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[1]Taking Chongqing Metropolitan Area as an Example.Construction of Ecological Security Pattern in Very Large Mountainous City Based on Circuit Theory[J].Research of Soil and Water Conservation,2021,28(02):319-325+334.

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Construction of Ecological Security Pattern in Very Large Mountainous City Based on Circuit Theory

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 02 Page number: 319-325+334 Column: Public date: 2021-02-06

Title:: Construction of Ecological Security Pattern in Very Large Mountainous City Based on Circuit Theory

Author(s):: —Taking Chongqing Metropolitan Area as an Example; (1.College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China; 2.Chongqing Key Laboratory of Spatial Data Mining and Big Data Integration for Ecology and Environment, Chongqing 401320, China; 3.School of Public Administration, Chongqing Technology and Business University, Chongqing 400067, China)

Keywords:: extra-large mountainous cities; Chongqing metropolitan area; circuit theory; ecological security pattern

CLC:: X321

DOI:: -

Abstract:: In order to ensure the ecological safety of mountainous cities and achieve sustainable development, the Chongqing metropolitan area was used as the research area, and the land use status data and remote sensing data in 2018 were used to construct an evaluation system for the importance of ecological services and ecological sensitivity, and the granularity was reversed. The method measured the grid granularity of the optimal conditions to comprehensively determine the ecological source; the resistance value was determined by slope, undulation, and land use type, and the ecological corridor was constructed by the circuit theory, which finally formed the ecological security pattern of Chongqing urban area. The results showed that:(1)the connectivity is optimal at 200 granularity. The ecological source area under this granularity is 1 616.98 km², accounting for 29.76% of the total area of the study area, showing a six-vertical distribution in spatial distribution.(2)there are a total of 29 ecological corridors between ecological sources, 22 key corridors with a total length of about 50.83 km, and 7 potential corridors with a total length of about 108.21 km.(3)ecological sources and ecology corridors constitute an ecological security pattern of ‘one circle, two belts and two centers'. It was necessary to set up ecological promotion belts to effectively protect the ecological space in the region.

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Last Update: 2021-02-10