TY JOUR TI ANALYSIS OF THE CONDITION AND CHARACTERISTICS OF HYDRAULIC STRUCTURES IN THE TOTSKY DISTRICT OF THE ORENBURG REGION KW dam KW land reclamation KW safety KW abandoned hydraulic structures KW visual inspection JO Science & World AU Bulgakov, D.V. AU Kashtanov, V.V. AU Medvedeva, A.A. PY 2025 IS 0 PB LLC "Perspektiva"