基于遥感数据的鄱阳湖水体后向散射系数反演

Retrieving Backscattering Coefficient of Water Body in Poyang Lake using Remote Sensing Data

水体后向散射系数是水体的重要光学特性之一,也是水质生物光学反演模型的重要参数之一,对其研究具有重要意义。利用2010年10月鄱阳湖实测水体后向散射系数、吸收系数和遥感光谱数据,建立基于生物光学模型的水体后向散射系数反演模型（420 nm,470 nm,510 nm,590 nm和700 nm）,模型校准和验证阶段的决定系数分别为0.739-0.866和0.684-0.827,RMSE基本上均小于0.4。结果表明光谱数据和生物光学模型在反演鄱阳湖水体后向散射系数具有很大的潜力。

Backscattering coefficient is one of the important water optical properties, and it is also an important inputting parameter deriving water quality bio-optical model. This study aimed to establish the water backscattering coefficient inversion model（420,470,510,590 and 700nm） using bio-optical model combined with the backscattering coefficient,absorption coefficient and remote sensing data in Poyang lake in October of 2010. The results showed that：the determination coefficients of models in calibration and validation ranged from 0. 739 to 0. 866 and from 0. 684 to 0. 827, respectively, and the RMSE values were mostly less than 0.4. We concluded that remote sensing data and bio-opticat model held great potential in retrieving backscattering coefficient of water body in Poyang Lake.