Danger Degrees Adjustment For The
Monte Alegre Formula (FMA)
Author(s)
W. T. Wendling, R. V. Soares, A. C. Batista & A. F. Tetto
Abstract
The Monte Alegre Formula (FMA) is the most used fire danger index in Brazil
to determine forest fire danger degree and planning prevention and suppression
activities. This research aimed to adjust the danger degree levels of the FMA
index in order to increase its efficiency to predict forest fires. A database
consisted of thirty years of fire records and meteorological data from a forest
district located in the County of Telemaco Borba, Parana State, southern Brazil
was used to carry out the research. Simulations comprised 5 and 10 year periods,
discriminating the occurrences in two annual seasons, a dry (May to September)
and a humid (October to April), by monthly average relative humidity criterion.
Trends in frequencies of fire occurrences, and season periods, were compared to
the total annual period and corrected by the considered optimal values for
planning the suppression structure. After that, the FMA original danger degree
values were mathematically recalculated in order to obtain the lower and upper
limits of the new five levels danger scale, to be used in the future. The limits of
the adjusted danger degrees presented differences between the two annual
seasons (dry and humid), as well as between these and the total annual period,
what indicates the efficiency of the proposed methodology. The application of
the new methodology could be viable also in other geographic regions.
Keywords: fire danger index, fire control, forest protection.
1 Introduction
The knowledge of the daily danger degree is an essential tool for decision
making regarding forest fire control. For this purpose, there are the fire danger
indices, which indicate the possibility of fire occurrence and/or propagation
based on the weather conditions of the day or from a sequence of days [1].
Keywords
fire danger index, fire control, forest protection.
Related Book
Other papers in this volume
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