Neco Model Questions Vol1 2021 Geography Question 8

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

Neco Model Questions Vol1 2021 Geography Essay / Theory

Topic: Drainage

Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2021 • GEOGRAPHY • essay

The River Benue, a major tributary of the Niger River, drains a catchment area of approximately 250 km² in the middle belt of Nigeria. The region receives a mean annual rainfall of 1,200 mm, with 70 % of the rainfall occurring during the wet season (May–October). The runoff coefficient for the catchment is estimated at 0.45, and the average annual evapotranspiration loss is 550 mm. The river exhibits a youthful profile in its upper reaches and a mature profile downstream.

Question Parts

( a )

Calculate the mean annual runoff volume (in million cubic metres) contributed by the catchment to the River Benue.

( b )

Discuss two major implications of the calculated runoff volume for flood management in the downstream towns of Makurdi and Onitsha.

( c )

Compare the characteristics of the youthful upper reaches with the mature downstream section of the River Benue, and explain how these characteristics affect the river’s ability to transport sediment.

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About This Question

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

The question covers Drainage .

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