%0 Journal Article %T Differential equations for calculating the time of reformation multi raft %A Chetverikova, I.. %A Skripets, A.. %K differential equation system, water delivery, raft, stage of reorganization %J Actual directions of scientific researches of the XXI century: theory and practice %D 2014 %N 2 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov