Application of CI Index in Spring Forest Fire Warning Service in Daxinganling Mountain Area
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Abstract:
Selecting the ∑CI (CI: Comprehensive meteorological drought Index) of the summer autumn, March, and the previous 20 days of the previous year as forest fire CI to represent the long term, medium term, and current meteorological drought conditions, by means of the comprehensive meteorological drought index and forest fire information from 1980 to 1999, forest fire warning service is provided with 〖WTBX〗H〖WTBZ〗c (forest fire CI). The analysis concludes: (1) in the whole year, the minimum forest fire factor was in June; ∑CI in May was greater than those in April and June except the previous summer autumn (∑CI was lower than that in April). (2) 89% of the samples occurred in April and June when 〖WTBX〗H〖WTBZ〗c>1, and in May there were 84% of the samples with 〖WTBX〗H〖WTBZ〗c>1 When 〖WTBX〗H〖WTBZ〗c≥2, there occurred a forest fire in ten days in 76% of years, on average 4 times per year; when 〖WTBX〗H〖WTBZ〗c<2, there occurred a fire only 45% of years, on average 23 times per year. Therefore, it can be seen that when 〖WTBX〗H〖WTBZ〗c≥2, it has high fire risk, when 1≤〖WTBX〗H〖WTBZ〗c＜2, it has moderate fire risk and when 〖WTBX〗H〖WTBZ〗c<1, it has low fire risk in spring forest fire warning service.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.