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太湖、巢湖水体总悬浮物浓度半分析反演模型构建及其适用性评价
引用本文:刘忠华,李云梅,檀静,郭宇龙,周莉,刘阁.太湖、巢湖水体总悬浮物浓度半分析反演模型构建及其适用性评价[J].环境科学,2012,33(9):3000-3008.
作者姓名:刘忠华  李云梅  檀静  郭宇龙  周莉  刘阁
作者单位:南京师范大学地理科学学院, 虚拟地理环境教育部重点实验室, 南京 210046;南京师范大学地理科学学院, 虚拟地理环境教育部重点实验室, 南京 210046;南京师范大学地理科学学院, 虚拟地理环境教育部重点实验室, 南京 210046;南京师范大学地理科学学院, 虚拟地理环境教育部重点实验室, 南京 210046;南京师范大学地理科学学院, 虚拟地理环境教育部重点实验室, 南京 210046;南京师范大学地理科学学院, 虚拟地理环境教育部重点实验室, 南京 210046
基金项目:高分辨率对地观测系统国家科技重大专项(E0203/1112/JC01);江苏省2011年度普通高校研究生科研创新计划立项项目(CXLX11_0875);江苏省高校自然科学研究重大项目(11KJA170003);江苏高校优势学科建设工程项目(1411109012)
摘    要:总悬浮物浓度是水体重要的水质参数.本研究利用太湖春季、秋季和巢湖夏季多期野外实测数据,通过对生物光学模型进行合理的简化构建适用于太湖、巢湖水体总悬浮物浓度反演的半分析模型,并将该模型应用于MERIS和环境一号卫星高光谱卫星影像上以验证该方法的适用性.结果表明:①针对太湖和巢湖水体,总悬浮物浓度最优反演波段范围为730~832nm(氧气吸收带除外);②针对MERIS数据,波段10(中心波长754 nm)和波段12(中心波长779 nm)均适用于太湖总悬浮物浓度反演,而波段11(中心波长761 nm)由于氧气吸收带的影响不适用于总悬浮物浓度反演;③针对太湖MERIS数据,模型反演结果的相对误差基本上呈现出随距离卫星过境时间增大而逐渐增加的趋势,在卫星过境时间正负3 h内测量的样点,模型反演结果的相对误差均在50%以内,而时间差超过3 h,相对误差则逐渐增大到50%以上;④环境一号卫星高光谱数据17个波段(B83~B99)均能够对巢湖总悬浮物浓度进行较好的反演,其反演效果要好于MERIS数据在太湖的反演结果.

关 键 词:半分析模型  MERIS数据  环境一号卫星高光谱数据  总悬浮物  太湖  巢湖
收稿时间:2011/11/16 0:00:00
修稿时间:2012/1/12 0:00:00

Construction of Semi-analytical Model for Inversing Total Suspended Matter in Lake Taihu and Chaohu and Assessment of Its Applicability
LIU Zhong-hu,LI Yun-mei,TAN Jing,GUO Yu-long,ZHOU Li and LIU Ge.Construction of Semi-analytical Model for Inversing Total Suspended Matter in Lake Taihu and Chaohu and Assessment of Its Applicability[J].Chinese Journal of Environmental Science,2012,33(9):3000-3008.
Authors:LIU Zhong-hu  LI Yun-mei  TAN Jing  GUO Yu-long  ZHOU Li and LIU Ge
Institution:Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China;Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China
Abstract:Total suspended matter is an important water quality parameter. Firstly, a semi-analytical model for inversing concentration of total suspended matter was constructed by simplifying the bio-optical model, using the in-situ data of Lake Taihu in spring and autumn and that of Lake Chaohu in summer. And then, its applicability was validated by MERIS and HJ-1 HSI data. The results showed that: 1 The optical range for inversing total suspended matter in Lake Taihu and Chaohu was between 730 nm and 832 nm except the oxygen absorption bands. 2 According to MERIS data, bands centered at 754 nm and 779 nm were both suitable for inversing total suspended matter in Lake Taihu whereas the band centered at 761 nm was not suitable due to the influence of oxygen absorption. 3 According to MERIS data, the relative error of this model increased with the time difference after satellite transit time. The relative errors of inversion results of this model were below 50% when the time difference was less than 3 hours, while they increased to more than 50% when the time difference exceeded 3 hours. 4 The seventeen bands of HJ-1 HSI data were all suitable for inversing total suspended matter in Lake Chaohu and its result was better than that in Lake Taihu using MERIS data.
Keywords:semi-analytical model  MERIS data  HJ-1 HSI data  total suspended matter  Lake Taihu  Lake Chaohu
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