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Evaluation and calculation method for five structural indexes of forest spatial distribution

An index, forest technology, applied in the field of forest managers, can solve problems such as inability to obtain accurate values

Inactive Publication Date: 2016-10-12
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

However, the huge forest area prevents us from accurately obtaining the exact values ​​of these indices

Method used

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  • Evaluation and calculation method for five structural indexes of forest spatial distribution
  • Evaluation and calculation method for five structural indexes of forest spatial distribution
  • Evaluation and calculation method for five structural indexes of forest spatial distribution

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Experimental program
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Embodiment Construction

[0005] 1. Select No. 1 wood as the reference wood, and record the horizontal distance D according to the horizontal distance Di (i=1, 2, ..., n) from the reference wood from small to large i , d of each tree i (diameter at breast height), tree height H i ,species.

[0006] 2. After obtaining the above data, use the general algorithm to calculate the density N, the average height average chest diameter average sectional area Seedling volume M and other parameters:

[0007]

[0008]

[0009] d ‾ = Σd i + 0.5 d i - 0.5

[0010] G ‾ = 1 4 π d ‾ 2

[0011] (where fε is the expe...

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Abstract

The invention discloses an evaluation and calculation method for the five structural indexes of forest spatial distribution. The method is characterized by comprising the steps of selecting No.1 wood as the reference wood; sequentially marking the horizontal distance Di of each tree, the di (diameter at breast height) of the tree, the height of the tree and the variety of the tree from small in a sequence with the horizontal distances Di (i=1, 2, ..., n) of all the trees from the reference wood to be from small to large; and calculating the density N, the average height, the average diameter at breast height, the average cross-sectional area, the seedling production amount and other parameters according to the generalized algorithm.

Description

1. Technical field [0001] The invention relates to the technical field of forest managers, in particular to a calculation and evaluation method for the current spatial distribution of forest trees. 2. Technical Background [0002] In forestry work, there are roughly the following indexes to evaluate the condition of a forest: density, average height, average diameter at breast height, average basal area, and seedling volume. However, the huge forest area prevents us from accurately obtaining the exact values ​​of these indices. In forest work, these indices are generally estimated by some reasonable method. The present invention is an evaluation method for one of the more commonly used estimation methods. 3. Contents of the invention [0003] Choose No. 1 wood as the reference wood, and write down the horizontal distance D according to the horizontal distance Di (i=1, 2, ..., n) from the reference wood from small to large i , d of each tree i (diameter at breast height...

Claims

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Application Information

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IPC IPC(8): G06Q50/00G06Q50/02
CPCG06Q50/00G06Q50/02
Inventor 冯仲科孙仁杰张力邱梓轩
Owner BEIJING FORESTRY UNIVERSITY
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