Wind erosion and deposition — KCSE Geography

KCSE Geography · 40 practice questions · 4 syllabus objectives

14 easy14 medium12 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Explain the processes of wind erosion (deflation, abrasion, attrition) and describe the landforms produced (yardangs, zeugen, mushroom rocks)

Describe the landforms of wind deposition: barchans, seif dunes, longitudinal dunes, loess deposits; give examples from East Africa

Identify regions in Kenya and East Africa affected by wind erosion and explain the economic consequences

Wind erosion and deposition

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easySHORT ANSWER4 marks

Define two regions in Kenya affected by wind erosion and explain one economic consequence of this erosion in each region. (4 marks)

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Part (a) — 2 marks

Northern Kenya (e.g., Turkana County) (1 mk)

Eastern Kenya (e.g., Garissa County) (1 mk)

Part (b) — 2 marks

Reduced agricultural productivity in Turkana due to loss of topsoil (1 mk)

Increased costs of reforestation and land rehabilitation in Garissa (1 mk)

easySHORT ANSWER4 marks

State three types of wind deposition landforms and provide one example of each from East Africa. (4 marks)

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Part (a) — 3 marks

Barchans (1 mk)

Seif dunes (1 mk)

Loess deposits (1 mk)

Part (b) — 1 mark

Barchans in the Magadi area, Seif dunes in the Kajiado region, and Loess deposits in the Central Highlands (1 mk)

easySHORT ANSWER3 marks

State two characteristics of barchan dunes and give one example from East Africa. (3 marks)

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Part (a) — 2 marks

Barchan dunes are crescent-shaped with the tips pointing downwind (1 mk)

They are formed in areas with limited sand supply and strong winds (1 mk)

Part (b) — 1 mark

The Barchans of the Chalbi Desert in Kenya (1 mk)

State two effects of wind erosion on desert landscapes and name two landforms produced by wind deposition. (6 marks)