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Forest fire combustible combustion efficiency estimation method

A combustion efficiency, forest fire technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as providing strong support for accurate calculation of carbon emissions from forest fires, etc., to achieve accurate estimation, improve accuracy, and reduce work. amount of effect

Inactive Publication Date: 2014-06-25
INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY
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Problems solved by technology

[0005] At present, there are few studies on the combustion efficiency of forest fire combustibles in my country, and it is difficult to provide strong support for the accurate calculation of forest fire carbon release

Method used

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  • Forest fire combustible combustion efficiency estimation method
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  • Forest fire combustible combustion efficiency estimation method

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Embodiment Construction

[0040] Combine the following figure 1 , taking CBERS-02B data as an example to illustrate, in practice it is not limited to CBERS-02B data, other remote sensing data are also applicable.

[0041] The method for estimating the combustion efficiency of combustibles in forest fires includes the following steps:

[0042] Step 1: Classify combustibles in the study area according to forest inventory data, remote sensing images, vegetation distribution maps, etc. Based on the classification of combustibles, select different types of burnt areas, and set more than 3 blocks in each type of burnt area. The size of each plot is 20m × 20m, and GPS positioning is used to record the latitude and longitude of the plot. The plot is used for the investigation of combustible material load.

[0043] Step 2: Set up a control plot. The type and specifications of the control plot are the same as those of the burned plot, and the trees, shrubs, herbs, surface litter and semi-decomposed layer are in...

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Abstract

The invention discloses a forest fire combustible combustion efficiency estimation method. The method is characterized by including the steps: setting up a relation model of combustion efficiency and an FWI (fire weather index) of a main vegetation type on the basis of ground investigation, remote sensing and the FWI, and using weather daily value data and vegetation type data of a region to estimate combustion efficiency of the study region. The forest fire combustible combustion efficiency estimation method has the advantages that ground investigation workload is relieved, combustion efficiency estimation precision is improved, and changing of combustion efficiency estimation from point estimation to facial estimation is realized; due to the fact that remote sensing is susceptible to a weather system and favorable satellite images cannot be always acquired during firing, combustion efficiency of forest fire combustible can be accurately estimated only through calculation of earth surface FWI by steps of using the remote sensing method to estimate combustion efficiency, setting a regression model with the FWI and estimating the combustion efficiency of the forest fire combustible through the FWI, and accordingly limits of remote sensing images are eradicated.

Description

technical field [0001] The invention relates to a method for estimating the combustion efficiency of combustibles, in particular to a method for estimating the combustion efficiency of combustibles in forest fires based on a fire risk weather index, forest type, etc., and belongs to the technical field of forest disaster prevention. Background technique [0002] The combustion efficiency of combustibles in forest fires refers to the ratio of the biomass mass burned to the total biomass mass, and is a key factor for calculating the amount of greenhouse gas released from forest fires. [0003] The determination of the combustion efficiency of combustibles is affected by many factors, such as terrain, season, weather, vegetation type, etc., which are spatially heterogeneous; in addition, there are great differences due to different combustion intensities. [0004] Due to the different estimates of combustion efficiency by different scholars, there are great differences in the e...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王明玉舒立福赵凤君田晓瑞
Owner INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY