Construction of suspended solids model of Baiyangdian based on spectral characteristic parameters

To explore how the concentration of suspended solids affects the spectral characteristics and what quantitative relationship exists between them. We selected the Baiyangdian as the study area, this paper synchronously collects sampling points' spectral and water quality data. It establishes the quantitative relationship between suspended solids concentration and spectral reflectance combined with laboratory simulation experiments to realize the suspended solids inversion model. The separability of suspended solids in Baiyangdian water is studied by analyzing variance, and the separability band interval is selected. The laboratory simulation experiment mechanism analysis is used to verify whether the interval range is reasonable. The Pearson correlation coefficient method determines the band with an enormous correlation difference in this interval for combination, and the optimal inversion model is constructed. The results show that the separability band range of water reflectance and suspended solids concentration is 376-1326nm, and the sensitive band with the highest positive and negative correlation between normalized water reflectance and suspended solids concentration is 760nm and 491nm. The water suspended solids concentration inversion model is constructed after combining the two bands. The research shows that the inversion model of the sinusoidal curve fitting model has a good effect, and the coefficient of determination of equation fitting can reach 81%.