A dynamic simulation method for structural resilience of urban ecological network

Abstract

The invention discloses a method for dynamically simulating the structural toughness of an urban ecological network, comprising: constructing an urban ecological network based on species survey point data, remote sensing image data, water area and wetland survey data, and building height data; The importance index value corresponding to the node Iteratively remove each source node according to the preset ratio, and determine the corresponding resilience index value of the urban ecological network under different removal ratios; determine the corresponding invulnerability of the urban ecological network according to the resilience index value threshold. According to the importance index value of each source node in the urban ecological network and the selected attack on each source node according to the preset ratio, the present invention determines the corresponding resilience index value and indestructibility threshold of the urban ecological network under different removal ratios, Being able to identify the key source nodes in the urban ecological network is of great significance for maintaining the stability of the ecological system and the maintenance of urban ecological security.

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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