Moisture Content of Fine Forest Fuels and Fire Occurrence in Central Portugal
Moisture Content of Fine Forest Fuels and Fire Occurrence in Central Portugal
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DOI：
10.1071/wf9920069
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发表时间：
1992
影响因子：
3.1
通讯作者：
D. Viegas;M. Viegas;Ademir de Oliveira Ferreira
中科院分区：
文献类型：
--
作者：
D. Viegas;M. Viegas;Ademir de Oliveira Ferreira
自 1986 年以来，每天测量葡萄牙中部森林和其他地中海地区常见的 10 种精细燃料的水分含量。提供 1987-1990 年期间的平均月度结果。松树棒被用作死燃料水分含量的预测因子。与松树死针和蓝桉死叶的含水量建立了合理的相关性。还测试了BEHAVE系统MOISTURE模块的两个选项，以预测细死燃料水分含量的每日最小值。预测值总是低于直接测量值，特别是当仅使用气象数据时。当引入前一天的已知水分含量时，可以获得更好的一致性。利用试验现场周边部分地区油类火灾发生统计数据，分析同一时间段内火灾发生概率、日均火灾次数和年平均过火面积与死松针含水量的函数关系。测试地点周围和邻近的三个不同区域表现出非常相似的行为。
Moisture content of ten fine fuels frequent in the forests of CentralPortugal and in other Mediterranean areas was measured daily since 1986. Average monthly results are presented for the period of 1987-1990. Pinuspinaster sticks were used as a predictor of dead fuel moisture content. A reasonable correlation was obtained with the moisture content of Pinus pinaster dead needles and Eucalyptus globulus dead leaves. Two options of the MOISTURE module of BEHAVE system were also tested to predict the daily minimum value of fine dead fuel moisture content. Predicted values were always lower than direct measurements, specially when only meteorological data was used. A better agreement was obtained when known moisture content of the previous day was introduced. Using statistical data of oily fire occurrence in some districts around the site where the tests were made, for the same period of time, the probability of fire occurrence, the average number of daily fires and the average area burned each year was analysed as a function of dead pine needles moisture content. Three distinct zones, around and adjacent to the test site showed a very similar behaviour.