Mots-clés
Années 1970 ; Années 1990 ; Biogéographie ; Chine ; Date 2004 ; Dégradation de la végétation ; Formation herbacée ; Image satellite ; Indice de végétation ; Qinghai ; Télédétection ; Variation spatialeBiogeography ; China ; Grassland ; Qinghai ; Remote sensing ; Satellite imagery ; Spatial variation ; Vegetation degradation ; Vegetation index ; Years 1970-79 ; Years 1990-99Grassland degradation in the Three-River Headwaters region, Qinghai Province
Auteur(s) et Affiliation(s)
LIU, J.
Inst. of Geographic Sciences and Natural Resources Research, Beijing, Chine
XU, X.
Inst. of Geographic Sciences and Natural Resources Research, Beijing, Chine
SHAO, Q.
Inst. of Geographic Sciences and Natural Resources Research, Beijing, Chine
Description :
In order to acquire objectively spatial-temporal processes of grassland degradation, MSS images in the mid and late 1970s, TM images in the early 1990s and TM/ETM images in 2004 were used. Grassland degradation in the Three-River Headwaters (TRH) region was interpreted through analysis on RS images in 2 time series, then the spatial and temporal characteristics of grassland degradation in the TRH region were analyzed since the 1970s. Because grassland degradation had obviously regional differences in the TRH region, it could be regionalized into 7 zones, and each zone had different characteristics in type, grade, scale and time process of grassland degradation.
Type de document :
Article de périodique
Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2008, vol. 18, n°. 3, p. 259-273, nombre de pages : 15, Références bibliographiques : 19 ref.
Date :
2008
Editeur :
Pays édition : Chine
Langue :
Anglais
Anglais
Droits :
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Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)