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Farmland protection forest windproof effect metering method based on spatial information technology

A technology of spatial information technology and farmland shelterbelts, which is applied in the field of measurement of windbreak effect of farmland shelterbelts based on spatial information technology, can solve problems such as inappropriate evaluation results and poor accuracy, and achieve the effect of improving evaluation accuracy and ensuring accuracy

Active Publication Date: 2020-08-14
NORTHEAST FORESTRY UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the accuracy of the current evaluation of the windbreak efficiency of farmland shelterbelts is not good, and the evaluation results are not suitable for guiding the design of shelterbelts, and a method for measuring the windbreak effect of farmland shelterbelts based on spatial information technology is proposed

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  • Farmland protection forest windproof effect metering method based on spatial information technology
  • Farmland protection forest windproof effect metering method based on spatial information technology
  • Farmland protection forest windproof effect metering method based on spatial information technology

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 This embodiment will be described. A method for measuring the windproof effect of farmland shelterbelts based on spatial information technology described in this embodiment, the method is specifically implemented through the following steps:

[0020] Step 1, collecting farmland shelterbelt remote sensing images, performing remote sensing data preprocessing on the collected remote sensing images, and obtaining farmland shelterbelt surface albedo image data;

[0021] Step 2. Use pattern recognition to extract farmland shelterbelt data from the obtained surface reflectance image data, and perform qualitative and quantitative analysis on the extracted farmland shelterbelt data, obtain the structural parameters of farmland shelterbelt, and calculate according to the obtained farmland shelterbelt structure parameters The area of ​​farmland protection forest;

[0022] Step 3, using the reflectance spectrum characteristics of...

specific Embodiment approach 2

[0031] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the remote sensing image of the farmland shelterbelt is collected, and the remote sensing data is preprocessed on the collected remote sensing image. The preprocessing method includes radiation calibration, atmospheric correction and geometric correction. .

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment differs from Embodiment 2 in that: the acquisition of the structural parameters of the farmland shelterbelt includes the length of the farmland shelterbelt and the width of the farmland shelterbelt.

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Abstract

The invention discloses a farmland protection forest windproof effect metering method based on a spatial information technology, and belongs to the technical field of farmland protection forest planning. According to the invention, the problems that the accuracy of evaluating the windproof efficiency of the farmland protection forest is poor and the evaluation result is not suitable for guiding the design of the protection forest at present are solved. According to the method, the spatial information technology is used, the multi-spatial-scale and multi-time-scale characteristics of remote sensing are fully utilized, the remote sensing and geographic information system technology is combined to achieve rapid evaluation of the windproof efficiency of the farmland protection forest, meanwhile, the evaluation precision of the windproof efficiency of the farmland protection forest is improved, and the evaluation accuracy is guaranteed. It is found through experiments that the prediction precision of the farmland protection forest windproof efficiency index can reach 91.86%. Whether the protection forest space configuration is reasonable or not can be judged according to the evaluationresult, and guidance is provided for governments and protection forest construction departments. The method can be applied to planning of farmland protection forests.

Description

technical field [0001] The invention belongs to the technical field of farmland shelterbelt planning, and in particular relates to a method for measuring the windproof effect of farmland shelterbelts based on spatial information technology. Background technique [0002] Shelter forest is an important part of farmland ecosystem and plays an important role in farmland ecosystem. The density of shelterbelts and the spatial configuration pattern of shelterbelts determine their ability to protect farmland vegetation and directly affect their windbreak and sand-fixing capabilities for basic farmland. [0003] At present, domestic and foreign methods for evaluating the windbreak efficiency of farmland shelterbelts are mainly based on laboratory simulations or field observations. For example, wind tunnel tests or computer numerical simulations are used to analyze the windproof performance of shelterbelts. Or analyze the windproof performance of shelterbelts through field observati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
CPCG01N21/84
Inventor 杨曦光于颖舒展范文义
Owner NORTHEAST FORESTRY UNIVERSITY
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