Hot Deserts: Desertification & Management

Desertification is the process by which fertile land becomes desert. It is one of the most significant environmental challenges facing the world today, affecting the lives of hundreds of millions of people. For AQA GCSE Geography, you need to understand the causes, impacts, and management strategies for desertification, with reference to specific case studies.

---

What Is Desertification?

Desertification is the degradation of land in arid, semi-arid, and dry sub-humid areas, caused primarily by human activities and climate change. It is not the expansion of existing deserts — it is the creation of desert-like conditions in areas that were previously productive.

Key facts:

• Desertification threatens approximately one-third of the Earth's land surface
• It affects an estimated 250 million people directly
• Over 12 million hectares of productive land are lost to desertification each year
• The most severely affected regions are in sub-Saharan Africa (the Sahel), but it also occurs in Central Asia, the Middle East, Australia, and southern Europe

---

Where Does Desertification Occur?

Desertification is most common on the margins (edges) of existing hot deserts, where the climate is already marginal for farming and vegetation: