Neco 2023 Geography Question 8

Practice essay / theory question 8 from the 2023 Neco Geography examination. This question covers Drainage .

Neco 2023 Geography Essay / Theory

Topic: Drainage

Question 8 NECO • 2023 • GEOGRAPHY • essay

The drainage basin of the River Zambe in central Nigeria has the following characteristics: - The source of the river is at an elevation of 850 m above sea level. - The river mouth, where it joins a larger river, is at 150 m above sea level. - The total length of the river from source to mouth is 120 km. - The basin exhibits a dendritic drainage pattern and the soils are predominantly lateritic. - Seasonal rainfall averages 800 mm, but intense thunderstorms can produce flash floods. Answer the questions below:

( a )

Define the following terms as they apply to river basins: (i) drainage basin, (ii) dendritic pattern, (iii) lateritic soil.

( b )

Calculate the average gradient (slope) of the River Zambe expressed as a percentage.

( c )

Explain how the dendritic drainage pattern and the presence of lateritic soils influence the fertility of the floodplain soils in the basin.

( d )

Propose two practical measures that local authorities could adopt to reduce the risk of flash‑flood damage in the River Zambe basin.

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This is Neco 2023 Geography Question 8. It is one of the essay questions from the 2023 Neco Geography examination.

The question covers Drainage .

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