TY JOUR TI Mathematical modeling riverbeds software remote sensing data and ecological safety of the timber floating for medium and small rivers KW ecology KW river KW riverbed KW mathematical model KW remote sensing KW timber rafting. JO Actual directions of scientific researches of the XXI century: theory and practice AU Posypanov, S.V. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov