北京师范大学学报：自然科学版2011，Vol.47Issue(4)：432-436,5.
渭河流域关中段近30年植被动态变化分析
DYNAMIC CHANGES OF VEGETATION IN GUANZHONG PART OF WEIHE RIVER BASIN IN RECENT 30 YEARS
摘要
Abstract
Dynamic changes in vegetation has important implications for regional ecological systems and environmental change regulations. This study selected five periods of MSS/TM/ETM image data filmed in 1980, 1990, 2000, 2005 and 2007 over the Guanzhong part of Weihe River basin, calculated and extracted NDVI in different periods. Vegetation coverage distributions in 1980 to 2007 were estimated and graded according to the dimidiate pixel model. The spatial distribution of vegetation fraction over Guanzhong region was generated. Growth status of different vegetation types and their spatial difference could be understood in detail by analyzing spatio--temporal change characteristics of NDVI and vegetation coverage in the last 30 years. Data indicated that NDVI and vegetation coverage in the area tended to increase with some fluctuations in the past 30 years, with decline seen in the early 1990s to 2000.关键词
植被动态变化/渭河流域关中段/NDVI/植被覆盖度Key words
dynamic changes of vegetation/Guanzhong part of Weihe River basin/NDVI/vegetation fraction分类
农业科学引用本文复制引用
乔晨,占车生,徐宗学,李玲..渭河流域关中段近30年植被动态变化分析[J].北京师范大学学报：自然科学版,2011,47(4):432-436,5.基金项目
国家水体污染控制与治理科技重大专项资助项目 （）
科技部国际合作资助项目 （）
