Waec Model Questions Vol1 2020 Geography Question 8

Practice essay / theory question 8 from the 2020 Waec Model Questions Vol1 Geography examination. This question covers Drainage .

Waec Model Questions Vol1 2020 Geography Essay / Theory

Topic: Drainage

Question 8 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • GEOGRAPHY • essay

The River Gombe basin in the middle belt of Nigeria covers an area of 1 200 km². Within the basin there are 48 km of permanent streams, 72 km of intermittent streams and 30 km of artificial drainage channels. The underlying geology consists of Precambrian gneiss in the upper catchment and Cretaceous sandstones in the lower catchment. The climate is tropical savanna with a distinct wet season lasting 6 months.

Question Parts

( a )

Calculate the drainage density of the basin (in km km⁻²) using all types of streams, and comment on what the value indicates about the basin’s runoff characteristics.

( b )

Explain how the contrasting geology (gneiss vs. sandstone) influences the observed drainage pattern and density in the upper and lower parts of the basin.

( c )

A rapidly growing town is situated on the floodplain of the River Gombe. Propose a sustainable drainage system (SDS) for the town, outlining two key components and justifying how they reduce flood risk and protect water quality.

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About This Question

This is Waec Model Questions Vol1 2020 Geography Question 8. It is one of the essay questions from the 2020 Waec Model Questions Vol1 Geography examination.

The question covers Drainage .

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