Radiometric colour of natural waters. Dependence on water quality parameters

Utilizing a bio-optical model, numerical experiments have been conducted to the effect of revealing the dependence of radiometric colour of natural wa ter on the concentrations of coexisting colour-producing agents (CPA). The simulation results indicate that both the dominant wavelength and colour pu rity display a strong tendency to a certain 'end-point' with increasing CPA concentrations. This work illustrates that neither panchromatic nor two-ch annel ratio images can provide unambiguous inference of water quality param eters from air- and spaceborne remote sensing data.