Analysis and Feasibility of Measures to Minimize the Impact of Acid Mine Waters Discharged by Abandoned Copper-Sulphide Mines on Hydrosphere of the Tagil RiverLiudmila Ribnikova and Vera NavolokinaE3S Web Conf., 177 (2020) 04009DOI: https://doi.org/10.1051/e3sconf/202017704009