ИСТИНА

Dissolved organic matter (DOM) is present in all types of natural water. Its typical concentrations in water are low, but the DOM is a significant organic carbon reservoir on the Earth, exceeding the organic matter of all living organisms. Since the DOM of natural origin due to presence of humic substances absorbs UV light and emit luminescence, its spectra are successfully used in solving such important tasks as the control of natural aquatic ecosystems and technological water environments. For the natural aquatic DOM in various types of natural aquatic systems (sea and river, freshwater and relic lakes) such spectral characteristics as the wavelength of the emission maximum in fluorescence spectrum, the fluorescence quantum yield, the spectral dependences of optical density and their higher derivatives are considered.