NDLI: The vegetation damage assessment of the Wenchuan earthquake of May 2008 using remote sensing and GIS

Content Provider	Springer Nature Link
Author	Yang, Cunjian Ren, Xiaolan Huang, He
Copyright Year	2011
Abstract	The methodology for assessing the vegetation damaged by the Wenchuan earthquake by using the technologies of remote sensing and GIS was discussed in Dujiangyan city of Sichuan Province, China. The model of extracting vegetation from CBERS images was formulated using the differentiation knowledge of vegetation and non-vegetation discovered by image analysis and geographic analysis. The damage degree index (DDI) of the vegetation was defined here, which was the difference of the normalized difference vegetation index before the earthquake and that after earthquake. The China-Brazil Earth Resource Satellite (CBERS)-02’s images acquired, respectively, on 6 May and 27 June 2008, the model of extracting vegetation, and DDI were used to obtain the information about the area and degree of the damage vegetation in the study. There was 87.94 square kilometers vegetation damaged by Wenchuan earthquake, which accounted for 7.9% of the total area in Dujiangyan city. The area percentage of the damage vegetation in each grade related strongly and positively to the elevation grade and slope grade and weakly related to the aspect type. The distribution characteristics of the damage vegetation were useful for making plan of restoring vegetation here.
Starting Page	45
Ending Page	55
Page Count	11
File Format	PDF
ISSN	0921030X
Journal	Natural Hazards
Volume Number	62
Issue Number	1
e-ISSN	15730840
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-11-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Damage vegetation Wenchuan earthquake Remote sensing Natural Hazards Environmental Management Civil Engineering Geotechnical Engineering & Applied Earth Sciences Hydrogeology Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science Water Science and Technology

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