TY JOUR TI THE INFORMATIONAL SUPPORT OF THE NAVIGATION SECURITY AND THE ECOLOGICAL SECURITY IN ZONES OF LIMITED DEPTHS IN THE SYSTEM «RIVER – SEA» BY MATHEMATICAL MODELING KW ecological security KW pollution KW accidental emissions KW motion of viscous liquid JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Molchanov, V.N. PY 2012 IS 2012 PB Saint-Petersburg University of State Fire Service of Emercom of Russia