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Scientia Silvae Sinicae ›› 2021, Vol. 57 ›› Issue (6): 115-124.doi: 10.11707/j.1001-7488.20210613

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Spatial and Temporal Distribution of Forest Fires (Frequency and Area) Caused by Three Main Fire Sources in Heilongjiang Province

Sainan Yin,Dongchang Wang,Yanlong Shan*,Xiyue Han,Bo Gao,Mingxia Wang   

  1. Forestry College of Beihua University Jilin 132013
  • Received:2019-10-30 Online:2021-06-25 Published:2021-08-06
  • Contact: Yanlong Shan

Abstract:

Objective: In this study,the temporal and spatial patterns of forest fires caused by lightning,agricultural fire and smoking fire were analyzed based on the historical data of forest fires in Heilongjiang Province,which would provide scientific basis for management of forest fires in this area. Method: Based on the data of forest fires in Heilongjiang Province from 1997-2017, the temporal variations of three fire sources were analyzed respectively. The differences of the total fire areas caused by three fire sources in different months and days were analyzed by two factor analysis of variance. The spatial distribution patterns of three fire sources were analyzed by multi distance spatial clustering analysis (Ripley's K function). Result: From 1997 to 2017, the forest fires caused by lightning fire were the most frequent and harmful among the forest fires in Heilongjiang Province,and the number of the occurence increased in recent years. Lightning fire occurred mainly in Daxing'anling area,and most frequently in June and July. However,the average area of forest fires caused by lightning was the largest from 16:00-16:59 in September every year. The frequency and total area of the other two forest fires (caused by agricultural fire and field smoking) mainly occurred in April and May,showing a fluctuating decline from 1997-2017. The agricultural fire-caused maximum forest fires (average area) annually occurred from 12:00-12:59 in June and from 16:00-16:59 in September. However,there was no difference in the total area of fire sites caused by smoking fire over months and days in the field,indicating that fire prevention should be focused on the fire source in the time of high frequency and high degree of harm. From the perspective of space,agricultural fire mainly occurred in Heihe municipal district,Nenjiang County,sunke County and Qitaihe City; smoking fire mainly in Songling Forestry Bureau,Jiagedaqi Forestry Bureau,Xunke County,Jiayin County,Qitaihe City and Jidong County. Conclusion: With the gradual strengthening of fire source control,forest fire monitoring and fighting capacity in Heilongjiang Province,a total area of forest fires (including lightning,field smoking and agricultural fire) has decreased significantly in recent years compared with that before. Most of the forest fires occur in spring and summer. The forest fires caused by the three fire sources are mainly concentrated in Daxing'anling area in the northwest,Heihe and Yichun in the North and Qitaihe in the southeast.

Key words: Heilongjiang Province, forest fire source, temporal change, spatial pattern

CLC Number: