Estimation of the Variability of Average Annual Values of Nutrients Concentrations in the Water of the Kuibyshev Reservoir

Abstract

© 2020 IOP Publishing Ltd. All rights reserved. The results of the analysis of water pollution in the Kuibyshev reservoir with nutrients for the period 2009-2015 yrs are given. The assessment of the dynamics of average annual concentrations of biogenic substances and comparison with fisheries standards was carried out. The trends of average annual concentrations of biogenic substances in the water of the Kuibyshev reservoir are obtained, describing the general trend of the dynamics of biogenic substances for the studied period of time. The analysis of the changes in the chemical composition of the nutrient elements of the waters of the Kuibyshev reservoir in retrospective years from 1957 - 2015 yrs was carried out. In the modern period of 2009-2015 yrs marked a significant increase compared with 1952-1954 yrs the concentrations of the main biogenic substances - phosphate ions - 6,3 times, nitrite ions - 35,0 times, nitrate ions - 15,6 times, and ammonium ions 23,0 times.