Characteristics of water quality of the Amur river near Khabarovsk in May-June 2019

Hydrochemical and microbiological researches of water quality in the Amur River near Khabarovsk were carried out during the period of spring low water and floods in May-June 2019. The lowest content of biogenic and organic substances was defined in the period of low water, and the highest - at the peak of the flood, when organic substances came mostly from the Bureya, Bira and Songhua rivers. That was also confirmed by the increase in the number of ecological-trophic groups of bacteria in their waters. Mineral forms of nitrogen at the peak of the flood came mainly with the waters of the rivers Sungari and Ussuri. Significant precipitation contributed to the flow of volatile aromatic hydrocarbons in the Amur with surface runoff.