| This paper takes the potential fire behavior of Yingpan Forest Farm of Taihang State-Owned Forestry Administration as the research object,taking the combustible load measurement algorithm,the potential fire behavior analysis method,the geographic data processing method,the topographic feature extraction method and the fire zone width measurement method as the research method,to the combustible load,the combustible material heat value and the combustible in the woodland.The spatial pattern of the objects,the speed of fire spread,the intensity of the fire line and the height of the flame are estimated,and the overall layout of the fire zone of the forest farm is determined according to the characteristics of highway,forest edge,slope,ridge line,wind speed and wind direction,in order to provide some reference for the related researchThe results showed that:1.combustible materials,flammable materials in litter layer and three kinds of combustibles in shrub layer constitute the total amount of effective combustibles.The total load of effective combustibles in the coniferous forest is the 14.09(t/hm2)mixed forest in the 7.14(t/hm2)broadleaf forest as the 18.38(t/hm2)sparse forest.The height of shrub layer,herbaceous layer and under branch of 2.coniferous forest is 148.0cm,17.0cm,230.2cm:in order of X115.3cm,27.1cm,199.8cm;broad-leaved forest in turn;the order of mixed forest is 141.2cm,2.9 cm,141.2cm sparse woodland is126.1cm,51.3cm,279.8cm in turn.3.simulation results show that the flame height is usually not greater than 10cm,the flame height of the surface fire is within the range of0.37-2.50m,and the crown fire is within the range of1.75-13.4m,and the gap between the two is larger.The average maximum wind speed of 4.years is x,and the fire line strength of the crown fire calculated under the wind speed is3214-189002KJ/ms.Under this condition,the effective width of the fireproof forest belt is x,and the maximum annual wind speed is 3.04-6.45m.The fire line strength of the crown fire calculated under the wind speed is2165-1916410KJ/ms,and the fireproof forest belt under this condition is effective width.The total length of the network planned in this paper is 6816m,of which the fireproof highway is 6329.5m,the fireproof belt of the forest edge is 3448.3m,and the 038.2m long ridge fireproof belt.These belts are divided into a different size area.The maximum value is 4.26hm2,the average value is 41.24hm2,the network density is 52.5m/hm2,and the proportion of the forest area 7.35%in the area of the whole forest area. |
