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Forest class fire spreading stimulation method based on plane octree

A technology of forest fire spread and simulation method, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as practical application limitations, and achieve the effect of less dependent parameters, improved accuracy and efficiency, and strong dynamics

Inactive Publication Date: 2012-11-28
冯泽邦
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  • Application Information

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Problems solved by technology

[0003] Therefore, in the practical application of the forest fire spread model extended by Wang Zhengfei and Mao Xianmin et al., because only the parameters of the wind speed in the above five directions are considered, the practical application is limited.

Method used

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  • Forest class fire spreading stimulation method based on plane octree
  • Forest class fire spreading stimulation method based on plane octree

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Embodiment Construction

[0012] The forest fire spread simulation method based on the planar octree is different from the existing technology, and has been greatly improved, specifically:

[0013] First, if figure 1 As shown, the fire spread direction of the forest sub-compartment is centered on the fire point, respectively uphill, downhill, left flat slope, right flat slope, left uphill, left downhill, right uphill, and right downhill 8 directions are the forest subcompartment forest fire spread direction.

[0014] Secondly, according to the mathematical model of the forest fire spread speed in eight directions, the forest fire in the small group is calculated on the uphill, downhill, left flat slope, right flat slope, left uphill, left downhill, right uphill, right downhill 8 Direction of spread speed:

[0015] Uphill: R=R 0 × K s ×exp(0.1783Vcosθ)×exp(3.533(tanφ) 1.2 )

[0016] Right uphill: R=R 0 × K s ×exp(0.1783Vcos(θ-45°))×exp{3.533[tan(φ×cos45°)] 1.2}

[0017] Right flat slope: R=R ...

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Abstract

The invention discloses a forest class fire spreading stimulation method based on a plane octree. The method comprises the following steps of: dividing the forest class fire spreading direction into eight directions of upslope, downslope, left flat slope, right flat slope, left upslope, left downslope, right upslope and right downslope by using a fire point as the center, respectively calculating the spreading speeds in the eight directions, and stimulating a forest class fire zone based on raster image data, so that forest class fire spreading is accurately stimulated.

Description

1. Technical field [0001] The invention relates to a method for simulating the spread of forest fires at the scale of a forest subcompartment for guiding forest fire fighting, in particular to a method for simulating the spread of forest fires at the scale of a forest subcompartment based on a plane octree. 2. Technical background [0002] The most widely used forest fire spread models in my country include Rothermel model and Wang Zhengfei forest fire spread model. Wang Zhengfei’s forest fire spread model is only applicable to terrains with a slope below 60°, and the uphill and the wind is going uphill. Later, Mao Xianmin and others considered the combination of wind direction and terrain and derived uphill, downhill, left flat slope, The equations of the five directions of the right flat slope and the wind direction can be calculated to obtain the forest fire spread speed in these five directions. [0003] Therefore, in the practical application of the forest fire spread ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 冯泽邦
Owner 冯泽邦