近年来,中国沿海近岸二类水体中的赤潮频发,对海洋环境、社会经济和公众健康都造成较大危害,因此,针对近岸二类水体中较小范围赤潮的遥感监测分析有重要意义。本文的工作主要集中在:(1)分析典型赤潮海水、泥沙浑浊海水、赤潮泥沙混合海...近年来,中国沿海近岸二类水体中的赤潮频发,对海洋环境、社会经济和公众健康都造成较大危害,因此,针对近岸二类水体中较小范围赤潮的遥感监测分析有重要意义。本文的工作主要集中在:(1)分析典型赤潮海水、泥沙浑浊海水、赤潮泥沙混合海水,以及清洁海水的MOD IS影像光谱特征;(2)分析叶绿素a法,温度法,荧光法和波段比值法,在近岸小范围赤潮识别应用中的优势和缺点;(3)提出监督分类的赤潮信息提取方法,其中典型赤潮样本的选取基于蓝绿波段反射率比值和MOD IS 1,4,3波段。利用本方法,对珠江口海域2006年2月赤潮进行了提取,取得良好的效果。展开更多
[Objective] The aim was to extract red tide information in Haizhou Bay on the basis of multi-source remote sensing data.[Method] Red tide in Haizhou Bay was studied based on multi-source remote sensing data,such as IR...[Objective] The aim was to extract red tide information in Haizhou Bay on the basis of multi-source remote sensing data.[Method] Red tide in Haizhou Bay was studied based on multi-source remote sensing data,such as IRS-P6 data on October 8,2005,Landsat 5-TM data on May 20,2006,MODIS 1B data on October 6,2006 and HY-1B second-grade data on April 22,2009,which were firstly preprocessed through geometric correction,atmospheric correction,image resizing and so on.At the same time,the synchronous environment monitoring data of red tide water were acquired.Then,band ratio method,chlorophyll-a concentration method and secondary filtering method were adopted to extract red tide information.[Result] On October 8,2005,the area of red tide was about 20.0 km2 in Haizhou Bay.There was no red tide in Haizhou bay on May 20,2006.On October 6,2006,large areas of red tide occurred in Haizhou bay,with area of 436.5 km2.On April 22,2009,red tide scattered in Haizhou bay,and its area was about 10.8 km2.[Conclusion] The research would provide technical ideas for the environmental monitoring department of Lianyungang to implement red tide forecast and warning effectively.展开更多
文摘近年来,中国沿海近岸二类水体中的赤潮频发,对海洋环境、社会经济和公众健康都造成较大危害,因此,针对近岸二类水体中较小范围赤潮的遥感监测分析有重要意义。本文的工作主要集中在:(1)分析典型赤潮海水、泥沙浑浊海水、赤潮泥沙混合海水,以及清洁海水的MOD IS影像光谱特征;(2)分析叶绿素a法,温度法,荧光法和波段比值法,在近岸小范围赤潮识别应用中的优势和缺点;(3)提出监督分类的赤潮信息提取方法,其中典型赤潮样本的选取基于蓝绿波段反射率比值和MOD IS 1,4,3波段。利用本方法,对珠江口海域2006年2月赤潮进行了提取,取得良好的效果。
基金Supported by Science and Technology Project of Lianyungang City(SH0917)
文摘[Objective] The aim was to extract red tide information in Haizhou Bay on the basis of multi-source remote sensing data.[Method] Red tide in Haizhou Bay was studied based on multi-source remote sensing data,such as IRS-P6 data on October 8,2005,Landsat 5-TM data on May 20,2006,MODIS 1B data on October 6,2006 and HY-1B second-grade data on April 22,2009,which were firstly preprocessed through geometric correction,atmospheric correction,image resizing and so on.At the same time,the synchronous environment monitoring data of red tide water were acquired.Then,band ratio method,chlorophyll-a concentration method and secondary filtering method were adopted to extract red tide information.[Result] On October 8,2005,the area of red tide was about 20.0 km2 in Haizhou Bay.There was no red tide in Haizhou bay on May 20,2006.On October 6,2006,large areas of red tide occurred in Haizhou bay,with area of 436.5 km2.On April 22,2009,red tide scattered in Haizhou bay,and its area was about 10.8 km2.[Conclusion] The research would provide technical ideas for the environmental monitoring department of Lianyungang to implement red tide forecast and warning effectively.
