TY JOUR TI FORECASTING DAILY WATER LEVELS OF THE PUR RIVER FOR THE NAVIGATION PERIOD BASED ON TRANSFORMER NEURAL NETWORKS KW water level regime KW forecasting KW the Pur River KW transformer neural networks KW navigation safety JO Problems of risk management in the technosphere AU Volkova, N.A. PY 2026 IS 2026 PB Saint-Petersburg University of State Fire Service of Emercom of Russia