摘要
以太湖作为实验区,将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,在此基础上通过回归拟合建立遥感监测模型,并应用模型计算出太湖水体叶绿素a浓度的分布情况,对太湖水质进行了评价。研究结果表明,MODIS影像在太湖的水质监测中是可用的,其中250m分辨率波段1、2的比值组合r2/r1与叶绿素a浓度实测值高度相关(R=0.903),适于用来反演叶绿素a浓度。
Using the simple regression and multivariate regression, the semi-empirical models for determimating chlorophyll-a （chl-a） concentration in Taihu Lake are developed by relating the different MODIS band combinations to chl-a measurements. Then, the distribution of chl-a concentration in Taihu Lake is mapped, and the trophic 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. The ratio of band2 to band1 （r2/r1） with 250m resolution is suitable to retrieve chl-a concentration because it is well related with chl-a measurements （R = 0. 903）.
出处
《遥感信息》
CSCD
2006年第2期25-28,共4页
Remote Sensing Information
基金
中国科学院知识创新工程重要方向性项目(KZCX3-SW-334)
