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Fire behavior in relation to environmental variables in a temperate forest
To the extent that it can be determined in what environmental conditions the fire, in a forest fire, behaves in such a way that the effect on the environment is lower, it will be possible to tend to the use of fire in a controlled manner. With which it will tend to meet specific management objectives, such as reducing the risk of fire, promote natural regeneration, encourage the production of food for wildlife, etc. In this study, the behavior of fire in controlled burns is evaluated, where pine and oak-pine conditions were worked. The methodology consisted in the inventory of trees, available fuels and shrub vegetation. Subsequently, controlled burns were applied, recording the rate of fire propagation (VP), relative humidity (RH), temperature (T) and wind speed (VV). The speed of propagation was slow due to relative humidity (RH) (greater than 48%) and wind speeds (VV) less than 5.5 km / hr. It was observed that when the relative humidity decreases, the height and the intensity of the flame increase, in the same way when increasing the temperature there was also an increase in the height of the flame. As for fuels, the shrub vegetation was burned almost 70%, while the trees did not suffer any damage. In the case of light fuels, there was a significant decrease of 90%. In fuels of 10, 100 and 1000 hours only about 10% of these were burned. It is concluded that the behavior of the fire was mainly defined by the wind speed, followed by the availability of fuels. The information generated can be used as a guide for the planning and execution of controlled burns under similar conditions.