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Chinese Agricultural Science Bulletin ›› 2026, Vol. 42 ›› Issue (17): 209-218.doi: 10.11924/j.issn.1000-6850.casb2026-0198

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Research on Spatial Differentiation Characteristics of Rural Residential Areas Based on Analysis of Landscape Index Granularity Effects: A Case Study of Hanyuan County

DENG Yunsi1(), LIU Zhibin1, FANG Yingxuan2, LI Jun1, PENG Xinghong1, WANG Weiwei1, MU Yu1, XIA Jianguo2,3, GAO Xuesong2,3, YANG Bo1()   

  1. 1 Sichuan Provincial Land Consolidation Center/ Key Laboratory of Farmland Quality and Monitoring for Land Consolidation, Ministry of Natural Resources, Chengdu 611130
    2 College of Resources, Sichuan Agricultural University, Chengdu 611130
    3 Key Laboratory of Cadastral Resources Investigation, Monitoring and Utilization, Ministry of Natural Resources, Chengdu 611130
  • Received:2026-03-16 Revised:2026-07-10 Online:2026-09-15 Published:2026-09-09

Abstract:

This study aims to provide references for rural planning, spatial layout optimization and land use in Hanyuan County. By analyzing the granularity effect of different granularity landscape indices, and based on the determination of the optimal granularity, combined with landscape pattern and spatial analysis methods, the spatial differentiation characteristics of rural settlements in Hanyuan County were studied. The results showed: (1) the appropriate granularity range for the spatial differentiation characteristics of rural settlements in Hanyuan County is 50-70 m, and the optimal spatial granularity is 60m. (2) The distribution of rural settlements in Hanyuan County is in a northwest-southeast direction. The weighted center of the rural settlement patches is located within Tangjia Town, indicating that this area is the center of gravity of the patch area distribution of rural settlements. And there is a clustering distribution phenomenon in the central area of rural settlements. (3) The high-density areas of rural settlements in Hanyuan County are concentrated in Yidong Town, Jiuxiang Town, Tangjia Town, Fulin Town, Fuquan Town, Anle Town and Dashu Town, showing a feature of settlement clustering along the river. (4) Rural settlements in Hanyuan County show a high degree of aggregation. Only Yidong Town, Jiuxiang Town, Dashu Town and Tangjia Town have relatively high separation indices, which are 714.35, 700.02, 451.33 and 350.19 respectively, and the dispersion degree of rural settlement patches in these areas is high. In summary, the spatial distribution of rural settlements in Hanyuan County shows the characteristics of ‘high aggregation, less dispersion’. The spatial distribution pattern is significantly affected by topography and geomorphology, with the dense distribution of low mountain valley areas and the sparse distribution of high mountain areas as the main characteristics. The research results provide valuable reference information for rural development planning and land use management in Hanyuan County.

Key words: rural settlements, granularity effect, spatial differentiation, landscape index

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