| 基于光谱分类的太湖水体后向散射研究 |
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| 引用本文： | 陆超平,吕恒,李云梅.基于光谱分类的太湖水体后向散射研究[J].遥感学报,2012,16(2):417-434. |
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| 作者姓名： | 陆超平 吕恒 李云梅 |
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| 作者单位： | 南京师范大学 虚拟地理环境教育部重点实验室, 江苏 南京 210046;南京师范大学 虚拟地理环境教育部重点实验室, 江苏 南京 210046;南京师范大学 虚拟地理环境教育部重点实验室, 江苏 南京 210046 |
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| 基金项目： | 国家自然科学基金(编号:40701136,40971215);国家水环境遥感技术体系研究与示范(编号:2009ZX07527-006);江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 由于时空变化而产生的水体后向散射系数参数化差异一直是影响水质参数遥感定量反演精度的一个重要因素。在对太湖遥感反射率光谱进行分类的基础上,针对影响太湖水体水色的不同主导因子,把太湖水体分为3种类型,分别利用半分析方法和光学闭合原理对后向散射系数进行模拟,在此基础上研究其光学特性及其与水体组分浓度的关系,最后针对3种不同主导类型的水体分别建立了后向散射系数参数化模型。将后向散射特性在不同时间和空间上的差异转化为水体不同主导因子在生物-光学上的差异,从而得到适用于太湖不同湖区及不同季节的后向散射系数参数化模型,为利用分析方法对太湖水质参数进行更为精确的遥感反演提供了基础。
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| 关 键 词： | 太湖 光谱分类 半分析方法 光学闭合原理 后向散射系数 |
| 收稿时间： | 2011/2/21 0:00:00 |
| 修稿时间： | 2011/4/18 0:00:00 |
Backscattering properties and parametric model of Taihu Lakebased on spectral classification |
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| LU Chaoping,LV Heng and LI Yunmei.Backscattering properties and parametric model of Taihu Lakebased on spectral classification[J].Journal of Remote Sensing,2012,16(2):417-434. |
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| Authors: | LU Chaoping LV Heng and LI Yunmei |
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| Institution: | Key Laboratory of Virtual Geographic Environment Ministry of Education, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment Ministry of Education, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment Ministry of Education, Nanjing Normal University, Nanjing 210046, China |
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| Abstract: | The parameters of backscattering coefficient model have significant temporal and spatial variability. In order to overcomethis limit, a classification algorithm based on spectra dominant factors for Taihu Lake is established to classify the waterreflectance spectra into three types. Quasi-analytical algorithm and optical closure are used in this paper to stimulate the backscatteringcoefficient for three types of water reflectance spectra in Taihu Lake according to the field measurement reflectancedata. The properties of backscattering coefficient are also analyzed synchronously. On this basics, the backscattering coefficientparametric model for three types of water in Taihu Lake are established. As a result, the difference of the backscattering propertiesin different time and space is converted into the difference of bio-optical properties of dominant factor in water. Thus, theparametric models of backscattering coefficient are demonstrated to be suitable for different parts and different seasons of TaihuLake. |
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| Keywords: | Taihu Lake Spectral Classification Quasi-analytical algorithm Optical closure Backscattering coefficient |
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