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Calculation method for discontinuous forest combustible load

A calculation method and discontinuous technology, applied in the field of remote sensing inversion, can solve the problems of strong data dependence, lack of vegetation radiation transfer mechanism for combustible loads, and poor universality, so as to alleviate underestimation of high values, improve estimation accuracy and universality. Adaptability, the effect of improving the simulation ability

Active Publication Date: 2021-04-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] In view of the problems that the existing empirical method for estimating forest fuel load lacks vegetation radiative transfer mechanism, strong dependence on data, and poor universality, and the existing semi-empirical model (WCM) for estimating aboveground biomass in discontinuous forest coverage areas does not Fully consider the serious high value underestimation caused by the vegetation coverage, and provide a method for calculating the fuel load in the forest more accurately for discontinuous forests

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  • Calculation method for discontinuous forest combustible load
  • Calculation method for discontinuous forest combustible load
  • Calculation method for discontinuous forest combustible load

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Embodiment Construction

[0026] The semi-empirical model for discontinuous forest fuel load inversion provided by the present invention will be further described below in conjunction with specific embodiments and accompanying drawings:

[0027] A semi-empirical model for the inversion of fuel loads in discontinuous forests, such as figure 1 shown, including the following steps:

[0028] (1) Data preparation

[0029] The measured forest fuel load data set is BioSAR 2008 data provided by the European Space Agency. The data involved the combustible loads of leaves, branches and trunks of 31 forest plots in eastern Sweden. The effective spatial resolution ranged from 2.4 to 26.3 hectares. The ground survey time was mid-October 2008. Such as figure 2 As shown, its spatial coverage is 19.702-19.874E, 64.209-64.276N, and its spatial reference is WGS84. The optical remote sensing data is Landsat ETM+, and the secondary products of surface reflectance are obtained through the Google Earth Engine platform,...

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Abstract

The invention discloses a calculation method for a discontinuous forest combustible load, and relates to the technical field of remote sensing inversion. Aiming at the problems of lack of a vegetation radiation transmission mechanism, strong dependence on data, poor universality and the like of an existing empirical method-based forest combustible load estimation method, and the problems of serious high-value underestimation and the like caused by insufficient consideration of vegetation coverage in a discontinuous forest coverage area of an existing semi-empirical model-based overground biomass estimation method, the invention provides a forest combustible load estimation method based on a semi-empirical model. According to the method, the established semi-empirical model is adopted, optical data are introduced into the semi-empirical model and applied to estimation of forest combustible loads, vegetation coverage information of a discontinuous forest coverage area is fully represented, the simulation capacity of the model for ground surface back scattering signals is improved, and therefore the problem of high-value underestimation is relieved; the forest combustible load estimation precision and universality based on the semi-empirical model are improved, and a new method is provided for large-range forest combustible load spatial distribution estimation.

Description

technical field [0001] The invention relates to the technical field of remote sensing inversion, in particular to a calculation method for non-continuous forest fuel loads. Background technique [0002] Wildfire is a disturbance that widely exists in various ecosystems and has an important impact on the formation and succession of ecosystems. It can enrich the vertical structure and biodiversity of vegetation, promote nutrient cycle, and enhance the resistance of vegetation to diseases and insect pests. However, once the wildfire gets out of control, it will cause soil degradation, destroy the water and soil conservation function of vegetation, release a large amount of greenhouse gases, and even threaten the safety of human life and property. [0003] Forest fuel load, including leaf fuel load, branch fuel load and trunk fuel load, that is, the dry matter weight of leaves, branches and trunks per unit area, is a key factor that causes forest fires, because it contains avai...

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Application Information

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IPC IPC(8): G06F30/20G01N21/17G01N21/55G01S7/48G01S17/90
CPCG06F30/20G01N21/17G01N21/55G01S17/90G01S7/4802G01N2021/1793
Inventor 何彬彬李彦樨全兴文
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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