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Forest stand growth model establishing method and system

A technology for model building and stand growth, applied in 3D modeling, image data processing, special data processing applications, etc., can solve problems that cannot be well adapted to the research of forest vegetation, and achieve accurate results

Pending Publication Date: 2021-03-02
GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
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  • Description
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  • Application Information

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Problems solved by technology

Chinese patent CN111191386A discloses a multi-scale compatible tree annual growth model group modeling method. Although a rough model can be established, this model cannot be well adapted to the research of forest vegetation on power lines, so there are certain limitations. limitation

Method used

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  • Forest stand growth model establishing method and system
  • Forest stand growth model establishing method and system
  • Forest stand growth model establishing method and system

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Embodiment 1

[0046] A method for establishing a stand growth model, comprising the following steps:

[0047] S1, set the time of the growth simulation to be carried out, calculate the dead frequency of each tree according to the dead tree model, calculate the relative tree height of all trees in the stand, and record it, and calculate the dead frequency of the tree;

[0048] S2, establish a stand density prediction model according to the stand density, and utilize the stand density prediction model to calculate the stand number density at the prediction time;

[0049] S3, all trees in the stand are sorted according to the order of dead frequency from large to small, and the trees with higher dead frequency are removed;

[0050] S4. Finally, the growth parameters of the remaining trees are calculated, and the geometric model of the tree is updated according to the growth parameters of the trees calculated above.

[0051] In this embodiment, the following steps are also included:

[0052] ...

Embodiment 2

[0068] like Figure 1-3 Shown, a kind of forest stand growth model establishment system, comprises measurement component 100, data display component 200 and mobile detection component 300; Measurement component 100 comprises the detection carpet 101 that is arranged on forest site, the detector 102 that is arranged on detection carpet 101 And the calculation component 103 that is arranged on the detector 102 place, the detection carpet 101 is placed with the mobile detection component 300; The drawing part 203 arranged on the drawing platform 202, the movement detection part 300 includes a moving body 301, a conveyor pulley 302 arranged on both sides of the moving body 301, and a pole 304 arranged on the moving body 301, and the upper end of the pole 304 is rotatably connected with Camera 305, wherein, the lower end of the mobile body 301 is provided with a placement groove 306, the placement groove 306 is rotatably connected with a support rod 307, the lower end of the suppor...

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Abstract

The invention relates to the technical field of forest stand growth models, in particular to a forest stand growth model establishing method which comprises the following steps: S1, setting growth simulation time to be performed, calculating withering frequency of each forest according to a forest withering model, calculating relative tree heights of all trees in a forest stand, recording and calculating the withering frequency of the trees; S2, establishing a forest stand density prediction model according to the forest stand density, and calculating the plant number density of the forest stand at the prediction time by utilizing the forest stand density prediction model; S3, sorting all the forests in the forest stand according to the descending order of the withering frequency, and clearing the forests with higher withering frequency; and S4, finally calculating the growth parameters of the remaining forest trees, and updating the geometric model of the tree according to the calculated growth parameters of the forest trees. The forest stand growth model establishing method can be better suitable for establishing a model of forest vegetation along a power line, and the accuracy is better.

Description

technical field [0001] The invention relates to the technical field of stand growth models, in particular to a method and system for establishing a stand growth model. Background technique [0002] Avery and Burkhart defined the growth model as: charts, formulas and computer programs that can indirectly predict forest growth, death and other content based on the actual conditions of forest communities at different sites and at different developmental stages, after processing with certain mathematical methods Wait. In 1987, the World Conference on Forest Growth Simulation and Modeling pointed out that a forest growth model refers to one or a group of mathematical functions, which describe the relationship between tree growth and forest state and site conditions. [0003] At present, most of the forest vegetation along the power line will more or less have a certain impact on the power line, especially the masson pine plant. If the growth condition is good, it can protect the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/00
CPCG06F30/20G06T17/00
Inventor 陈亮夏国飞董承熙谭麒李俊宏曾彦超李广俊
Owner GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
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