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New sand stabilization index of sand encroachment around green belts in Gourara, southwest of Algeria

  • Ould Safi MohammedEmail author
  • Haddouche Driss
Original Paper
  • 33 Downloads

Abstract

In the Saharan regions of Algeria, the phenomenon of sand encroachment is the main cause of the degradation of the physical environment as well as the biological resources. It represents an impediment against all forms of socio-economic activities. In the past, fighting sand encroachment in the region of Gourara (southwest of Algeria) was carried out through ancestral processes like fences and small clay walls. Since 2007, this region has witnessed the plantation of several green belts, planted by the forest services as a part of the biological fight against this phenomenon. The present study evaluates the effectiveness of these green belts in the fight against sand encroachment by the application of a new index of sand stabilization (ISS). The calculation of this index is performed with two factors: the rate of recovery and the height of sand accumulations stabilized inside the green belts. In addition, the status of this index was determined by two parameters: the calculated index value and the field of observation. Thus, a positive validation of effectiveness of this index has been found after its application on different cases of green belts. The multivariate analysis (PCA) of 60 sand encroachment surveys on the three studied green belts (BVO, BVD, BVG) enabled to distinguish three groups of surveys, according to both the values recovery rate and the height of sand accumulations. This new index has allowed to represent the sand stabilization situation of each green belt. Thus, three situations were found: weak, average, and strong stabilization.

Keywords

Algeria Gourara Sand encroachment Green belt Socioeconomic 

Notes

Acknowledgments

We thank the national institute of forestry research, forest conservation of the wilaya of Adrar for their logistics. We thank the service of public works of wilaya of Adrar for their technical assistance. Our appreciations are also addressed to Dr. Ameur Ameur Abdelkader for the statistical analysis and Mr. Mehdi for English assistance.

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Laboratory N31, Conservation Management of Water, Soil and Forests Sustainable Mountain Development in the Region of Tlemcen, Department of Forest Resources, Faculty of SNV-STUUniversity of TlemcenTlemcenAlgeria
  2. 2.National Institute of Forestry ResearchAdrar stationAlgeria

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