Algeria's Green Dam: Fighting Desertification for Decades

In the early 1970s, Algeria embarked on a significant forestry experiment known as the Green Dam. This ambitious project established a vast belt of trees and vegetation across the country's semi-arid high plateaus. Its primary goal was to create a living barrier to slow desertification and safeguard land situated between the Mediterranean coast and the Sahara Desert.

The initiative began in 1971 to restore a landscape suffering from severe degradation. Forest cover had drastically decreased over the preceding century, while soil erosion, drought, and overgrazing threatened agricultural and pastoral lands. The Green Dam aimed to address these issues through reforestation and improved land management.

Stretching approximately 1,500 kilometers from east to west and 20 kilometers from north to south, the project spanned 13 provinces. Initially, Aleppo pine was the primary species planted to stabilize soils and reduce erosion. However, its objectives expanded to encompass broader land restoration, including dune fixation and water resource improvement.

Over time, the Green Dam evolved beyond simple tree planting. By the 1990s, it integrated with wider efforts for forest preservation and watershed management. The strategy now emphasizes the importance of protecting existing vegetation, managing grazing, and selecting species suited to local conditions, proving that large-scale reforestation, combined with effective land management, can successfully rehabilitate vulnerable semi-arid landscapes.