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Shihezi University (石河子大学) 2021

Vegetation Change Trend and Its Response to Key Ecological Factors in Junggar Basin

杜秉晨曦

Titre : Vegetation Change Trend and Its Response to Key Ecological Factors in Junggar Basin

Auteur : 杜秉晨曦

Grade : Master 2021

Université : Shihezi University (石河子大学)

Résumé partiel
Junggar Basin,as the main geographical unit in northern of Xinjiang,its environmental changes will affect the ecological environment changes in the northern of Xinjiang.Vegetation index,as an important index to measure regional ecological environment,directly reflects the ecological status of Junggar Basin.In this paper,remote sensing data,ENVI and GIS software are used to analyze the temporal and spatial variation of normalized difference vegetation index(NDVI)in Junggar Basin,to understand the characteristics of NDVI changes in the basin,and to describe the key ecological factors affecting vegetation changes in the basin.In this study,the remote sensing image data of MOD09A1,the surface temperature data of MOD11B3,the land classification data of MCD12Q1 and the precipitation data of TRMM in the growing season from 2002 to 2019 were used.The trend changes of NDVI,soil salinity,soil moisture,surface temperature,precipitation and human factors in growing season and the correlation between NDVI and the above key ecological factors were analyzed by numerical synthesis,Mann—Kendall trend analysis,Hurst trend analysis and correlation analysis.Finally,the contribution rate of each factor to the change of NDVI in the basin was calculated by geographic detect

Mots clés : vegetation ;ecological factor ;trend analysis ;correlation analysis ;contribution rate analysis ;

Présentation (CNKI)

Page publiée le 7 mars 2022