雅鲁藏布江流域NDVI时空分布及与降水量的关系  

SPATIAL-TEMPORAL CHANGES OF NDVI AND THEIR RELATIONS WITH PRECIPITATION IN YARLUNG TSANGPO RIVER BASIN

作　　者：付新峰[1] 杨胜天[2] 刘昌明[1] 

机构地区：[1]北京师范大学水科学研究院 [2]北京师范大学地理学与遥感科学学院遥感科学重点实验室

出　　处：《北京师范大学学报（自然科学版）》2006年第5期539-542,F0003,共5页Journal of Beijing Normal University(Natural Science)

基　　金：国家科技攻关计划资助项目(2005BA901A11);国家自然科学基金资助项目(40561002)

摘　　要：对雅鲁藏布江流域归一化差值植被指数(normalized difference vegetation index,NDVI)时空变化特征分析的同时,把流域站点降水量点数据插值成与流域NDVI相一致的空间Grid数据,并对流域NDVI与降水量的关系进行了分析.考虑到降水量插值误差的存在,分析了流域站点NDVI与降水量的关系.结果表明,流域与流域站点NDVI与降水量均具有较强的季节性与时间上的一致性.其线性相关系数与对数相关系数都在0.7以上.As an index of denoting basin＇s vegetation cover, NDVI （normalized difference vegetation index） is influenced by many climatic factors such as precipitation. In this paper, the spatial-temporal change of NDVI is analyzed in Yarlung Tsangpo River basin. Meanwhile, the point data of basin＇s precipitation are interpolated to spatial grid data in consistence with NDVI data. Then, the relation between NDVI and precipitation is analyzed in the basin. Also, the relation between NDVI and precipitation of the basin＇s stations is analyzed because interpolation errors are considered. The conclusion is that NDVI and precipitation in the basin and of the basin＇s stations are more intensive with season and are in consistency with time. Their linear and logarithmic correlation coefficients are above 0. 7.

关 键 词：归一化差值植被指数 降水量 植被覆盖 雅鲁藏布江流域 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]