应用MODIS监测太湖水体叶绿素a浓度季节变化研究  

Determination of Chlorophyll-a Concentration in Taihu Lake Using MODIS Image Data Based on Season Difference

作　　者：王世新[1] 焦云清[1] 周艺[1] 祝令亚[1] 阎福礼[1] 

机构地区：[1]中国科学院遥感应用研究所,北京10010

出　　处：《遥感信息》2008年第1期47-53,共7页Remote Sensing Information

基　　金：国家自然科学基金(40671141);国家863项目(2006AA06Z419)共同资助

摘　　要：以太湖作为实验区,利用波段比值、差值和组合算法讨论了非成像及成像高光谱数据和叶绿素浓度相关性差异和敏感波段分布,在此基础上将不同时段的MODIS影像,不同空间分辨率的波段反射率与叶绿素a浓度实测值进行相关分析,通过回归拟合建立并验证了不同季节的叶绿素a浓度遥感监测模型,并应用模型计算出太湖水体叶绿素a浓度的分布情况,对太湖水质变化进行了评价。研究结果表明,MODIS影像在太湖的水质动态变化监测中是可用的。Based on analyzing the sensitive bands of different wavelengths and the high correlation coefficients with chlorophyll of different algorithms （Ratio ,Difference and Combination）, using the simple and multivariate regression, the semi-empirical models for determining chlorophyll-a（chl-a） concentration in Taihu Lake are developed by relating the different MODIS band combi- nations to chl-a measurements collected in different seasons. Then, the distribution of chl-a concentration in Taihu Lake is mapped,and the different season＇s water state of Taihu Lake is evaluated based on Carlson TSI method. The results of this study show that MODIS image data is useful in water quality monitoring in Taihu Lake.

关 键 词：MODIS影像 叶绿素A 季节变化 模型 太湖 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]