Temporal and spatial patterns of forest fires(2001-2020)in Nandan County of Guangxi and their relationship with topographic and meteorological factors
Aiming to understand the temporal and spatial distribution and effective factors of forest fire occurrence,and to optimize the allocation of fire prevention and suppression resources,determined variations of forest fire number and burned area by using time series analysis,defined characteristics of forest fire and composition of fire sources for different types of forests,and analyzed the relationship of forest fire occurrence with topographic and meteorological factors in Nandan County of Guangxi for the period from 2001 to 2020.The results showed that:(1)most of the major forest fires occurred from 2001 to 2008,while forest fires occurred in period from 2009 to 2020 were generally in common level.80%of the forest fires concentrated in January to April,distributing in a northwest-southeast directed area with dense transportation and aggregated population of central Nandan County.(2)Shrubs and barren mountains were more prone to be suffered by forest fires.Though forest fire number were less in Pinus massoniana forests,Cunninghamia lanceolata forests and Eucalyptus robusta forests,their burned forest area were larger.In different types of forests,artificial productive and non-productive use of fire were the main fire sources for forest fires.(3)Forest fires were affected by topographic and meteorological factors.Even though forest fire occurred in a low risk area,it could spread widely under ineffective control.(4)Forest fire number and burned area displayed weak correlation with meteorological indices,but factor analysis showed that distinct dominant meteorological factors in different year resulted in annual variation of forest fires.Therefore,based on the local characteristics of forest fire and accurately mastering of climate changes,Nandan government should strengthen the management and monitoring forces to prevent the occurrence of forest fire,and should develop scientific fire management and firefighting strategies to deal with forest fire better.
forest firetemporal and spatial patterntopographymeteorological factor
NETL
NSTL
万方数据
