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Method for measuring and calculating tree distribution degree and tree measurement factor of forest stand

A technology of distribution and stand, applied in measurement devices, instruments, etc., can solve problems such as low efficiency, poor accuracy, long cycle, etc., and achieve the effect of improving management efficiency

Inactive Publication Date: 2019-11-05
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

In order to overcome the shortcomings of poor precision, low efficiency and long cycle when collecting data in the field, and realize the accurate measurement of stand data, this method adopts a method for measuring the distribution degree of stand trees and tree measurement factors

Method used

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  • Method for measuring and calculating tree distribution degree and tree measurement factor of forest stand
  • Method for measuring and calculating tree distribution degree and tree measurement factor of forest stand
  • Method for measuring and calculating tree distribution degree and tree measurement factor of forest stand

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Embodiment Construction

[0019] A method for measuring tree distribution and tree measurement factors is different from existing methods, specifically:

[0020] ((1) Select nine trees for measurement, the method is as follows: take 1 as the reference tree, measure its d 1 , H 1 , And at the same time, using the reference tree 1 as the observation point, after measuring the i-th tree (i=2, 3,..., 9) nearest to the tree number 1, measure αi and s respectively i , D i , Where αi is the inclination angle, s i Is the azimuth angle, d i Diameter at breast height of single wood;

[0021] (2) Take 1-9 as the direction line, 1 / 2(S 10 +S 9 ) Is the half diagonal length, establish a square, and construct a 3×3 grid;

[0022] (3) Calculate the distribution degree of forest trees: uniformity, size ratio, mixed degree:

[0023] Evenness: pi is the percentage of the i-th tree species, and S is the number of tree species in the forest stand;

[0024] Size ratio: M i Represents the degree of mixing of forest trees at point i,...

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Abstract

The invention discloses a method for measuring and calculating a tree distribution degree and a tree measurement factor of a forest stand, which is characterized in that nine trees in the forest standare calculated, and a measurement method of the tree distribution degree of the forest stand can be obtained after the calculation: uniformity, a size ratio, a mixing ratio, the density of the foreststand, an average diameter at breast height of the forest stand, and a stand volume of the forest stand.

Description

[0001] 1. Technical Field [0002] A method for measuring the distribution degree of forest trees and tree measurement factors, which is characterized in that by measuring the nine trees in the forest stand, the uniformity, size ratio, mixing ratio, stand density, and forest stand can be obtained. Average diameter at breast height and forest stand volume. [0003] 2. Technical background [0004] In order to reveal the law of forest growth and succession and scientific management, management, and utilization of forests, a large area of ​​forest is divided into a number of forest areas with the same internal characteristics and obvious differences from the surrounding forests according to their own characteristics and management needs. It is a complex of trees, shrubs, and ground cover. This complex is called a forest stand. The forest stand is the smallest unit of a zoning forest. It is necessary to manage the forest. Forest survey. [0005] The traditional forestry survey method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 冯仲科常晨林奕成
Owner BEIJING FORESTRY UNIVERSITY
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