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A method for measuring the sparse degree of wind-resistant and sand-fixing forests in the oasis-desert transition zone

A measurement method and technology of porosity, applied in the field of shelterbelt ecological engineering, can solve problems such as rare reports in applied research, and achieve the effects of broad application prospects, good measurement accuracy, and easy operation

Inactive Publication Date: 2019-01-25
TAIYUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there are few reports on the application of this technology in windbreak and sand-fixation forests in the oasis-desert transition zone

Method used

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  • A method for measuring the sparse degree of wind-resistant and sand-fixing forests in the oasis-desert transition zone
  • A method for measuring the sparse degree of wind-resistant and sand-fixing forests in the oasis-desert transition zone
  • A method for measuring the sparse degree of wind-resistant and sand-fixing forests in the oasis-desert transition zone

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Embodiment Construction

[0031] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0032] refer to Figure 1-9 , the present embodiment adopts the following technical solutions: a method for measuring the porosity of windbreak and sand-fixing forest suitable for oasis-desert transition zone, the steps are:

[0033](1) Select windbreak and sand-fixation forest plots in the southern margin of the Junggar Basin in the early stage of desert vegetation growth, including pure-species forests composed of a single tree species (generally poplar or elm) and mixed forests composed of two species (generally poplar This season is the strong wind and sand activity period in the Junggar Basin, and the forest belt is in the winter phase, the branches and leaves are not fully unfolded, and the protection effect of the forest belt is weak. Use ...

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Abstract

The invention discloses a method for measuring the sparse degree of wind-resistant and sand-fixing forests in oasis-desert transition zone. Different types of wind-resistant and sand-fixing forests are selected in the oasis-desert transition zone, and the forest belt images are captured with a high-resolution FUJIFILM FinePix S5000 digital camera and transmitted to a computer. With the support ofa Windows XP or Windows 7 platform, Using digital image processing software Adobe Photoshop 7.0, According to the gray difference between the forest belt branch and its gap on the photograph, the threshold color scale value is 128, then they are separated by black-and-white binary image processing, the porosity of the forest belt image is counted by the number of pixels occupied by each pixel, andthe actual porosity of the forest belt is estimated by the porosity calculation formula. The invention can effectively reduce the error range of the calculation of the porosity of the wind-proof andsand-fixing forest, and achieve better measuring accuracy, rapidity, accuracy and simple and convenient operation.

Description

technical field [0001] The invention relates to the technical field of shelterbelt ecological engineering, in particular to a method for measuring the porosity of a windbreak and sand-fixing forest suitable for an oasis-desert transition zone. Background technique [0002] The windbreak and sand-fixing forest in the oasis-desert transition zone can significantly weaken the near-surface wind speed, and significantly reduce the sand transport rate in the near-surface elevation, thus playing an important role in preventing wind-sand disasters and desertification hazards. The protective effect of windbreak and sand-fixation forest depends on the influence of specific structure of forest belt on aerodynamic characteristics such as wind speed, turbulence stress and pressure. Among many forest belt structure factors, porosity is the comprehensive characterization of other structural factors. Therefore, in production and theoretical research, porosity is often used as one of the mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/36G06K9/62G01D21/00
CPCG01D21/00G06V20/00G06V10/20G06V10/50G06F18/40Y02A40/22
Inventor 徐满厚秦瑞敏
Owner TAIYUAN NORMAL UNIV