SU1436938A1 - Method of determining the reserve of standing timber - Google Patents

Abstract

The invention relates to the field of forest taxation. The purpose of the invention is to improve the accuracy of determination and productivity. In the taxation unit, an accounting tree is selected from the first rus of the main forest element, close to the average value, around 4 to 8 boundary trees from the first rus are selected around the accounting tree. The distance between the accounting and boundary trees and between adjacent boundary trees is measured. The diameters of the trees included in the polygonal test patch, hell, are measured. Measure tree heights and other indicators. According to the measurement data, the area of the polygon, the cross-sectional area of the tree trunks and the area of the parts of the dumps of the boundary trees in the polygon are calculated. The stock of stands in a square is defined as the ratio of the sum of the cross-sectional areas of the tree trunks that are covered in the test plot to the area Q of this site. 1 h. item f-ly, 2 ill. S

Description

with

05 WITH

CO 00

The invention relates to forest taxation, in particular, to the determination of measuring and enumerating taxation indicators of forest and forestry, timber industry enterprises, and can be used by environmental authorities and other resource users.

The purpose of the invention is to improve the accuracy of determining the stock of tree stands and labor productivity in solving problems of determining forest resources.

FIG. 1 shows a polygonal test plot and the cross sections of tree trunks included in it; in fig. 2 - part of a polygonal test plot.

The invention is carried out as follows.

On a taxation unit, at a systematically planned point, an accounting tree is selected from the first rus of the main forest element, close to the mean value. 4-8 closest border (surrounding) trees from the first Rusa (regardless of the forest element) are selected around the account tree. The boundary trees in order are assigned indices, 2, ..., n, starting with the tree closest in azimuth to the north direction. The trees of the second and subsequent Rus are assigned indices, 2, ..., n. They measure the distance loi + i between the accounting and boundary trees m and lj, - + i between the adjacent boundary trees. The diameters of the di, d of the trees included in the polygonal test site are measured. The results of measurements of the diameters of the trees of the first Rus are recorded in the statement, respectively, of the results of measurements of distances, and the diameters of the trees of the second and subsequent Rus are recorded in separate lines. Measure tree heights and other indicators. Go to the next selection point and carry out similar work. Measurement records are sent to the computing center, since, in addition to reducing the time and cost of processing the field material, this data is necessary for operation without data from sample plots and accounting trees.

Calculate the area of the j-th polygonal test pad:

) / - 515 ;.

(four)

one

The total cross-sectional area of the parts of the tree trunks G, per area of the jth polygonal platform is determined:

 L 360

e (5)

the cross-sectional area of the i-ro tree (for the first Rus);

.-

 the cross-sectional area of the i-ro tree (for the second and subsequent Russ). For boundary trees, the inner angles a, the vertices of the polygon, determine:

() / + ags1p ---- 2 | L +

23.1

about)

+ arcsin

Lo, i L, i-f-1

For account and i-ro trees. Calculate the average value of the absolute taxation completeness per 1 ha from the results of the t-polygonal test pads:

t

G (MVra).

from

(7)

one

five

Calculate the number of trees Nitsu area of the area:

"

N

on one

fn

5: (n

one

)

t

i

(eight)

The weighted average growing area of i-ro (i-ro) trees in the j-th polygonal trial platform is calculated:

The measurement results are processed according to the following formulas.

Calculate (Fig. 2) the sides LO ,, + I, L, -, of the triangles and their semi-perimeters P, -:

1 I o-t.1, -, (H-I-Io

..

2

(one)

a - Lo. + Lo.i + r + Lj.i + i (2)

2

Calculate the areas on three sides:

triangles

S, (,, -) X (Р -LO,; + |) X (Pv + l). (3)

 §.

Gjei (l)

L

360

(9)

According to the results of measurements and calculations on trial plots, the volume of trees and the stand of trees are determined according to generally accepted rules.

Claims (2)

1. The method of determining the stock of the stand, including the laying of test plots, counting trees for them, the choice of accounting trees and their measurement, determining the ratio of the sum of the areas of cross sections of tree trunks to the size of the trial area and calculating the stock of tree stands according to measurement data, characterized in that, in order to improve the accuracy of determining tree stock and labor productivity, before laying out test areas, choose a stand tree and around it the nearest boundary trees from the first Rus, measure the distance between the accounting and boundary trees and between the neighboring boundary trees, lay the trial area ku in the form of a polygon whose vertices are located in the centers of the trunks of the boundary trees, calculate the area of a polygon, the cross-sectional area of tree trunks and the area of parts of the trunks of the boundary trees included in the polygon according to the measurement data, and calculate the ratio of the sum of the area of the cross-sectional sections of the tree trunks included in the test site according to calculations . 2. A method according to claim 1, characterized in that the account tree is selected from the main forest element, close to its average value at the systematically designated selection points, and the boundary trees are selected around it in the amount of 4-8 from the first Russ trees. FIG. 2 g j X /