System and method for measuring forest above-ground biomass

A measurement system and biomass technology, applied in photogrammetry/video measurement, measurement devices, surveying and mapping and navigation, etc., can solve problems such as inability to complete surveys, achieve low cost, popularize and widely use, and have a wide range of applications

Inactive Publication Date: 2017-12-08
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0012] Traditional biomass survey methods require detailed plot surveys, which consume a lot of manpower and material resources, a

Method used

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  • System and method for measuring forest above-ground biomass
  • System and method for measuring forest above-ground biomass
  • System and method for measuring forest above-ground biomass

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Embodiment

[0135] The present invention is further described by way of exemplary embodiments below.

[0136] In order to verify that the present invention is effective in obtaining diameter at breast height and above-ground biomass by tree canopy area, the regression equation is first established through the first forest sample plot, including: acquiring forest canopy images by drones, splicing and outlining the images to obtain The canopy area of ​​each tree is measured on the spot, and the DBH-crown area regression equation shown in formula (1) is established; through the DBH-crown area regression equation and the known aboveground biomass-DBH regression equation is established as follows: The canopy area-aboveground biomass equation shown in formula (2). Then use the established formula (1) and formula (2) to analyze the aboveground biomass and diameter at breast height of the second forest plot, where the species of trees in the second forest plot are the same as those in the first f...

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Abstract

The invention discloses a system and a method for quickly obtaining forest above-ground biomass. A forest crown image is accurately obtained by using an unmanned aerial vehicle system with high resolution, the crown area of woods is obtained by analyzing the forest crown image, the diameter at breast height of the woods is measured in field, a diameter at breast height and crown area regression equation and an above-ground biomass and crown area regression equation are established, the diameter at breast height of woods in a forest to be predicted is obtained through the diameter at breast height and crown area regression equation, the above-ground biomass of woods in the forest to be predicted is obtained through the above-ground biomass and crown area regression equation, and then the overall above-ground biomass of the forest to be predicted is obtained. The method provided by the invention is quick, effective, accurate in result and relatively low in cost, and is beneficial for popularization and wide application of unmanned aerial vehicle technology in forestry investigation.

Description

technical field [0001] The invention relates to the field of vegetation ecology research, in particular to a measurement system and method for forest aboveground biomass. Background technique [0002] Biomass refers to the total amount of organic matter accumulated by an organism or community within a certain period of time. [0003] Forest biomass (forest biomass) includes the biomass of forest trees (the total weight of roots, stems, leaves, flowers and fruits, seeds and litter, etc.) and the biomass of the understory vegetation layer. It is usually expressed as the amount of dry matter or energy accumulated per unit area or per unit time. [0004] The biomass of forest community is the best indicator of forest ecosystem productivity, the most direct expression of forest ecosystem structure and function, and the comprehensive reflection of forest ecosystem environmental quality. Forests increase biomass by absorbing carbon from the atmosphere, and trunk biomass usually a...

Claims

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Application Information

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IPC IPC(8): G01C11/00G01C11/06
CPCG01C11/00G01C11/06
Inventor 张玉波李俊清王智王卷乐
Owner BEIJING FORESTRY UNIVERSITY
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