TY JOUR TI Features of safe operation of the Kuchuk hydroelectric complex under the influence of aggressive waters KW hydraulic structures KW aggressive waters KW saline waters KW concrete corrosion KW sulfate corrosion KW ground penetrating radar KW concrete quality factor KW residual service life JO Melioration and Water Management AU Kupriyanov, D.E. AU Pilipenko, T.V. AU Efremenko, D.A. AU Glistin, M.V. PY 2026 IS 2026 PB ANO Editorial Board Melioration and water management