Gce Model Questions Vol1 2023 Geography Question 8

Practice essay / theory question 8 from the 2023 Gce Model Questions Vol1 Geography examination. This question covers Drainage .

Gce Model Questions Vol1 2023 Geography Essay / Theory

Topic: Drainage

Question 8 GCE_MODEL_QUESTIONS_VOL1 • 2023 • GEOGRAPHY • essay

The Benue River basin in central Nigeria has the following characteristics: total river length 300 km, source elevation 600 m above sea level, mouth elevation 0 m, average discharge 150 m³ s⁻¹, average channel width 80 m and average depth 3 m.

Question Parts

( a )

Explain how the longitudinal gradient of the river influences its velocity, erosion and sediment transport.

( b )

Using the data provided, calculate: (i) the average longitudinal gradient expressed as metres per kilometre and as a percentage; (ii) the average flow velocity assuming a rectangular cross‑section; (iii) the approximate time taken for a water parcel to travel from the source to the mouth.

( c )

Discuss two major flood‑risk implications of the drainage characteristics of the Benue basin and recommend one structural and one non‑structural management measure for each implication.

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About This Question

This is Gce Model Questions Vol1 2023 Geography Question 8. It is one of the essay questions from the 2023 Gce Model Questions Vol1 Geography examination.

The question covers Drainage .

View More Gce Model Questions Vol1 2023 Geography Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

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