Dispersion of conservative impurities in rivers: implications for compliance with environmental standardsAbdulkhakim Salokhiddinov, Andrey Savitsky, Poshoazimkhon Khakimova and Olga AshirovaE3S Web of Conf., 401 (2023) 02029DOI: https://doi.org/10.1051/e3sconf/202340102029