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总悬浮物(TSM)是水质遥感反演的重要参数之一,以遥感技术为手段监测总悬浮物浓度成为未来发展的趋势。利用2008年6月13日在石头口门水库采集的高光谱数据和实验室分析数据,计算得到水体总悬浮物的后向散射系数,并经相关分析,选取675 nm处的后向散射系数建立总悬浮物浓度的反演模型,决定系数为0.8327。与基于遥感反射率的经验方法比较,半分析方法具有一定的物理意义,反演精度更高,且在悬浮泥沙含量较高的区域效果更佳。
Total suspended solids (TSM) is one of the most important parameters for the retrieval of water quality remote sensing. Monitoring the concentration of total suspended solids by means of remote sensing technology has become the trend of future development. Using the hyperspectral data and laboratory analysis data collected at Shitoukoumen Reservoir on June 13, 2008, the backscattering coefficients of total suspended solids in water were calculated and the correlation coefficients were established by the backscattering coefficient at 675 nm The inversion model of total suspended matter concentration, the determination coefficient of 0.8327. Compared with the empirical method based on remote sensing reflectance, the semi-analytical method has certain physical meaning, higher inversion accuracy and better effect in the areas with high suspended sediment content.