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The article presents the outputs of researches on determination of permissible input of biogenic matter to water bodies with different types of moderate and slowed water exchange: that is phytoplankton, phytoplankton/macrophyte, and macrophyte types. We have shown that the permissible input of biogenic matter to water bodies with moderate and slowed water exchange should be determined with the focus on their actually registered trophic level and its permissible changes appointed depending on the types of this water bodies use. Determination of the admissible increase of the total phosphorous inflow to water bodies of phytoplankton, phytoplankton/macrophyte and macrophyte types is to be done through determination of the permissible, from the point of view of the water user, increase of either the biomass or the phytoplankton, or the supreme aquatic vegetation. The author gives the equations for determination of the permissible inflow of the total phosphorous to phytoplankton, phytoplankton/macrophyte and macrophyte water bodies

The authors have recommended the sequence of actions to realize the Federal project «Preservation of unique water bodies» as a component of the National project «Ecology». We have presented practical recommendations concerning measures aimed at the federal project realization, a standard list of actions and a toolbox for assessment of the water bodies’ ecological safety. We have demonstrated a possibility of the unificated approach to studying the dynamics of the basic indicator of anthropogenic load in order to assess the watercourses quality (dynamics along the river flow) and water bodies (dynamics in time) taking into account local and diffuse negative impacts. The standardization areas that are to compensate deficiencies in nature/protective legislation.