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forest fire prevention techniques

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Fire-retardant building materials have also been developed, such as the paints and chemicals used to coat and impregnate combustible materials, such as wood and fabric. These include heat-sensitive devices, which are activated if a specific temperature is reached; a rate-of-rise detector, which is triggered either by a quick or a gradual escalation of temperature; and smoke detectors, which sense changes caused by the presence of smoke, in the intensity of light, in the refraction of light, or in the ionization of air. These include electronic heat and smoke detectors that can activate audible alarm devices to warn the building population and automatically notify local fire departments. Bush, grass, and forest fires are frequently fought using the same equipment that is used on structural fires. It has also become necessary to combat fires in pressurized chambers, including spacecraft. Canadian attitudes to fire have changed markedly over the years. Forest managers seek to balance fire’s ecological benefits with the need to protect people’s safety, property and timber resources. The effectiveness of these systems has been proved in data accumulated from throughout the world: in buildings protected by sprinkler systems that had fires, the system extinguished fires in 65 percent of the cases and contained fires until other fire-fighting measures could be taken in 32 percent of the cases. The Forest Service has been managing wildland fire on National Forests and Grasslands for more than 100 years. National Predictive Services products include weekly and monthly significant wildland fire potential outlooks, intelligence reports that are produced daily or weekly depending on wildfire activity, and annual reports. Suppression, as forest managers were coming to realize, was not always necessary or desirable. Sustainable forest management requires analyzing a host of factors to evaluate options and assess the potential impacts of wildland fire across a range of forest values. Artificial vision and image processing techniques have been developed mainly for forest fire detection , , . Since then most urban areas have established some form of a fire-prevention unit, the staff of which concentrates on such measures as heightening public awareness; incorporating fire-prevention measures in building design and in the design of machinery and the execution of industrial activity; reducing the potential sources of fire; and outfitting structures with such equipment as extinguishers and sprinkler systems to minimize the effects of fire. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Increasingly, Canadians realize that it is not economically possible or ecologically desirable to eliminate all wildland fires. International Handbook on Forest Fire Protection Technical guide for the countries ... increasingly effi cient forest fi re prevention and suppression systems. Fire management is the process of planning, preventing and fighting fires to protect people, property and the forest resource. The Wildfire Threat Rating System (WTRS) assesses and maps four main components of fire risk: ignition, values at risk, suppression capability and expected fire behaviour. However, the time scale and spatial resolution of these systems is still very low for the requirements of forest fire fighting in many cases . Besides the fire alarms that are triggered by people, there are many automatic devices that can detect the presence of fire. 3. Fire management is a big responsibility, and firefighting can be an expensive proposition. Let us know if you have suggestions to improve this article (requires login).

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