Calculation method for discontinuous forest combustible load

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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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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