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浙江省森林火灾时空特征及其与气象因子的关系

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  • NETL
  • NSTL
  • 万方数据
利用2010-2017年的逐日气象数据和浙江省森林火灾数据，选择其中1 263次森林火灾事件，对发生森林火灾站点的各个气象要素进行合成分析，研究了浙江省森林火灾在时间演变和空间分布上的特征及其与气象因子之间的联系。结果表明，在时间上，浙江省森林火灾主要发生在1-4月，发生频次和过火面积均随时间呈振荡下降趋势，其中2011年发生森林火灾频次最多，为433次，火场总面积4 708 hm2，烧荒烧炭(457次)和上坟烧纸(502次)是浙江省森林火灾发生的主要原因;在空间上，温州、丽水、台州的森林火灾发生频次最高。森林火灾发生与 日降水量、相对湿度呈反相关，与 日最高气温、风速、轻旱或无旱条件下的连续无降水日数呈正相关。进一步分析表明，连续无降水日数对应函数值对森林火险气象指数贡献最大。
Temporal and spatial pattern of forest fire in Zhejiang and its relationship with meteorological factors
Based on the data of forest fires and daily meteorological statistics during 2010-2017 in Zhejiang province,choosing 1 263 forest fire events,and to propose analysis-by-synthesis approach for study on the temporal and spatial pattern of the forest fires and relationship between each meteorological element with forest fire events,the results show that in terms of time,forest fires mainly occurred in Zhejiang province from January to April,and the frequency and area of fire showed an oscillating downward trend.Among them,forest fires occurred most frequently in 2011,433 times,with a total fire area of 4 708 hm2.The fires that occurred in Zhejiang province were dominated by larger fires.The main causes of forest fire were farming burning(457 times)and sacrificial burning(502 times).On the spatial distribution,occurrence of forest fire appears most frequently in Wenzhou,Lishui and Taizhou.The occurrence of forest fires is inversely correlated with daily precipitation and relative humidity,and positively correlated with temperature,wind speed and the number of consecutive precipitation-free-day under the condition of light drought.Further analysis shows that the number of consecutive precipitation-free-day contributes most to the index of forest fire danger during forest fire events in Zhejiang province.

forest firetemperaturethe number of consecutive precipitation-free-day under the condition of light droughtrelative humiditywind speedforest fire danger index

张露萱、张加易、郑芊彤、潘娅英

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浙江省气象服务中心,浙江杭州 310017

森林火灾 气温 轻旱或无旱条件下连续无降水日数 相对湿度 风速 森林火险气象指数

浙江省气象局重点研发项目浙江省科技厅公益技术项目

2019ZD09LGF21D050001

2024

林业建设
中国林业工程建设协会 国家林业局昆明勘察设计院

林业建设

影响因子：0.323
ISSN：1006-6918
年,卷(期)：2024.42(2)
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