基于FY-3A的海南岛橡胶林台风灾害遥感监测——以“纳沙”台风为例

TY-3A-based remote sensing monitoring of “Nesat” typhoon damage to rubber plantations in Hainan Island

以登陆海南岛的1117号台风"纳沙"为例,根据通过高分辨率卫星数据提取的海南岛橡胶分布范围,利用FY-3A遥感数据分析了台风登陆前、后海南岛橡胶归一化植被指数的变化。借助GIS技术平台,提取受损橡胶的分布信息(INDVI<0)。根据建立的橡胶林台风灾害等级标准,绘制了橡胶林台风灾害损失等级分布图,实现了橡胶林台风灾害的遥感监测。通过遥感监测结果与灾情实际调查结果的对比分析发现,二者总体趋势一致,而遥感监测更加快速、直观、精细,说明橡胶林台风灾害遥感监测是可行的。

On the basis of Hainan island rubber distribution range extracted from high resolution satellite data and taking Hainan Island Landing Nesat typhoon 1117 as an example,the NDVI change of rubber plantations caused by the typhoon ' Nesat' was analyzed using the data of FY-3A.With the help of GIS,the distribution of the rubber plantations which suffered disaster(INDVI< 0) was extracted.Then,according to the grade standard of the rubber plantations typhoon disaster,the loss distribution map of the rubber plantations suffered from typhoon disaster was drawn up and the remote sensing monitoring of rubber plantations typhoon disaster was realized.Contrast analysis of the remote sensing monitoring results and the actual disaster investigation data shows that,the remote sensing monitoring results are in agreement with the disaster investigation data,remote sensing monitoring is quicker,more direct-viewing,more fine than the actual disaster investigation,which means that remote sensing monitoring of the rubber plantations typhoon disaster is feasible.