Bioregion
Sahel
Also known as: Sahelian belt, the Sahel
The semi-arid transitional belt across northern Africa between the Sahara desert to the north and the Sudanian savanna to the south — running roughly 5,400 km from the Atlantic coast of Senegal and Mauritania, through Mali, Burkina Faso, Niger, Chad, and into Sudan and Eritrea. Rainfall is seasonal and unreliable (200–600 mm per year), the dry season runs eight to ten months, and the soils are fragile, sandy, and prone to wind erosion. The Sahel is one of Earth's most climatically stressed agricultural regions and one of its most agroecologically consequential: a working agroecology for the Sahel is a working agroecology for a substantial fraction of the world's future climate. The region is also the canonical proving ground for Pierre Rabhi's francophone-African agroecology training work (1970s–2010s); for the broader **Great Green Wall** initiative (2007–, an African Union project to reestablish a 8,000 km belt of restored vegetation across the southern Sahara edge); and for the Yacouba Sawadogo / zaï pit / Farmer-Managed Natural Regeneration (FMNR) tradition of dryland restoration.
Practical
The Sahel runs across the following countries (west to east): Senegal · Mauritania · Mali · Burkina Faso · Niger · Nigeria (northern) · Chad · Sudan · South Sudan · Eritrea · (and reaches the Red Sea coast).
Population: roughly 100 million people, predominantly rural and smallholder agricultural. Climate is hot semi-arid (BSh in the Köppen classification). The single rainy season runs roughly June through September; the rest of the year is dry. Average rainfall ranges from about 200 mm/year on the northern (Saharan) edge to about 600 mm/year on the southern (Sudanian) edge — both ranges that make conventional rain-fed agriculture marginal at best.
The principal agricultural realities:
- [[millet|Pearl millet]], [[sorghum|sorghum]], fonio, cowpea are the staple Indigenous crops. They are drought-tolerant in ways that wheat, rice, and maize are not. Most Sahelian food security still depends on these crops despite decades of Green-Revolution-style push toward maize.
- Pastoralism is structurally integrated — Fulani, Tuareg, and other pastoralist peoples move livestock across the bioregion seasonally, which is one of the principal historical methods of converting marginal vegetation into food.
- [[soil-erosion|Soil erosion]] and degradation are acute. Wind erosion in the dry season, sheet erosion in the brief intense wet season, and the steady advance of the Sahara at the northern edge have caused substantial land loss over the past five decades.
- Climate change is hitting the Sahel particularly hard. Rainfall variability is increasing; the rainy season is shortening; some climate models project the region as among the most stressed under 2°C+ warming.
Cultural
Three working responses to Sahelian conditions deserve specific note:
1. The zaï pit tradition. A small planting pit (roughly 30 cm wide, 20 cm deep), dug in the dry season, filled with organic matter (manure, compost, household waste), and planted with millet or [[sorghum|sorghum]] at the start of the rains. The pit concentrates water, nutrients, and microbial activity in a small zone where the seedling can establish even on degraded land. The technique is traditional in parts of Burkina Faso; Yacouba Sawadogo, a Burkinabé farmer, refined and propagated it from the 1980s onward and has now restored an estimated tens of thousands of hectares of degraded land across the southern Sahel. Sawadogo received the Right Livelihood Award in 2018.
2. Farmer-Managed Natural Regeneration (FMNR). Smallholder farmers selectively protect and prune naturally-regenerating tree seedlings on their fields rather than clearing them. The result, across millions of hectares of Niger and Burkina Faso since the 1980s, is a measurable greening of the southern Sahel visible from satellite — sometimes called the “Niger miracle.” The technique is essentially free (it requires no purchased inputs) and works at smallholder scale.
3. [[pierre-rabhi|Pierre Rabhi]]‘s adapted agroecology, which we cover in detail at [[pierre-rabhi|Rabhi’s author page]]: forty years of training Sahelian smallholder farmers in rainwater harvesting, soil-cover management, polyculture, locally-adapted seed, and household-scale food sovereignty.
4. The Great Green Wall. Announced by the African Union in 2007, the [[great-green-wall|Great Green Wall]] is an ambitious initiative to restore a continuous belt of vegetation across the southern Sahara edge — 8,000 km from Senegal to Djibouti. The project has had a complicated history (its early framing as a literal wall of trees was scientifically naive and largely failed; its later reframing as a mosaic of region-appropriate restoration techniques, including zaï and FMNR, has had more success) but the overall trajectory is real and important.
Why the Sahel matters to 0mn1.one
The Sahel is one of the bioregions where 0mn1.one’s [[mission-district-sf|mission]] applies most starkly. Worldwide abundance for all forms of life is, in this region, a near-term question of survival rather than a long-term aspiration: the Sahel’s agriculture has to work, on existing land, under worsening climate conditions, for one of the world’s largest and youngest rural populations. The wiki should treat the Sahel as a high-priority future bioregion ingest target, with [[pierre-rabhi|Rabhi]], Sawadogo, the FMNR tradition, and the Great Green Wall as the principal anchor figures.
See also
Auto-generated from this entry’s typed relations: frontmatter, grouped by relation type so the editorial signal isn’t flattened.
- Shares approach with: [[agroecology]] · [[indigenous-foodways]]
- Member of: [[bioregion]]
- Practice of: [[pierre-rabhi]]
- Kin of: [[great-green-wall]]
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