Urban ecological network structure toughness dynamic simulation method

Abstract

The invention discloses an urban ecological network structure toughness dynamic simulation method. The method comprises the following steps: constructing an urban ecological network according to species survey point data, remote sensing image data, water area wetland survey data and building height data; according to the importance index value corresponding to each source node in the urban ecological network, performing iterative removal on each source node according to a preset proportion, and determining toughness index values corresponding to the urban ecological network under different removal proportions; and determining an survivability threshold value corresponding to the urban ecological network according to the toughness index value. According to the invention, selection attack is carried out on each source-ground node according to the importance index value of each source-ground node in the urban ecological network and the preset proportion, and the toughness index values and the survivability thresholds corresponding to the urban ecological network under different removal proportions are determined, so that key source-ground nodes in the urban ecological network can be identified; the method is of great significance in maintaining ecological system stability and urban ecological safety.

Description

technical field [0001] The invention relates to the technical field of geographic information, in particular to a dynamic simulation method for urban ecological network structure resilience. Background technique [0002] Ecological network refers to the spatial organization system that can identify the characteristics of linear ecological corridors in a specific scale space, effectively connect various ecological patches, and reflect the combination rules of spatial elements and structural and functional characteristics. Ecological network structural resilience reflects the persistence of ecosystems in response to ecosystem changes caused by natural or human factors, and the study of ecological network structural resilience is of great significance for maintaining its normal functioning. Using graph theory and landscape ecology theories and methods to analyze the pattern and resilience of ecological space networks is a commonly used research method. The research objects of u...

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Problems solved by technology

[0004] Aiming at the above-mentioned defects of the prior art, the present invention provides a dynamic simulation method for urban ecological network structural resilience, which aims to solve the problem that there are few studies on the existing network structural resilience and urban ecological network structural resilience, and the lack of quantitative analysis methods for network stability. question

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