%0 Journal Article %T Analysis and Assessment of the Quality of Surface Waters in the Priozersky District of the Leningrad Region %A Harlamova, A.V. %A Belova, P.A. %K Water body, surface waters, pollution, hydrochemical indicator, integral quality indicator, water body pollution index, specific combinatorial pollution index, trophic state index, water quality class %J Proceedings of Petersburg Transport University %D 2023 %N 20 %P 9 %I FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"