TY JOUR TI Models for predicting the spread of landscape grass-roots fires in steppe zones KW landscape grassland fire KW steppe fire KW propagation modeling KW forecasting KW unmanned aircraft systems KW satellite monitoring KW fire hazard JO Siberian Fire and Rescue Bulletin AU Mongush, R.O. AU Shubin, A.A. PY 2026 IS 0 PB FSBEE HE Siberian Fire and Rescue Academy EMERCOM of Russia