公园城市边缘区“自然-农业公园”环带规划研究

The park city emphasizes the stability of regional ecosystem maintenance and the improvement of environmental service supply efficiency, the construction of park belt linking urban and rural green spaces promotes its connotation and external image. Small-scale agriculture and forestry land in urban fringe is an important component of park belt’s mesh space, having high heterogeneity in habitat type and landscape characteristics, and its potential of composite service is high. But the characteristics such as small patch size and scattered layout, make it not valued by the existing planning and control, causing the internal connection of environmental elements are separated and serious land encroachment, and affecting the function of park belt. The project is based on the natural ecological process carrying space pattern, superimposing the urban and rural gradient space and functional differentiation, responding to ecosystem overall protection and service improvement appeal and existing problems, and researching on the control technology methods of “nature-agriculture park” belt planning that takes into account the protection and utilization of small-scale agricultural and forestry land in the marginal area: 1) putting forward the land selection strategy, which respects the land use intrinsic attributes and emphasizes the maintenance of natural process; 2) constructing an agriculture and forestry landscape network method to improve ecosystem service efficiency which integrates the park belt space system; 3) proposing the construction guidance of park hub unit which takes into account the natural ecological protection and urban composite utilization. The project is aim to explore high-efficiency protection route for high-value small-scale agriculture and forestry land in urban fringe, and to promote the quality and service of park city’s green space.

公园城市强调区域生态系统稳定维持及环境服务供给效能提升，联系城乡绿色空间的公园环带建设促其内涵及外在形象表达。城市边缘区小规模农林用地是公园环带网状空间的重要组分，在生境类型、景观特征等方面具有高度异质性，复合服务潜能较高，但斑块规模小、布局分散等特征使其未受既有规划管控重视，环境要素内在联系割裂及用地蚕食严重，影响公园环带功能发挥。课题立足于自然生态过程承载空间格局，叠加城乡梯度空间及功能分异，响应生态系统整体保护与服务提升诉求及存在问题，展开兼顾边缘区小规模农林用地保护与利用的“自然-农业公园”环带规划管控技术方法研究：1）尊重用地内在属性且强调自然过程维持的用地选择策略；2）融合公园环带空间体系、提高系统服务效能的农林景观网络构建方法；3）兼顾自然生态保护及城市复合利用的公园枢纽单元建设引导。旨在探讨城市边缘区高价值小规模农林用地高效保护路径，促进公园城市绿色空间品质与服务提升。

公园城市建设是生态文明思想在空间上的落地表达，强调区域生态系统稳定维持及环境服务供给效能提升，联系城乡绿色空间的公园环带构建促其规划目标实现。城市边缘区小规模农林用地是公园环带网状空间的重要组分，在生境类型、景观特征等方面具有高度异质性，复合服务潜能较高，但斑块规模小、布局分散等特征使其未受既有规划管控重视，环境要素内在联系割裂及用地蚕食严重，影响公园环带功能发挥。课题充分认知城市边缘区小规模农林用地空间及功能特征，梳理农林资源保护利用面临的现状问题与既有用地管控措施存在的不足。在此基础上，立足于区域自然生态过程承载空间格局，叠加城乡梯度空间及功能分异，响应生态系统整体保护与服务提升诉求及存在问题，展开兼顾城市边缘区小规模农林用地保护与利用的“自然-农业公园”环带规划管控技术方法研究：（1）通过遥感数据提取分析及现场走访调研，明确城市边缘区小规模农林用地存在的主要形式及空间、功能特征；（2）根据生态系统整体保护与城乡服务诉求研究，甑别既有规划管控措施存在缺口与不足，同时强化城市边缘区小规模农林用地复合功能认知；（3）基于城市边缘区小规模农林用地功能发挥的空间基础分析，提出尊重用地内在属性且强调自然过程维持的用地评价及高价值用地选择策略；（4）分析城市边缘区小规模农林用地保护与公园环带建设的相互促进关系，提出融合公园环带空间体系、提高系统服务效能的农林景观网络构建及小规模农林用地保护方法；（5）结合案例分析与理论研究，从自然生态维育及城乡服务功能发挥视角出发，提出“自然-农业公园”环带建设及用地保护利用引导。旨在探讨城市边缘区高价值小规模农林用地高效保护与管控路径，弥补孤立式生态空间保护效果的不足，促进公园城市绿色空间品质与服务提升。