武汉城市圈国土空间综合功能分区

Comprehensive function zoning of national land space for Wuhan metropolitan region

以武汉城市圈为典型案例区开展国土空间综合功能分区实证研究。首先基于县域土地利用数据、社会经济数据和补充调查数据,从生产、生活和生态(三生)功能角度遴选出表征国土空间不同主题要素的24个指标因子,构建基于"要素—功能"的评价指标体系;然后从评价单元开始对10类空间二级功能进行比例关系表达,并通过BP神经网络方法评价三生功能承载力;最后引入双约束聚类法划定国土空间综合功能区,并匹配相应的调控政策。研究表明:基于统一的功能分类和指标体系实现功能比例表达在不同尺度间传递;武汉城市圈国土空间可划分为3个一级综合功能区和7个二级综合功能区。研究成果可为武汉城市圈国土空间格局优化提供参考。

Comprehensive function zoning of national land space plays a significant role in optimizing development and spatial pattern of national land space. Taking Wuhan metropolitan region as a case study area, we performed an empirical study of the comprehensive function zoning of land space. Firstly, from the perspective of production, livelihood, and ecology functions, we selected 24 indicators to represent multiple thematic elements, such as land resources, water resources, eco-environment, and socio-economic factors. Second, we built up an evaluation system based on these factors and functions. We then calculated and presented the percentages of 10 kinds of sub-functions （namely, supply of primary, secondary, and tertiary products, provision of forestry, livestock, and aquatic products, supply of mineral resources, urban and rural residence, and ecological regulation） for the evaluated units. Next, we evaluated the carrying capacity of the production-livelihood-ecology function provided by national land space using the BP neural network approach. Finally, with dual-constraint spatial cluster algorithm, we confirmed the final comprehensive function zones of national land space, and correspondingly provided specific regional regulation policies and implication for each function zone. Theoretically, in this study, based on these 10 key functions of national land space and the consistent indicators and evaluation system, we initially presented the multiple functions of the zones in percentages from the county level, and then scaled up to the city level, which facilitates the integration and disaggregation of multiple functions for zones across levels. Practically, the results showed that Wuhan metropolitan region can be divided into western production-livelihood zone, northeast production-ecology zone, and southeast livelihood-ecology zone at the first level, and seven sub-zones at the second level. Furthermore, four corresponding types of policy, including ＂key protection＂, ＂general protection＂, ＂general development＂ and ＂key development＂, were attached to each sub-zone. This study will shed light on theoretical framework and practices of national land planning and national land resources regulation, and also provide reference forland development pattern and optimal allocation of land resources for Wuhan metropolitan region.