Abstract:

Artificial fire source is a key factor causing the forest fire. Understanding the spatial-temporal distribution of fire sources helps to realize the fire sources management. It is a basis work for forest fire ecological prevention. The author took 2001-2008 data in Hunan for the example, based on variation coefficient, Gini’s coefficient and concentration index to analyze the trends of regional difference, zonal centralizations and regional distribution of artificial fire sources on forest fires. The result showed that: they were of the same spatial distribution trends with 3 indexes. It showed the fluctuation trend: in particular, for recently 3 years, the upward trend of nonproductive fire sources was very clear. The following conclusions were drawn: the difference and zone centralizations among regions in Hunan on artificial fire sources were obvious. The trend showed that the forest fire was affected by natural regulation and human regulation. The difference among regions was enlarged and zone centralizations strengthen of unproductive fire sources for recent years to reflect the large influence of human society activities on forest fires. Forest fires mainly happened in Shaoyang, Changsha and Yongzhou.