TY JOUR TI METHODICAL APPROACHES TO FORECASTING THE ENVIRONMENT IN CASE OF ACCIDENTS (DESTRUCTIONS) ON CHEMICALLY HAZARDOUS OBJECTS KW emergency chemically hazardous substance KW chemically hazardous facility KW chemical accident KW chemical environment KW forecasting KW complex programs special software JO NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) AU Voropaev, N.P. PY 2016 IS 2016 PB Saint-Petersburg University of State Fire Service of Emercom of Russia