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Method for measuring area and shape of forest gap

A technology of area and gap, applied in the field of measurement of gap features, can solve the problems of time-consuming, labor-intensive, large impact, etc., and achieve the effect of high measurement accuracy

Inactive Publication Date: 2008-12-10
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Aiming at the problems in the prior art that the measurement of the gap area is greatly affected by human factors and is time-consuming and laborious, the purpose of the present invention is to provide an objective, accurate and easy-to-operate method for measuring the gap area and shape

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  • Method for measuring area and shape of forest gap
  • Method for measuring area and shape of forest gap
  • Method for measuring area and shape of forest gap

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Embodiment Construction

[0033] (1) Experimental location

[0034] The experimental site was selected from a forest ecological experiment station (41°51.102′N, 124°54.543′E), with an altitude of 252-1116m. The climate is a warm temperate continental monsoon climate, with long and cold winters and hot and rainy summers. The annual average temperature is 3.9-5.4°C, the extreme maximum temperature is 36.5°C, and the minimum is minus 37.6°C. The annual active accumulated temperature greater than 10°C is 2497.5-2943.0°C, the frost-free period is 120-139 days, the annual average sunshine is 2433 hours, and the annual precipitation is 700-850mm, and the rainfall is concentrated in June-August. The vegetation belongs to the Changbai Mountains system, mainly natural secondary forests, and the construction species include Fraxinus rhynchophylla, Quercus mongolica, Acer mono, Juglansmandshurica, etc., and some There are long white larch (Larix olgensis) plantations and Korean pine (Pinuskoraiensis) plantations,...

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Abstract

The invention relates to a method used for measuring the area and the shape of a forest gap in the field of forestry and ecology which includes the steps of: using a digital camera with a fish-eye lens to vertically upwards shoot a semi-spherical image at a certain position in the forest gap; measuring the parameters of the forest gap; processing the semi-spherical image and recording the coordinate of the highest point of the edge wood of the forest gap in the image; calculating the area and the shape of the forest gap according to the projection principle of the fish-eye lens as well as each coordinate point and the parameters of the forest gap. The invention firstly provides a method for measuring the shape of the forest gap and fills in the blank in the researching field. The method can be adopted to fast measure the area and the shape of the forest gap, thus avoiding the effect of anthropic factors in the existing method and improving the estimation precision of the area of the forest gap; the method is easily operated and the measuring result is not affected by the measuring position.

Description

technical field [0001] The invention relates to a method for measuring the characteristics of forest gaps in the field of forestry and ecology, in particular to a method for measuring the area and shape of forest gaps. Background technique [0002] Forest gap (or translated as "gap", gap) refers to the space formed by the death of one or more canopy trees that will be occupied and renewed by new individuals. This concept arose with the study of forest cycle. Gap disturbance is an important small-scale disturbance that often occurs in forest communities. It is not only the driving factor of natural forest community succession, but also plays an important role in forest structure, dynamics and biodiversity maintenance. One of the most active fields of forest ecology research. The measurement of forest gap characteristics is the basis of forest gap research, mainly including gap area, shape, age and so on. Among them, the gap area is the most important feature of the forest g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/04G01C11/14G01B21/28
Inventor 朱教君胡理乐
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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