Geoecological assessment of the state of water bodies in the Irtysh river basin within the Omsk regionVictoria Nadtochiy, Zhanbolat Tusupbekov, Natalia Ryapolova and Maksat IbraevE3S Web Conf., 411 (2023) 02066DOI: https://doi.org/10.1051/e3sconf/202341102066