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《春季太湖叶绿素a浓度的光谱估算与分析评价》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第卷第期遥感信息274Vol.27No.4,年月20128REMOTE SENSING INFORMATIONAug.,2012 春季太湖叶绿素a浓度的光谱估算与分析评价孙绍杰,田庆久,包颖,张玉超,田家①①①②③南京大学国际地球系统科学研究所,南京南京大学环境学院,南京(;;210093210093①②南京大学电子科学与工程学院,南京③210093)摘要年月日于太湖梅梁湾和湖心区域进行光谱数据采集,同步水质理化分析数据得到叶绿素:2011327a浓度区间为。基于较低叶绿素浓度水平的实测光谱数据及同步的理化分析数据分别采4.99L~31.06agg//Lμμ用二波段模型、光
2、谱反射率一阶微分模型、反射峰位置模型、三波段模型和四波段模型对梅梁湾和湖心区域的叶绿素浓度进行建模遥感估算个模型的回归分析结果对应2分别为和a5R0.7750.8110.7860.8260.846。,,,,分别为和。并针对春季较低叶绿素浓度水平下的RMSE4.02L3.52L3.82L3.44L3.24La/,/,/,// ggggg μμμμμ光谱估算模型在应用价值和精度方面做了比较评价。关键词:太湖;叶绿素;光谱反射率;蓝藻;水华adoi10.3969j.issn.1000-3177.2012.04.005:/中图分类号文献标识码文章编号:::()TP79 A 10
3、00-31772012122-0028-06Estimation and Evaluation of Chlorophyll-a Concentrationin Taihu Lake in Spring①①①②③ SUN Shao-jieTIAN Qing-jiuBAO YingZHANG Yu-chaoTIAN Jia,,,,(,,;①International Institute for Earth System ScienceNanjing UniversityNanjing210093②School of the EnvironmentNanjing Univer
4、sityNanjing210093,,;③School of Electronic Science and EngineeringNanjing UniversityNanjing210093,,)thAbstractBased on the data collected in the Meiliang bay and central region in Taihu Lake on March 27we obtained:,,2011the hyperspectral reflectance and chlorophyll-a concentration data.The
5、concentration of chlorophyll-a of the 54sampling pointsvaries from 4.99L.By using the two-band-modelfirst-derivative methodreflectance peak position methodgL to 31.05g//,,,μμthree-band-model and four-band-modelthe concentration of the chlorophyll-a was estimatedand concentration was relati
6、vely,,2low.The result Rcounterparts are 0.7750.826and 0.846respectively.The RMSE between measured and esti-,,,0.8110.786mated chlorophyll-a concentration by using the model is 4.02gggL and 3.24gL respectively./,/,/,//L3.52L3.82L3.44gμμμμμFinally we discussed the 5models by analyzing and ma
7、king a comparison between the estimation precision and application abilityusing remote sensing images.Key words:;;;;Taihu Lakechlorophyll-aspectral reflectancecyanobacteriabloom引言1 体的富营养化。太湖是我国第三大淡水湖,又是我国最大的存在严重蓝藻水华的湖泊,是国务院指定目前,我国内陆湖泊面临的一个主要问题是水重点治理的富营养化水域之一。
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