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研究水体的辐射传输机理,分析水中叶绿素、悬浮泥沙、耗氧性有机物对入射光的吸收和散射作用,求得遥感数据与水中物质浓度的定量关系,据此推导叶绿素浓度遥感反演模型。针对环境卫星数据进行大气纠正等预处理后应用模型反演新丰江水库的叶绿素浓度,反演结果与实测数据的相关系数为0.94,平均相对误差66.67%,精度较高,由此可知水库库心全年叶绿素浓度较低,库湾地区叶绿素浓度较高,实地考察发现与该地区大量的网箱养殖有关。本文的模型选取多时相数据,综合考虑多种水质因素,采用多波段求解,精度较高。
The radiation transmission mechanism of water body was studied. The absorption and scattering of chlorophyll, suspended sediment and oxygen-consuming organics in water were analyzed. The quantitative relationship between remote sensing data and waterborne matter concentration was obtained. Based on this, the remote sensing model of chlorophyll concentration was deduced. The atmospheric chlorophyll data were corrected for atmospheric conditions and applied to the inversion of chlorophyll concentration in the Xinfengjiang Reservoir. The correlation coefficient between the inversion results and the measured data was 0.94, the average relative error was 66.67%, and the accuracy was high. Therefore, The concentration of chlorophyll in the heart is low throughout the year, and the chlorophyll concentration in the reservoir bay is higher. The field investigation shows that it is related to a large number of cage culture in this area. The model of this paper chooses multi-temporal data, taking into account a variety of water quality factors, multi-band solution, high accuracy.