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引用本文:周立国,冯学智,王春红,王得玉,徐晓雄.太湖蓝藻水华的MODIS卫星监测.湖泊科学,2008,20(2):203-207. DOI:10.18307/2008.0211
ZHOU Liguo,FENG Xuezhi,WANG Chunhong,WANG Deyu,XU Xiaoxiong.Monitoring cyanobacteria bloom based on MODIS data in Lake Taihu. J. Lake Sci.2008,20(2):203-207. DOI:10.18307/2008.0211
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太湖蓝藻水华的MODIS卫星监测
周立国1, 冯学智1, 王春红1, 王得玉1, 徐晓雄2
1.南京大学地理信息科学系, 南京 210093;2.浙江省测绘大队, 杭州 310030
摘要:
本文基于MODIS卫星影像探讨太湖蓝藻水华的识别、监测问题.通过比较MODIS影像上不同蓝藻浓度的波段反射率值的差别,得到对蓝藻信息响应的敏感波段,利用特定波段的合成,可基本识别蓝藻的分布信息,并基于蓝藻的光谱响应特征,采用比值模型方法、进一步确定蓝藻分布的相对浓度信息.最后通过不同时相蓝藻浓度的叠加分析,得出了蓝藻水华的动态变化信息.
关键词:  MODIS数据  蓝藻  监测  太湖
DOI:10.18307/2008.0211
分类号:
基金项目:国家科技支撑计划(2007BAC26801)资助
Monitoring cyanobacteria bloom based on MODIS data in Lake Taihu
ZHOU Liguo1, FENG Xuezhi1, WANG Chunhong1, WANG Deyu1, XU Xiaoxiong2
1.Department of Geographic Information Science, Nanjing University, Nanjing 210093, P. R. China;2.Geological Surveying and Mapping Institute of Zhejiang Province, Hangzhou 310030, P. R. China
Abstract:
This paper discusses the method and mechanism of identifying and monitoring the cyanobacteria bloom based on MODISdata in Lake Taihu. Through the comparison of spectral reflectance value of different cyanobacteria concentration, it can be foundthat several wave bands are sensitive to cyanobacteria. Making use of the color composition, we can get the macroscopic distributioninformation of the cyanobacteria bloom. Furthermore, using the ratio index model, we can further confine the relative content of thecyanobacteria bloom. Finally through overlaying analysis of the cyanobacteria concentration distribution from multi-temporalMODIS data, dynamic changing information of cyanobacteria bloom can be obtained.
Key words:  MODIS data  cyanobacteria  monitoring  Lake Taihu
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