Capacity of second spillway of Boguchanskaya HPPA. P. Gouriev, N. V. Khanov, V. A. Fartukov, M. I. Zborovskaya and M. M. AbidovE3S Web of Conf., 401 (2023) 01010DOI: https://doi.org/10.1051/e3sconf/202340101010