基于FY-3的海南岛橡胶NDVI时空变化规律研究

Rubber NDVI space-time change law based on FY-3in Hainan

为了研究海南橡胶的生长态势,分析橡胶的归一化植被指数的变化规律,选取海南岛2008—2011年的FY-3A MERSI遥感进行去噪处理,运用风云三号遥感系统和ENVI得到相关数据,将遥感数据结合最大合成法分析橡胶的空间分布特征、年内及年际变化规律,得到海南岛橡胶年生长周期及变化规律.结论表明在2009—2012年四年间海南岛90%以上的橡胶NDVI值均保持在0.6以上,平均值呈现日益增加的趋势,每年2月和8月为极小值和极大值,2—8月为增长趋势,8—10月为下降趋势,10—11月有小幅度的增长,11月至次年2月呈下降趋势.

The study of the growth situation of Hainan rubber and the analysis of the change rule of normalized difference vegetation index of rubber in Hainan were reported in this paper .FY-3A MERSI data from 2008 to 2011 were acquired .The related data was obtained by the use of the 3 remote sensing system and ENVI .Analyzed the spatial distribution characteristics of rubber ,years and interannual variation law through the maximum synthesis and got the rubber annual grow th cycle and change rule in Hainan .The conclusion showed that from 2009 to 2012 ,90% or more rubber were kept at value above 0 .6 in Hainan ,average presented the increasing trend ：the value in February and August for the minimum and maximum ,from February to August as the grow th trend ,from August to October as the downward trend ,there was a small amplitude from October to November ,and then a downward trend from November to the next February in Hainan .