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“三生”功能供需匹配视角下的国土综合整治与生态修复模式优化

Optimization of comprehensive land consolidation and ecological restoration pattern from the perspective of supply and demand matching of “ production-living-ecological ” functions

  • 摘要: 国土综合整治与生态修复模式划分对优化国土空间格局、推动生态文明建设具有积极的促进作用。该研究以新疆维吾尔自治区阿克苏地区温宿县为例,构建“三生”功能供需与国土综合整治与生态修复的理论关系框架,基于土地利用、土壤、气象和社会经济等多源数据,评估“三生”功能供需状况,引入比较优势指数识别“三生”功能供需优势功能,搭建“三生”功能供需耦合模型解析“三生”功能供需匹配关系,提炼区域国土综合整治与生态修复模式。结果表明:1)温宿县“三生”功能供需表现出显著空间异质性,供需优势功能呈现“单核主导-双核协同”的空间分布特点。2)温宿县“三生”功能供需匹配类型空间上分布不均衡,北部山地以供需完全匹配型为主,面积为8908.48 km2,占研究区总面积的62.25%;南部地区多为供需低度匹配型或供需错配型,面积分别为1911.812878.80 km2,占研究区总面积的13.36%和20.12%。3)温宿县可以划分为生产功能巩固与现代化发展、生态本底优化与监测管护、生产-生活资源集约增效、生产-生态资源协同开发、生活-生态功能韧性提升、“三生”功能融合发展6种整治修复模式,各模式的整治修复要点不同。该研究可以丰富国土综合整治与生态修复模式识别方法,并为县域尺度国土综合整治与生态修复工作及相关规划的制定与工程实施提供技术支持。

     

    Abstract: Land consolidation and ecological restoration are often required to optimize the spatial pattern in rural civilization. In this study, a theoretical framework was constructed to clarify the relationship between the supply and demand of the "production-living-ecological" functions, land consolidation, and ecological restoration. A case study was taken from Wensu County in Aksu Prefecture, Xinjiang Uygur Autonomous Region, China. Multi-source data was captured, such as the land use, soil, meteorology, and socio-economic data. A systematic evaluation was then performed on the supply and demand of the "production-living-ecological" functions. The comparative advantage index was also introduced to identify the advantage functions and matching relationship of the supply and demand of the "production-living-ecological" functions. Finally, a coupled model was established to refine the pattern of the regional land consolidation and ecological restoration. The results show that: 1) There was significant spatial heterogeneity in the supply and demand of the "production-living-ecological" functions. The supply of the production function was characterized by a high distribution in the south and a low distribution in the north. While the supply of the living function in the southeast and southwest regions was slightly higher than that in the northeast. And the supply of the ecological function was higher in the north than in the south. The demand for the production function decreased from the southwest to the northeast. A concentric-circle spatial attenuation was also observed in the demand for the living function. And the demand for the ecological function shared a higher distribution in the north than in the south. The supply and demand of the advantage functions also showed the spatial distribution of the "single-core dominance - double-core synergy". 2) The spatial distribution was unbalanced on the matching types of the supply and demand for the “production-living-ecological” functions. The northern mountainous areas were dominated by the full matching type of the supply and demand. Especially, there was a high degree of consistency between the supply and demand of the ecological functions. While the southern areas were mostly low-matching or mismatching types of supply and demand. There was strong pressure from rapid urbanization and the intensified agriculture on the national land resources. The preliminary patterns of the land consolidation and ecological restoration were obtained as the function consolidation optimization, supply function leading, demand function driven, and two-way function adaptation. 3) The natural background was combined with the socio-economic characteristics and land spatial planning. The preliminary patterns were optimized for land consolidation and ecological restoration. Six patterns were finally identified: consolidation of production function and modernization, ecological background optimization and monitoring, production-living resource intensive efficiency, production-ecological resource collaboration, living-ecological function resilience improvement, and "production-living-ecological" function integration pattern. This finding can enrich the pattern identification for the county-scale land consolidation and ecological restoration of land space. The technical support can also offer decision-making on the optimal layout of the land space and the quality of regional ecosystems.

     

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