水土保持通报2011，Vol.31Issue(5)：204-207,229,5.
青海省都兰县NDVI变化及影响因子研究
Variations and Impact Factors of NDVI in Dulan County of Qinghai Province
摘要
Abstract
The knowledge of vegetation cover changes will provide considerable insights into the dynamic process of desertification.The study illustrated the vegetation dynamic changes in Dulan County,Qinghai Province using 2000—2009 MODIS NDVI data,and on this basis,the relationship between NDVI changes with temperature and rainfall variations were investigated,providing the basic data to land use planning in alpine areas and desertification prevention and control.The results indicate that the NDVI values of the area presented a slow ascendant trend from 2000 to 2009,at the rate of 0.002 9/a.The NDVI values had a strong seasonal changes in a year,but the overall NDVIs were not high for the county,with the maximum value of 0.22.The vegetation condition were improved significantly in 39.71% of the area of the entire county,which mainly located in basins of Chacha river and Chahanwusu river and a large area of Qaidam river downstream.However,the vegetation degeneration was found in the upper and middle reaches of Qaidam river,accounting for 17.74% of the entire county,suggesting that the desertification control should be further strengthened.The temperature and rainfall were the two main natural factors influencing the NDVI dynamics of the county;the NDVIs correlated strongly significantly with the temperature（p0.01）,and significantly with the rainfall amount（p0.05） from May to September annually.The impact of the temperature on the NDVI was stronger than that of the precipitation.关键词
青海省都兰县/NDVI/降水/气温Key words
Dulan County of Qinghai Province/NDVI/precipitation/temperature分类
信息技术与安全科学引用本文复制引用
常进,张克斌,边振,程中秋,王黎黎,肖红霞..青海省都兰县NDVI变化及影响因子研究[J].水土保持通报,2011,31(5):204-207,229,5.基金项目
国家“十一五”科技支撑项目“青海省高寒沙地退化植被恢复技术研究与试验示范（都兰）” （）
