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A forest stand growth simulation method and system considering space structure and growth interaction

A technology of spatial structure and stand growth, which is applied in the field of stand growth simulation considering the interaction between spatial structure and growth, can solve the problems such as failure to reflect the interaction process of stand spatial structure and growth, and the complex modeling process, so as to accelerate the grassroots level. Promote application, make up for the complex process, and realize the effect of mining and utilization

Active Publication Date: 2019-03-08
RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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Problems solved by technology

The traditional forest stand growth simulation technology is based on the actual situation of the forest stand at different sites and different development stages, and uses certain mathematical methods to obtain charts, formulas and computer programs that can predict the growth, death and other contents of the forest stand. The modeling process is complex and fails to reflect the interactive process between the stand spatial structure and growth

Method used

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  • A forest stand growth simulation method and system considering space structure and growth interaction
  • A forest stand growth simulation method and system considering space structure and growth interaction
  • A forest stand growth simulation method and system considering space structure and growth interaction

Examples

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specific Embodiment 1

[0103] An example of stand growth simulation of Chinese fir plantation in Huangfengqiao State-owned Forest Farm, Hunan:

[0104] Sample library data acquisition and calculation:

[0105] Using a total station to measure the relative coordinates (X, Y, Z) of the root of a single Chinese fir tree, investigate the diameter at breast height, tree height, crown width, height of living branches, growth status, etc. by conventional field surveys, and collect data at intervals of one year The 2012-2017 continuous survey data of 6 Chinese fir plantation plots. The status indexes of the six plots are consistent, and the attribute distribution of the core area (5m away from the boundary) is shown in Table 2.

[0106] Table 2 Basic statistics of plot factors

[0107]

[0108]

[0109] Note: In attribute distribution, a-b-c means minimum-mean-maximum.

[0110] The age span of the 6 sample plots is continuous (10-28 years), and the forest growth of 10-28 years can be predicted, and...

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Abstract

The invention discloses a forest stand growth simulation method and system considering space structure and growth interaction. The method comprises the following steps of constructing a forest stand growth sample library; obtaining the annual growth rate of the forest; selecting forest stand growth parameters according to the annual growth rate of the forest to obtain characteristic variables in asample library; acquiring a characteristic variable of the to-be-simulated forest tree; calculating the Mahalanobis distance between the characteristic variable of the to-be-simulated forest tree andthe characteristic variable of the forest tree in the sample library; determining the most similar sample forest according to the Mahalanobis distance; obtaining the annual growth rate of the sampleforest tree; predicting the growth attribute of the to-be-simulated forest tree in the nth year according to the annual growth rate of the sample forest tree, judging whether the to-be-simulated forest tree reaches the termination age or not, and stopping the simulated growth attribute if the to-be-simulated forest tree reaches the termination age; and if the end age is not reached, continuing tosimulate. By adopting the method, the defect that a traditional forest stand growth mathematical modeling technology is complex in process can be overcome, and the full mining and the utilization of massive forestry data are realized.

Description

technical field [0001] The invention relates to the technical field of forest growth visualization, in particular to a stand growth simulation method and system considering the interaction between spatial structure and growth. Background technique [0002] As an important part of forest management, stand growth simulation technology has important guiding significance for forestry production practice, and has always been a hot and difficult point in forestry scientific research. The traditional forest stand growth simulation technology is based on the actual situation of the forest stand at different sites and different development stages, and uses certain mathematical methods to obtain charts, formulas and computer programs that can predict the growth, death and other contents of the forest stand. The modeling process is complex and fails to reflect the interactive process between the stand spatial structure and growth. As the spatial characteristics related to the spatial ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02
CPCG06Q50/02G06F30/20
Inventor 张怀清李思佳李永亮杨廷栋
Owner RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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