TY JOUR TI BASIC PROVISIONS IN MODEL DEVELOPMENT IN THE CURRENT OF OPEN WATER STREAMS KW boundary value problem KW free spreading KW hydraulic structures KW water flow KW mathematical model KW plane of velocity hodograph JO Construction and Architecture AU Kochanenko, V.N. AU Aleksandrova, M.S. AU Kondratenko, A.I. PY 2021 IS 9 PB Publishing Center RIOR