TY JOUR TI Different ways to reduce the threats of emergency situations on ownerless hydraulic structures KW water object KW hydraulic structure KW safety KW ownerless structure KW spillway KW survey JO Melioration and Water Management AU Yurchenko, A.N. AU Britvin, S.O. PY 2022 IS 2022 PB ANO Editorial Board Melioration and water management