Method for evaluating regional ecological sensitivity

A sensitivity analysis and regional technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of comprehensive evaluation and wide application range

Inactive Publication Date: 2010-11-24
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0007] However, there is no systematic induction of this method and formulating it into a complete method system. With the continuous enhancement of people's awareness of environmental and ecological protection, and the continuous improvement of living environment quality requirem

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  • Method for evaluating regional ecological sensitivity
  • Method for evaluating regional ecological sensitivity
  • Method for evaluating regional ecological sensitivity

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Embodiment 1

[0019] The main ecologically sensitive issues in a certain area are land desertification, salinization, soil erosion, wetland protection and cultural relics protection. The corresponding evaluation index system is established according to the influencing factors of each ecological environment problem, and then the sensitivity evaluation standard is determined and evaluated. The sensitivity grades are divided, as shown in Table 1. Finally, based on the GIS platform, the calculation methods such as direct overlay method or weighted overlay method are used to obtain the ecological environment sensitivity grading map of the study area, as shown in figure 1 shown

[0020] The ecological sensitivity value of this area is basically in the range between 1.12 and 3.61, with an average value of 1.72. The area of ​​sensitive areas accounts for 21.06% of the total area, the more sensitive areas account for 19.35% of the total area, the distribution of less sensitive areas is more, account...

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Abstract

The invention provides a GIS technology-based method for comprehensively evaluating regional ecological sensitivity aiming at the problem that more sensitive factors and spatial analysis are related existing in the conventional methods for evaluating the regional ecological sensitivity. The method comprises the three steps of: firstly, determining the type of possible ecological environment problems in the research region, and determining an ecological sensitive point; secondly, establishing an ecological sensitivity evaluation index system; and finally, after the ecological sensitivity evaluation standard is determined and the ecological sensitivity is graded, performing spatial summation of a environmental impact factor graph by a direct superposition method or weighted superposition method and the like based on the GIS technology so as to obtain a graded graph of the ecological environment sensitivity in the research region. The evaluation method is widely applied in various plans of ecological cities, such as a green land system, a landscape pattern, a natural ecological system, protection of biodiversity and an ecological preservation area. The method has the advantages of high efficiency, low cost, high precision and wide application range.

Description

technical field [0001] The invention relates to the fields of environmental science, urban ecological planning and management, in particular to a method for comprehensively evaluating the sensitivity of regional ecological environment to various ecological problems by using GIS technology. This evaluation method is widely used in the planning of regional industrial layout adjustment, ecological restoration and construction of nature reserves, as well as land use and biodiversity protection. Background technique [0002] With social development and technological progress, the scope and intensity of human influence on the natural environment are increasing, and the resulting regional ecological and environmental problems are also expanding and intensifying, such as desertification, soil erosion, salinization and acid rain, etc. . These regional eco-environmental problems are seriously threatening the atmosphere, land and water resources that human beings rely on for survival,...

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Application Information

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IPC IPC(8): G06F17/30
Inventor 杨志峰张力小
Owner BEIJING NORMAL UNIVERSITY
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