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| 基于MODIS植被指数的太湖蓝藻信息提取方法研究 | |
| 引用本文： | 李亚春,孙佳丽,谢志清,谢小萍.基于MODIS植被指数的太湖蓝藻信息提取方法研究[J].气象科学,2011,31(6):737-741. |
| 作者姓名： | 李亚春 孙佳丽 谢志清 谢小萍 |
| 作者单位： | 1. 江苏省气象台,南京,210008 2. 江苏省气候中心,南京,210008 3. 江苏省气象科学研究所,南京,210008 |
| 基金项目： | 中国气象局新技术推广项目(CMAT2007M30) |
| 摘 要： | 有效地提取蓝藻水华信息对分析蓝藻动态分布有重要意义,而卫星遥感技术是进行太湖水质监测与保护的措施之一.本文以2007年7月25日Terra/MODIS数据为主要数据源,用比值植被指数(Irv)、归一化植被指数(Indv)和增强型植被指数(Iev),研究提取太湖蓝藻信息.结果表明:植被指数可以有效提取遥感影像中的蓝藻水华信息,其中Indv是应用效果较好的植被指数之一；在掩膜处理后,用Indv提取了太湖蓝藻的面积分布信息,效果较好；此外,选取Indv为测试变量,利用决策树分类法,有效地把蓝藻水华高浓度覆盖区、中浓度覆盖区和轻浓度覆盖区分开来,为准确掌握太湖蓝藻发生、发展趋势和发生程度提供可靠信息. |
| 关 键 词： | 蓝藻 植被指数 决策树 |
| 收稿时间： | 2010/10/20 0:00:00 |
Extraction methods of cyanobacteria bloom in Lake Tai based on MODIS vegetation index |
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| LI Yachun,SUN Jiali,XIE Zhiqing and XIE Xiaoping.Extraction methods of cyanobacteria bloom in Lake Tai based on MODIS vegetation index[J].Scientia Meteorologica Sinica,2011,31(6):737-741. | |
| Authors: | LI Yachun SUN Jiali XIE Zhiqing and XIE Xiaoping |
| Affiliation: | LI Yachun1 SUN Jiali2 XIE Zhiqing3 XIE Xiaoping1(1 Jiangsu Meteorological Observatory,Nanjing 210008,China,2 Jiangsu Climate Centre,3 Jiangsu Meteorological Institute,China) |
| Abstract: | It is very important to extract the information of cyanobacteria bloom-forming in order to analyze the distribution of cyanobacteria bloom,and remote sensing is one of measures of monitoring and protecting water quality in Lake Tai.In this paper,Terra/MODIS data of July 25,2007 were selected as a main data source.The information of cyanobacteria bloom was extracted by three kinds of MODIS vegetation index(Irv,Indv and Iev).The results showed that these vegetation index methods were able to get cyanobacteria... |
| Keywords: | Cyanobacteria bloom Vegetation index Decision tree |
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