Estimation of Total Suspended Matter Concentration in Shitoukoumen Reservoir Based on a Semi-empirical Model

Total suspended matter is an important water quality parameter,and it has a bright future for remote sensing to monitor the concentration of TSM.The way to inverse the water quality parameters mainly contains three methods,and the semi-empirical algorithm is applied in this paper.Based on the in situ spectral and TSM concentration in Shitoukoumen reservoir in June 13th,2008,the back-scattering coefficient of TSM is calculated.Also,it needs to select some empirical parameters and optimum wavelength(675 nm).And then,regression algorithm is built between the in situ TSM concentration and back-scattering coefficient with the determination coefficient 0.8327.It is clear that semi-empirical algorithm has more advantages in the inversion precision than empirical one which is based on the remote sensing reflectance,because of the inherent optic parameters involved.Furthermore,it will lead better results in the area which is rich in suspended sediment.