Approaches to assessment of the total nitrogen and phosphorus inflow into the Neva Bay using the example of the Krasnenkaya River and the Dudergofskiy ChannelStepan Klubov, Victor Tretyakov, Vasiliy Dmitriev and Anna NikulinaE3S Web Conf., 555 (2024) 01004DOI: https://doi.org/10.1051/e3sconf/202455501004