基于三维魔方模型的大运河沿线县域“三生”空间划定方法

Delineating Method of County Production-Living-Ecology Space in the Grand Canal Based on Three-dimensional Rubik's Cube Model

三维魔方模型是研判空间要素多功能优势度分区的量化方法,能够直观表征空间功能的最优组合模式,为精准识别大运河沿线县域国土空间功能提供关键技术支撑。以“三生”(生产-生活-生态)空间功能为切入点,建立大运河沿线县域“三生”功能适宜性评价体系;基于三维魔方模型提出“三生”空间范围划定规则,以大运河流域青县段为研究对象,划定“三生”空间范围并提出优化建议。结果表明:基于三维魔方模型建立的单项功能适宜性和多项功能适宜性组合的三生空间划定规则,划定了大运河流域青县的生态、生产、生活空间范围,占比分别为60.46%、33.52%、6.02%。其中生态空间主要分布在大运河两侧,包括550.58 km^(2)的生态功能高适宜和最高适宜空间,是大运河流域良好的生态本底;48.23 km^(2)生活、生产功能中适宜、低适宜和不适宜空间,是大运河流域未来生态修复的重点区域。该研究成果丰富了“三生”空间范围划定的方法与技术手段,为大运河流域国土空间治理和综合利用提供理论基础。

Three-dimensional Rubik's Cube model is a quantitative method to determine the multi-functional dominance of spatial elements,which can represent the optimal combination pattern of spatial functions.The method provides key technical support for identifying county spatial functions in the Grand Canal.The function suitability evaluation system for the functions of production-living-ecology space in counties along the Grand Canal has been established based on the spatial functions of production-living-ecology space.Based on the three-dimensional Rubik's Cube model,a rule for delineating the spatial scope of production-living-ecology space was proposed,with the Qingxian section of the Grand Canal basin as the research object.The spatial scope of production-living-ecology space was delineated and optimization suggestions were proposed.Results show that there are 60.46%,33.52%and 6.02%of ecology space,production space,and living space in Qing County,respectively.The scope is demarcated by the rules of single-function suitability and multiple-function suitability combination in the Grand Canal based on the three-dimensional Rubik's Cube model.The ecology space is mainly distributed on both sides of the Grand Canal,including 550.58 km^(2) of high and the highest suitable space,which is the best ecology background of the Grand Canal basin.The suitable,low suitable,and unsuitable space of the living and production functions of 48.23 km^(2) is the key area for ecological restoration in the Grand Canal Basin.These results enrich the methods and technical means of demarcating the scope of production-living-ecology space and provide a theoretical basis for the territorial space management and comprehensive utilization of the Grand Canal Basin.