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<p>County-level eco-geological environmental quality assessment provides an important basis for identifying ecological conditions and optimizing territorial spatial patterns. Existing ecological quality assessments rarely incorporate geological conditions, while conventional single-path models cannot adequately capture multi-path connectivity under complex terrain. To address these gaps, this study develops a county-scale eco-geological environmental quality (EGEQ) assessment and spatial pattern optimization framework integrating AHP-CRITIC combined weighting with circuit theory and applies it to Arxan City in the central Greater Khingan Mountains, Inner Mongolia, China. Multi-temporal analysis shows that Grade IV–V areas expanded from 52.30% in 2015 to 65.19% in 2022, indicating a consistent improvement in eco-geological environmental quality. A total of 16 ecological corridors with a combined length of 332.56&#xa0;km, 11 pinch points, and 13 barrier points were identified, supporting a “one zone, one ring, multiple corridors” optimization pattern in which the core conservation zone covers 2,883&#xa0;km², accounting for 39% of the study area. The framework provides a replicable methodological reference and decision support for county-level ecological conservation and territorial spatial planning in geologically complex regions.</p>

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Research on the eco-geological environmental quality and spatial pattern optimization of Arxan City based on AHP-CRITIC method and circuit theory

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Chenyang Wu,
  • Chen Cao,
  • Kuanxing Zhu,
  • Ji Bai,
  • Zongzheng Li

摘要

County-level eco-geological environmental quality assessment provides an important basis for identifying ecological conditions and optimizing territorial spatial patterns. Existing ecological quality assessments rarely incorporate geological conditions, while conventional single-path models cannot adequately capture multi-path connectivity under complex terrain. To address these gaps, this study develops a county-scale eco-geological environmental quality (EGEQ) assessment and spatial pattern optimization framework integrating AHP-CRITIC combined weighting with circuit theory and applies it to Arxan City in the central Greater Khingan Mountains, Inner Mongolia, China. Multi-temporal analysis shows that Grade IV–V areas expanded from 52.30% in 2015 to 65.19% in 2022, indicating a consistent improvement in eco-geological environmental quality. A total of 16 ecological corridors with a combined length of 332.56 km, 11 pinch points, and 13 barrier points were identified, supporting a “one zone, one ring, multiple corridors” optimization pattern in which the core conservation zone covers 2,883 km², accounting for 39% of the study area. The framework provides a replicable methodological reference and decision support for county-level ecological conservation and territorial spatial planning in geologically complex regions.