Sahel

The Sahel is an ecological zone stretching across Africa from east to west, lying between the Sahara Desert to the north and the wetter savanna to the south. The name comes from the Arabic word 'saahil', meaning coast—as if the Sahara were viewed as a dry sea with the Sahel as its shore.

The region is semi-arid: rainfall is seasonal, lasting only a few months in summer, and vegetation consists mainly of grassland and scattered trees such as acacia. Human life depends on pastoralism and rain-fed agriculture. Year-to-year variation in rainfall is the most critical factor in livelihood planning.

Geography

The Sahel passes through countries including Mauritania, Mali, Burkina Faso, Niger, Chad, and Sudan, and also touches parts of Senegal and Nigeria. The boundary of the Sahel is not a sharp line but rather a gradual transition where annual rainfall decreases as one moves north. The Niger River and Lake Chad have created water-rich areas where populations concentrate.

Rainfall and drought

Sahel rainfall depends on the north-south movement of the Intertropical Convergence Zone. When this system fails to advance sufficiently northward, the rainy season is shortened. In the latter half of the twentieth century, the Sahel experienced prolonged droughts lasting many years, causing livestock losses and human displacement. The term 'desertification' is used to describe declining land productivity, including overgrazing and deforestation.

History and society

The Sahel was for centuries a trade route crossing the Sahara, linking North Africa and West Africa. Empires such as Ghana, Mali, and Songhai built their power on control of gold, salt, and trade routes. Islam spread along these same routes, and many languages spoken in the region—Hausa, Fulfulde, Songhay, Kanuri, and Arabic—belong to the Sahel belt.

Current situation

Since the 2010s, parts of central Sahel—particularly Mali, Burkina Faso, and Niger—have experienced armed conflict involving armed groups, state forces, and local militias. The region has also seen military coups in several countries. Economic challenges related to water, land scarcity, and rising population are intertwined with security concerns.