县域三生空间多尺度划定与功能主导性研究

A Study of Multi-scale Demarcation and Function Domination of the Production,Living and Ecological Space at County Level

【目的】以湖口县为例,探索分析三生空间的尺度依赖性与功能主导性,为县域国土空间规划的科学编制与国土空间的可持续利用提供借鉴。【方法】采用多尺度格网分析、综合指标体系评价法。【结果】(1)湖口县三生空间生产空间占比最大,生态空间占比第二,生活空间占比最小。生态空间主要集中分布于县域东南部和西部,生产空间主要分布于县域中部,生活空间集中分布于县域北部主城区和各乡镇镇区;(2)三生空间的地类构成呈明显差异,生态空间地类构成较为统一集中,生产空间和生活空间地类构成更为分散多样;(3)三生空间划分总体上对尺度依赖性较低,生态空间和生产空间的划分尺度依赖性较小,生活空间的划分尺度依赖性较大;(4)湖口县三生空间主导功能一般明显及以下区域面积占44.41%,而主导功能明显与极明显区域占27.58%,说明湖口县国土空间主导功能还不够显著,有较大优化空间。【结论】从土地功能视角构建三生空间评价体系,基于GIS空间分析功能多尺度划分三生空间,能科学揭示县域三生空间的尺度依赖性、功能主导性特征。

[Objective]The purpose of this study is to explore and analyze the scale dependence and func-tion dominance of the production,living and ecological space(PLES)in Hukou County,and provide some refer-ences for the land space spatial planning and the sustainable utilization of the land space at county level.[Method]By means of multi-scale grid analysis and comprehensive index system evaluation method.[Result]The results are as follows.(1)Hukou County has the largest space proportion of production,the second is ecological space and the smallest one is living space.The ecological space is mainly distributed in the southeast and west of the county,the production space is mainly distributed in the middle of the county,and the living space is concentrated in the main urban areas and towns in the northern part of the county.(2)The land use composition of PLES is obviously different.The composition of ecological space is relatively unified and concentrated,while the composition of production space and living space is more dispersed and diverse.(3)On the whole,the demarcation of the PLES has a low dependence on the scale.Comparatively,the ecological space and production space are less dependent on scale while living space is more.(4)In Hukou County,the area of the less obvious dominant function accounts for 44.41%,while the area of obvious and extremely obvious dominant function accounts for 27.58%,indicating that the dominant function of the land space in Hukou County is not significant enough,and there is more room for optimization.[Conclusion]In conclusion,from the perspective of land functions the evaluation system of PLES is established,and then the PLES is demarcated on multi-scale based on GIS spatial analysis.It can scientifically reveal the scale dependence and function dominance of the PLES at county level.