Two methods have been used for solving the inverse problem of remote sensing in case of turbid coastal an inland waters. Color indices are elaborated for estimation of Secchi depth, chlorophyll, yellow substance, suspended matter and total phosphorus concentrations and mean beam attenuation coefficient using passive optical remote sensing data. The second method is spectral modeling. A simple mathematical model is elaborated for simulating the diffuse reflectance spectra beneath and just above the water surface.
"Optical inverse problem in turbid waters", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); doi: 10.1117/12.266488; https://doi.org/10.1117/12.266488