Combustibility of Surface Fuels in Major Forest Types Around Kunming

Through the field surveying of 6 major forest types and the sampling of surface fuels in the Yunnan Forest Nature Center around Kunming, the simulated burning experiments of surface fuels were carried out in the laboratory and the characters of fire behavior were calculated, including the igniting time, flame maintenance time, flameless combustion maintenance time, spread time, flame height and length, flame temperature, flameless combustion temperature, flame heat radiation, flameless combustion heat radiation and fire intensity. The results showed that for uphill fire or downhill fire, based on the study for fire intensity from different types of fuels, the order of combustion of fuels from strong to weak is: Pinus yunnanensis (98.61 kW/m), Cupressus duclouxiana (48.34 kW/m), the young forest of P. armandii (44.09 kW/m), P. armandii (19.72 kW/m), Quercus variabilis (4.13 kW/m), Cryptomeria fortunei and Cupressus cashmeriana are flameless state. For the same fuels, the fire intensity of the uphill fire is greater than that of the downhill fire. The study can provide reference for forest fuels and fire management, fire risk zoning in Kunming region.