Gce Model Questions Vol1 2021 Geography Question 8

Practice essay / theory question 8 from the 2021 Gce Model Questions Vol1 Geography examination. This question covers Drainage .

Gce Model Questions Vol1 2021 Geography Essay / Theory

Topic: Drainage

Question 8 GCE_MODEL_QUESTIONS_VOL1 • 2021 • GEOGRAPHY • essay

The Niger River basin in northern Nigeria is characterised by the following data: - Source elevation: 800 m above sea level - Mouth elevation: 200 m above sea level - River length (measured along the main channel): 120 km - Mean annual rainfall over the catchment: 1500 mm - Catchment area: 2500 km² - Upper catchment lithology: resistant granite - Lower catchment lithology: soft shale - Recent land‑use change: extensive deforestation for timber and agriculture.

Question Parts

( a )

Classify the drainage pattern exhibited by the river and justify your classification using the given lithological and topographic information.

( b )

Calculate the average gradient of the river expressed as (i) metres per kilometre and (ii) as a percentage. Show all steps.

( c )

Discuss the likely impacts of the recent deforestation on the river’s runoff, sediment load and flood risk.

( d )

Propose two integrated river‑basin management measures that could mitigate the adverse effects identified in part (c), explaining how each measure addresses the problem.

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About This Question

This is Gce Model Questions Vol1 2021 Geography Question 8. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Geography examination.

The question covers Drainage .

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