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湖泊科学  2008 

太湖蓝藻水华遥感监测方法

DOI: 10.18307/2008.0202

Keywords: 蓝藻,卫星监测,多源数据,太湖

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Abstract:

利用遥感技术监测太湖蓝藻水华具有重要的现实意义.基于不同遥感数据,包括MODIS/Terra、CBERS-2CCD、ETM和IRS-P6LISS3,结合蓝藻水华光谱特征,采用单波段、波段差值、波段比值等方法,提取不同历史时期太湖蓝藻水华.结果表明:MODIS/Terra数据可以利用判别式Band2>0.1和Band2/Band4>1提取蓝藻水华;CBERS-2CCD、ETM和IRS-P6LISS3数据可以利用Band4大于一定阈值和Band4/Band3>1提取蓝藻水华;波段比值(近红外/红光>1)算法稳定,可以发展成为蓝藻水华遥感提取普适模式.同时,本文成功利用ETM和IRS-P6LISS3数据Band4波段对蓝藻水华空间分布强度进行了五级划分.这为今后利用遥感技术,建立太湖蓝藻水华监测和预警系统奠定了基础.

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