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摘要： 基于2010年4月在昆承湖采集的野外实验数据,建立了适用于昆承湖的QAA固有光学量反演模型。结果表明:该模型可以得到较高精度的反演结果。所有验证点在411~700 nm波段范围内,反演总吸收系数和实测总吸收系数的决定系数R2都高于0.984,平均相对误差ε都低于14.5%。在440、488和532 nm 3个波段处,总吸收系数反演值和实测值决定系数R2分别为0.655、0.742和0.826,平均相对误差ε分别为6.5%、3.6%和3.4%,精度较高。反演后向散射系数与和参考后向散射系数在440、488和532 nm处均具有较好的相关性,且532 nm处反演后向散射系数与实测总悬浮物浓度决定系数为0.624,呈正相关,反演后向散射系数具有一定的可信度。该模型能够为昆承湖固有光学量的反演提供一条有效途径。 关键词： 昆承湖;  QAA算法;  固有光学量;  总吸收系数;  后向散射系数     Abstract: Absorption and backscattering coefficient are the important inherent optical properties of water and key inputs for bio\|optical model.They are highly related to the concentration of water constituents.Domestic researches on inversion of inherent optical properties are mainly focused on the ocean,but the retrievals of inherent optical properties of inland waters haven’t been paid enough attentions.In this paper,Lee quasi\|analytical algorithm is proposed based on marine water,and is improved to retrieve the inherent optical properties of Kuncheng Lake,which is an inland lake,based on field data collected on April 23,2010.Results show that coefficients of determination of total absorption coefficients R2 are all higher than 0.984 and the average relative errors ε are less than 14.2% for all validated field samples.To further verify the results,comparison between retrieved total absorption values and measured values at wavelengths of 440 nm、488 nm and 532 nm are made,which show fair retrieval accuracy.Coefficients of determination R2 are 0.655,0.742 and 0.826 and the average relative errors ε are 6.5%,3.6% and 3.4%,separately.As for backscattering properties,the retrieval values of backscattering coefficients have high correlation with reference backscattering coefficients at wavelengths of 440 nm,488 nm and 532 nm.Furthermore,the retrieval values of backscattering coefficient have a good relationship with the concentrations of total suspended matter at 532 nm,which prove that the inversion backscatter coefficients have a high level of creditability.The retrieval model established in this paper can provide an efficient approach for inherent optical properties’ retrieval of Kuncheng Lake.

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