Neco 2021 Geography Question 8

Practice essay / theory question 8 from the 2021 Neco Geography examination. This question covers Drainage .

Neco 2021 Geography Essay / Theory

Topic: Drainage

Question 8 NECO • 2021 • GEOGRAPHY • essay

A drainage basin in the middle Niger basin covers an area of 250 km² and receives an average annual rainfall of 1200 mm. The basin is currently 60 % forested (runoff coefficient 0.45) and 40 % under agriculture (runoff coefficient 0.65).

Question Parts

( a )

Calculate the annual runoff volume (in million cubic metres) from the basin using the given data.

( b )

If the proportion of agricultural land increases to 70 % while forest cover falls to 30 %, recalculate the annual runoff volume and determine the change in volume.

( c )

Discuss the likely implications of this increase in runoff for flood risk and water‑resource management in the basin.

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About This Question

This is Neco 2021 Geography Question 8. It is one of the essay questions from the 2021 Neco Geography examination.

The question covers Drainage .

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