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FOREST RESOURCES WANAGEMENT ›› 2017›› Issue (4): 50-58.doi: 10.13466/j.cnki.lyzygl.2017.04.009

• Scientific Research • Previous Articles     Next Articles

Research on the Forest Fire Susceptibility Spatial Distribution of Voronoi and Conditional Entropy

XIE Shaofeng1(), OUYANG Junxiang2, XIAO Huashun1   

  1. 1. Central South University of Forestry and Technology,Changsha 410004,China
    2. Academy of Forest Inventory and Planning,SFA,Beijing 100714,China
  • Received:2017-05-06 Revised:2017-06-14 Online:2017-08-28 Published:2020-09-24

Abstract:

According to the fire historical data of Guangzhou,the paper analyzes the fire time,distribution range,ignition factors,relationship with tree species and terrain,and creates forest fire voronoi,and then using voronoi polygon area,shortest distance between the road and fire,elevation,slope and forest stand types,establishes the fire conditional entropy. Finally,it used the inverse distance weighting method to spatial interpolation and divided forest fire susceptive zones into high incidence,frequently occurring,general,accidental and no fire zones.The zones reflect spatial distribution rule of the forest fire,the forestry management can effectively prevent and control the occurrence of forest fires,minimize fire losses.The results show that forest fire happens from October to April of following year.Forest fire is closely related to road,forest stand types,the terrain factors,distribution in low hill zone near the road and upslope,coniferous forest and coniferous mixed forest fire occurred more frequently by human factors.Non-stability fires spatial distribution,high incidence and frequently occurring zone present the patchy gathered accounted for 4.23 percent,accidental zone reflects the fire characteristics of sudden and randomness accounted for 52.96 percent.

Key words: spatial distribution of forest fire, conditional entropy, forest fire susceptibility

CLC Number: