Étude diachronique des changements du couvert végétal dans un écosystème montagneux par télédétection spatiale : cas des monts du Tessala (Algérie occidentale)

Physio-Géo. Géographie physique et environnement

Zerey, Wael El¹  Bouiadjra, Salah Eddine Bachir¹  Benabdeli, Khéloufi¹ 

关键词: Algérie;    télédétection;    couvert végétal;    régression;    NDVI;    monts du Tessala;    Algeria;    remote sensing;    plant cover;    Tessala mountains;   

DOI  :  10.4000/physio-geo.2048

学科分类：自然科学（综合）

来源: Revues.org

【 摘 要 】

A better understanding of the changing patterns of land use and land cover, is a major concern for countries where ecosystems are being severely degraded. Indeed, the dynamic feature of land use has important implications on natural resources. Our study conducted on the Tessala mountains, by using Normalized Difference Vegetation Index (NDVI), put in evidence the importance of changes in vegetation cover between 1987 and 2007. A pronounced regressive evolution is observed in south-east and north-west of the Tessala mountains, especially in the "forest of Tessala", in the communes of Aïn-Thrid, Tessala and Sehala. The main factors of environmental degradation, are : deforestation (over 26 offenses cut every year), overgrazing (420 crimes of illegal grazing every year), forest fires (more than 20 fires every year) and resultant erosion (more than 72 % of the area is concerned and mainly in the south-east).

【 授权许可】

Unknown