impact.

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About This Question

This is Neco 2022 Geography Question 8. It is one of the essay questions from the 2022 Neco Geography examination.

The question covers Drainage .

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