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Three-dimensional forest fire spreading simulation method and system

A technology of forest fire spread and simulation method, applied in the field of 3D-based forest fire spread simulation method and system, can solve problems such as low prediction accuracy and limited application of fire spread model, and achieve high-precision effects

Inactive Publication Date: 2017-03-29
BEIJING AEROSPACE TITAN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of limited application of fire spread model in specific areas and low prediction accuracy in the prior art

Method used

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  • Three-dimensional forest fire spreading simulation method and system
  • Three-dimensional forest fire spreading simulation method and system

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Experimental program
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Embodiment 1

[0043] Such as figure 1 As shown, a kind of method for simulating forest fire spread based on three-dimensional that the present embodiment provides, comprises the following steps:

[0044] S1: 3D terrain factor generation:

[0045] Three-dimensional spatial analysis of the digital elevation model is carried out on the GIS platform to obtain slope and aspect maps.

[0046] Among them, the GIS platform preferably uses Arcgis, which has a spatial analysis module that can automatically analyze a digital elevation model (DEM, Digital Elevation Model). A 3D map with slope and aspect data is obtained. In addition, Arcgis contains a large number of programmable components, which improves the scalability of GIS platform applications.

[0047] S2: 3D wind field simulation:

[0048] Based on the data of the digital elevation model, the wind speed and direction are simulated to obtain the wind field data on the three-dimensional terrain;

[0049] The simulation of wind speed and win...

Embodiment 2

[0077] Such as figure 2 As shown, the present embodiment provides a three-dimensional forest fire spread simulation system for implementing the method described in Embodiment 1. The system includes the following functional modules:

[0078] The three-dimensional terrain factor generation module 101 is used to perform three-dimensional space analysis on the digital elevation model on the GIS platform, and obtain slope and slope aspect maps;

[0079] The three-dimensional wind field simulation module 102 is used to simulate wind speed and wind direction on the basis of digital elevation model data, and obtain wind field data on the three-dimensional terrain;

[0080] The temperature field and humidity field simulation module 103 is used for interpolation processing based on discrete temperature, humidity and digital elevation model data; this module is specifically used for:

[0081] Based on the discrete temperature, humidity and digital elevation model data, eliminate the al...

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Abstract

The invention discloses a three-dimensional forest fire spreading simulation method and system. The method comprises steps of S1, three-dimensional landform factor generation; S2, three-dimensional wind field stimulation, on the basis of the data of a digital elevation model, wind speed and wind direction simulation is carried out, and the wind field data of a three-dimensional landform is acquired; S3, temperature field and humidity field stimulation, on the basis of the discrete temperature, humidity and digital elevation model data, interpolation processing is carried out; S4, combustible coefficient division, three-dimensional combustible coefficient data distribution is generated on the basis of the forest type distribution data; S5, three-dimensional fire field spreading simulation, a three-dimensional fire field spreading model is generated on the basis of a three-dimensional gradient, a slope direction, a wind speed, a wind direction, temperature, humidity and a combustible coefficient factor; and S6, three-dimensional fire field spreading information acquisition. The method is advantaged in that the method is applicable to forest fire spreading simulation, and a more precise simulation result can be acquired.

Description

technical field [0001] The invention relates to a fire spread simulation method, in particular to a three-dimensional forest fire spread simulation method and system. Background technique [0002] At present, the most widely used forest fire spread models in my country include Mao Xianmin 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] In the practical application of the forest fire spread model extended by Wang Zhengfei and Mao Xianmin et al., because only the above wind speed parameters are considered, the application in the a...

Claims

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Application Information

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IPC IPC(8): G06T17/05
CPCG06T17/05G06T2210/61Y02A90/10
Inventor 谭靖李莹彭松段卫虎
Owner BEIJING AEROSPACE TITAN TECH CO LTD
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