Neco Model Questions Vol1 2025 Geography Question 8

Practice essay / theory question 8 from the 2025 Neco Model Questions Vol1 Geography examination. This question covers Drainage .

Neco Model Questions Vol1 2025 Geography Essay / Theory

Topic: Drainage

Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2025 • GEOGRAPHY • essay

River X drains a catchment of 2,500 km² situated in a tropical savanna climate. The area receives an average annual rainfall of 1,200 mm, of which 30 % is lost to evapotranspiration. The measured mean discharge at the river outlet is 45 m³ s⁻¹.

Question Parts

( a )

Calculate the total volume of water supplied by rainfall to the catchment in one year and the volume that becomes runoff.

( b )

Using the mean discharge, estimate the annual runoff volume and compare it with the value obtained in part (a). State possible reasons for any discrepancy.

( c )

A small hydro‑electric scheme requires a minimum annual runoff of 1.2 ×10⁹ m³. Based on your calculations, assess the feasibility of the scheme and recommend one measure to increase runoff reliability.

( d )

Explain two ways in which the drainage pattern of the catchment influences the distribution of soil fertility.

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About This Question

This is Neco Model Questions Vol1 2025 Geography Question 8. It is one of the essay questions from the 2025 Neco Model Questions Vol1 Geography examination.

The question covers Drainage .

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