CN105066937A - Precise calculation measurement method for small group dynamic growth amount - Google Patents

Abstract

The invention discloses a precise calculation measurement method for small group dynamic growth amount, comprising steps of taking a group as a basic unit, calculating and measuring parameters of a mixed stand ratio, an average tree height, an average chest diameter and density by setting permanent mark points in the small group and utilizing an angle counter, and performing precise measurement and calculation on the small group dynamic growth amount. The invention can perform simple, quick, quantitative and precise measurement and calculation on the small group dynamic growth amount, improves the efficiency and precision of the small group dynamic growth amount and is easy in operation.

Description

The accurate measuring method of a kind of bottom class dynamic growth amount

One, technical field

The present invention relates to the accurate measuring method of a kind of bottom class dynamic growth amount.

Two, technical background

Forest Growth and Volume model have extensive, deep research in China, and achieve many achievements.But owing to lacking permanent sample plot observed reading, research range is restricted.Perfect along with China's successive forest inventory system, each successive forest inventory can obtain the observed reading on the repetition measurement sample ground of thousands of the comparatively complete reliable in quality of information, and real be very valuable material, is worth exploitation further, utilization.It is exactly based on continuous forest inventory data that the grinding of conventional dynamic increment is built, and carries out modeling.

In the measurement of conventional dynamic increment, permanent sample plot drops into many, and cost is high, and the every twice-a-decade of traditional continuous forest inventory, gap periods is long, cannot obtain accurate annual data.The object of this invention is to provide the accurate measuring method of a kind of bottom class dynamic growth amount, in order to provide accurate bottom class to measure annual data, and cost is little, and the cycle is short, for Dynamic Monitoring of Forest Resources provides practicable method.

Three, summary of the invention

Drop into many to improve permanent sample plot in the measurement of conventional dynamic increment, cost is high, and the every twice-a-decade of traditional continuous forest inventory, gap periods is long, accurate annual data cannot be obtained, the object of this invention is to provide the accurate measuring method of a kind of bottom class dynamic growth amount.

The object of the present invention is achieved like this:

1) forest farm level bottom class is pressed business operation condition classification, every class observes a bottom class, and each bottom class locates at representative place GPS, sets up permanent mark;

2) with the selected counting wood of azimuth observation device observation, to the red paint mark in breastheight (1.3m) place of every strain counting wood, and measure the height of tree, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the present invention be different from conventional art the counting wood only measured the diameter of a cross-section of a tree trunk 1.3 meters above the ground and be more than or equal to 5cm, all counting wood is measured.

3) calculate the parameter such as mixed double ratio, mean stand height, mean DBH increment, density of every strain counting wood, use calculated with mathematical model accumulation;

4) at Second Year in fixed point duplicate measurements, completing steps 2), 3), calculate accumulation increment;

5) observe, n is observation year number year after year, and n > 3;

6) following upgrowth situation is predicted;

7) interpolation bottom class's data year by year.

This invention has the following advantages:

1. measure once a year, the data of bottom class year by year can be provided, reduce the cycle of Dynamic Monitoring of Forest Resources;

2. method is simple, and cost is low, improves the efficiency of forest reserves increment monitoring.

Four, embodiment:

An accurate measuring method for bottom class's dynamic growth amount, difference is:

1) by forest farm level bottom class by business operation condition be divided into i class (i=1,2 ..., n), every class observes a bottom class, and each bottom class locates at representative place GPS, sets up permanent mark;

2) with 1: 50 azimuth observation and record count is wooden, to the red paint mark in breastheight (1.3m) place of every strain counting wood, and measure the height of tree, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the present invention be different from conventional art the counting wood only measured the diameter of a cross-section of a tree trunk 1.3 meters above the ground and be more than or equal to 5cm, all counting wood is measured.

3) calculate the parameter such as mixed double ratio, mean stand height, mean DBH increment, density of every strain counting wood, use calculated with mathematical model accumulation;

4) at Second Year in fixed point duplicate measurements, completing steps 2), 3), calculate accumulation increment;

5) observe, n is observation year number year after year, and n > 3;

6) following upgrowth situation is predicted;

7) interpolation bottom class's data year by year.

Claims (1)

1. the accurate measuring method of bottom class's dynamic growth amount, it is characterized in that: take bottom class as base unit, by arranging permanent marker point in bottom class, angle counter measures is utilized respectively to count wooden parameter, calculate standing forest and mix the parameters such as double ratio, mean stand height, mean DBH increment, density, precisely measure bottom class's dynamic growth amount, its concrete steps are as follows:

1) by forest farm level bottom class by business operation condition be divided into i class (i=1,2 ..., n), every class observes a bottom class, and each bottom class locates at representative place GPS, sets up permanent mark;

2) with 1: 50 azimuth observation and record count is wooden, to the red paint mark in breastheight (1.3m) place of every strain counting wood, and measure the height of tree, the diameter of a cross-section of a tree trunk 1.3 meters above the ground, the present invention be different from conventional art the counting wood only measured the diameter of a cross-section of a tree trunk 1.3 meters above the ground and be more than or equal to 5cm, all counting wood is measured.

3) calculate the parameter such as mixed double ratio, mean stand height, mean DBH increment, density of every strain counting wood, use calculated with mathematical model accumulation;

4) at Second Year in fixed point duplicate measurements, completing steps 2), 3), calculate accumulation increment;

5) observe, n is observation year number year after year, and n > 3;

6) following upgrowth situation is predicted;

7) interpolation bottom class's data year by year.