基于ETM+影像的千岛湖叶绿素a浓度卫星遥感反演研究  

Inversion of Chlorophyll-a Concentration Based on Satellite Remote Sensing in Qiandao Lake

作　　者：王莹[1] 刘其根[1] 冯权泷 龚建华[2,3] 胡忠军[1] 胡梦红[1] 

机构地区：[1]上海海洋大学农业部水产种质资源与利用重点开放实验室,上海201306 [2]中国科学院遥感与数字地球研究所遥感科学国家重点实验室,北京100101 [3]浙江中科空间信息技术应用研发中心,浙江嘉兴314100

出　　处：《激光生物学报》2015年第5期441-447,共7页Acta Laser Biology Sinica

基　　金：公益性行业(农业)专项"湖泊水库养殖容量及生态增养殖技术研究与示范"(201303056);国家自然科学基金(31072218);上海市高校知识服务平台项目(ZF1206);中欧龙-3计划(10668)

摘　　要：以千岛湖为研究对象,利用Landsat 7 ETM+遥感影像与野外实测数据,建立叶绿素a浓度的遥感定量反演模型。将叶绿素a浓度与波段反射率组合进行Pearson相关性分析,选择(B4+B2)/B3波段组合构建叶绿素a反演模型,并得到千岛湖叶绿素a浓度的时空分布。结果表明:(1)2007年千岛湖叶绿素a浓度低于4μg/L的水体面积占水体总面积达到99%以上,整体水质优良;(2)千岛湖叶绿素a浓度随季节变化特征明显,夏季容易出现局地高值,秋季平均浓度整体升高;(3)通过反演不同时期的叶绿素a浓度分布,可以刻画出千岛湖藻类的消长过程,从空间上发现易爆发富营养化的区域。该反演模型能较为精确地估算千岛湖的叶绿素a浓度,对今后水体富营养化的监测和预警具有重要意义。Taking Qiandao Lake as the research object,the remote sensing quantitative retrieval model of chlorophyll a concentration was established using the Landsat 7 ETM + remote sensing image and field measurement data. Make Pearson correlation analysis of chlorophyll concentration and spectral reflectance combination,select( B4 + B2) / B3 band combination construction of chlorophyll-a retrieval model,and obtain chlorophyll-a concentration of temporal and spatial distribution. Results show that:( 1) in 2007 from Qiandao Lake chlorophyll a concentration below 4 ug / L water area accounted for the total water ara reaches above 99%,the overall good water quality;( 2) chlorophyll-a concentration with characteristics of the seasonal change obviously,the summer to local high value,autumn average concentration of whole body increased.;( 3) by inversion of the distribution of chlorophyll a concentration in different periods,the growth and Octline of the algae in Qiandao Lake can be described. This inversion model can estimate the concentration of chlorophyll a in Qiandao Lake,which is of great significance for the monitoring and early warning of water eutrophication in the future.

关 键 词：千岛湖 叶绿素A 遥感 反演模型 

分 类 号：X87[环境科学与工程—环境工程]