Urban ecological network construction method based on minimum cost distance model

Abstract

The invention discloses an urban ecological network construction method based on a minimum cost distance model. The urban ecological network construction method comprises the steps that firstly, land types are classified according to shot land remote sensing images, the resistance value of a resistance face corresponding to each land type is determined, ecological nodes are selected, land is reclassified according to ecological node data, and resistance grids are generated; secondly, the minimum cost distance between every two ecological nodes is circularly calculated with a space analysis minimum distance module of GIS software until a cost distance grid is obtained, and a landscape resistance face and the minimum cost path are generated according to the cost distance grid; thirdly, after the minimum cost distance between every two ecological nodes is extracted, an ecological corridor between the two ecological nodes is simulated, and an urban ecological network is structured with the ecological corridors. The urban ecological network construction method based on the minimum cost distance model is smaller in calculated quantity needed for structuring the ecological corridors with the minimum cost distance model, and is suitable for ecological network structuring in a larger range.

Description

technical field [0001] The invention relates to the technical field of ecological network construction, in particular to a method for constructing an urban network. Background technique [0002] The minimum cost distance is a calculation method of network analysis, which is used in species protection, functional planning of nature reserves, determination of animal habitats, regional ecological security pattern design, land and landscape use pattern, and urban green space construction planning etc. This model can measure a variety of spatial movement processes, and it essentially reflects the comprehensive resistance of heterogeneous landscapes to a certain spatial movement process. [0003] With the acceleration of urbanization, the expansion of cities leads to the encroachment or fragmentation of vegetation and green spaces. The direct consequence of this is the loss of species habitats and the reduction of biodiversity. The main function of ecological corridors is to pro...

AI Technical Summary

Problems solved by technology

Over time, researchers realized that it was not enough to protect habitats. Although some habitats were preserved in this way, they all became individual ecological islands objectively, and it was difficult to maintain normal species communities between different habitats. The circulation of matter and energy, the effect of maintaining species diversity is limited, and the role of ecological corridors in species conservation cannot be ignored

Although people have realized the importance of constructing and improving the ecological network by establishing ecological corridors, the current identification and extraction methods for ecological corridors mainly include EcoNet software for simulating and analyzing the characteristics of ecological networks, and ecological network analysis software developed using Matlab language. In addition, there are Ecopath, Wand software and other methods, but these software are difficult to obtain, costly, or complicated to operate

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