城市绿道网集约化布局的空间调控机理量化研究

Following the planning guideline of optimal and intensive land use, to establish the intensive layout becomes an urgent task for the urban greenway network planning. However, because of the diverse service functions the geenway owns and the strong dependence on the linear spatial element (e.g. urban street, river) during the greenway planning， it is quite difficult in current to make definition and measurement on the layout intensity of the greenway network. Meanwhile, due to these factors, to achieve the intensive layout of greenway network would not only be influenced by its own network structure, but also be restricted by the entire urban spatial context, which largely increases the difficulties in the space regulation during the greenway network planning. Correspondingly, from the viewpoint of the urban space integration and coordination, this project carried out the scientific research relying on the quantitative technology and set the focus on the space regulatory mechanism driving to the intensive layout of greenway network in the planning. In the beginning, the research explored the quantization approach and its analysis method of greenway network layout intensity by the establishment of the comprehensive quantization model. Next, on the aspects of greenway network structure and the urban spatial context, an quantitative analysis was made on the spatial factors and its action law affecting the layout intensity of greenway network, from which the space regulatory mechanism driving to the intensive layout of greenway network was derived. In the end, on the digital software platform, the space regulatory mechanism was verified and revised. The implementation and completion of this project would provide the technical support for the layout intensity definition and measurement of the greenway network and the corresponding space regulation in the planning.

在节约集约用地的规划导向下，城市绿道网集约化布局已为迫切需求。但由于城市绿道网具有多元化的服务功能，且需依托线性空间要素(如道路、河流等)进行布局，使得界定和衡量其布局集约度在当前仍是难题，也造成城市绿道网集约化布局受到自身网络结构特征和城市空间环境特征的双重制约，给规划空间调控带来了难度。为此，本项目从城市整体空间整合与协调的角度出发，依托量化技术对城市绿道网的空间调控机理展开科学研究。项目首先通过量化模型的建立来探讨城市绿道网布局集约度的量化途径和分析方法，其次结合多个案例从城市绿道网络结构特征和城市空间环境特征两方面来定量分析城市绿道网布局集约度的影响因素类型及其作用规律，由此推导其集约化布局的空间调控机理，最后在数字软件平台上对空间调控机理进行验证与修正。项目的顺利实施将能为城市绿道网集约化布局规划实践的开展奠定技术基础。

在集约用地规划导向下，城市绿道网集约化布局已为迫切需求。但由于城市绿道网具有多元化服务功能，且需依托线性空间要素(如道路、河流等)进行布局，使界定和衡量其布局集约度在当前仍是难题，也造成城市绿道网集约化布局受到自身网络结构特征和城市空间环境特征的双重制约，给规划空间调控带来了难度。为此，本项目从城市整体空间整合与协调的角度出发，依托量化技术对城市绿道网的空间调控机理展开科学研究。.在城市绿道网功能服务特征、空间结构特征以及城市空间环境对城市绿道网布局的作用特征的研究基础上，项目对城市绿道网功能与布局特征的量化途径展开探讨。通过研究城市绿道网布局集约度、网络结构特征与城市空间环境特征的量化指标体系以及布局集约度量化指标的权重赋值，在此基础上建立综合量化模型。以南京、佛山等城市典型绿道或绿道系统为例，利用综合量化模型对案例进行定量分析，研究城市绿道网布局集约度的空间影响因素类型及其作用规律。最后以东营中心城区为例，根据空间调控机理对案例城市绿道网布局进行集约化空间调控模拟，对城市绿道网的综合量化模型和空间调控机理进行反馈、验证和修正。.研究建立了指导城市绿道网集约布局的综合量化模型，在实践中可被转换为绿道选线潜力定量评价模型，涵盖游憩吸引力、游憩需求强度、绿道建设适宜度三大指标体系，为绿道规划选线提供依据，并成为城市绿道网高效合理布局提供量化指导工具，能够直接应用于我国正在蓬勃开展的城市绿道网规划建设实践。同时，提出了城市绿道空间特征和服务绩效的量化方法，并建立了定量工具来研究城市空间环境以及绿道内部空间特征对城市绿道的影响作用规律。以此为基础，通过一系列案例的分析研究在数字软件平台上探索出了一套针对城市绿道网集约布局的定量调控方法和技术，能够广泛应用于其他同类型实践。