Barrage vert

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The barrage vert

As Barrage vert (German:, green barrier, Green Dam ', Arabic: السد الأخضر, As-Sadd al-Akhdhar ) is a reforestation project in northern Algeria called, whose aim is the spread of the Sahara to stop -Wüste north and to be revised in part. It is one of the largest re-greening measures against desertification worldwide.

The project began in 1974, initially primarily to protect the Transsaharienne (Trans-Sahara Route) from silting up. By the degradation of Halfa - grass steppe the project to a comprehensive land protection measure. It has continued to this day with varying degrees of intensity and varying degrees of success.

The sub-Saharan belt in the isohyets is covered by 300 millimeters of precipitation north and 200 millimeters south, a total of around 3 million hectares . Over a length of around 1,500 kilometers from the Moroccan to the Tunisian border, a reforested strip at least 20–40 kilometers wide is to be created. By the mid-2000s, more than half a million hectares had been planted.

Aleppo pine and cork oak trees are mainly used for afforestation .

literature

  • Agence nationale des forêts ANF (ed.): Le barrage vert: bilan et perspective. Alger, 1990.
  • Sahraoui Bensaid. Bilan critique du barrage vert en Algérie. In: Sécheresse Vol. 6, No. 3 (2005), pp. 247-255 ( abstract , link to pdf, alger-roi.fr, accessed April 4, 2016).
  • Merdasa Saifi, Nouara Boulghobra, Lakhdaria Fattoum: The Green Dam in Algeria as a tool to combat desertification. In: Global Risk Forum GRF Davos: Planet @ Risk Vol. 3, No. 1 (Davos, 2015), pp. 68–71 ( online , planet-risk.org) - with a map of the reforestation area.

Individual evidence

  1. ↑ a b Klaus Koch: With computers against sand. The simulation of shifting dunes is intended to help combat the spread of deserts. In: Neue Zürcher Zeitung , January 1, 2006 ( online ).
  2. ↑ cf. Lit. Saifi, Boulghobra, Fattoum 2015, Chapter 2.2 Main steps of Realization.
  3. ↑ a b Lit. Bensaid, 2005, Figure 1, 2; Information according to Saifi, Boulghobra, Fattoum 2015, Section 2.
  4. ↑ Mourad M. Belaaz: Le barrage vert en tant que patrimoine naturel national et moyen de lutte contre la desertification. FAO Document 0301-B3 , undated ( online , fao.org).
  5. ↑ A billion trees will be used - 'Green dam' may keep Sahara at bay. German press agency. In: The Montreal Gazette , June 1, 1983, pp. I-2 ( news.google.com ).
  6. ^ The "Green Dam". In: Algeria Guide onA (algeria-guide.blogspot.de).

Coordinates: 35 ° 30 ′ 0 ″  N , 4 ° 0 ′ 0 ″  E