| 摘要: |
| 优化流域各尺度间蓝绿空间的嵌套构
建与协同规划技术，有助于解决丘陵城市规划
中蓝绿空间破碎、边界模糊、管控粗放等问题，
为蓝绿基础设施规划得到有效传导和合理实
施提供具体手段。研究构建了“次流域—小流
域—次小流域”各尺度间蓝绿空间协同优化的
框架，提出了多尺度蓝绿空间网络构建的规划
路径以及“衔接点—衔接结构—衔接单元”识
别的关键技术。以川中丘陵地区的典型城市资阳
为例，对多尺度蓝绿空间协同规划框架、技术路
径及关键技术的应用进行示例,为后续蓝绿基础
设施规划和建设提供技术参考。 |
| 关键词: 丘陵城市 蓝绿空间 蓝绿基础设施 生态规划 流域规划 多尺度 |
| DOI：10.13791/j.cnki.hsfwest.20230405 |
| 分类号: |
| 基金项目:国家自然科学基金面上项目（51878558）；亚洲开发
银行贷款四川资阳绿色转型发展项目（CS2） |
|
| Multi-Scale Collaborative Planning Path and Methods of Blue-Green Space for Hilly Cities: Taking Ziyang City as an Example |
|
ZHAO Wei,YANG Rui,WANG Qianna
|
| Abstract: |
| By systematically planning and constructing blue-green infrastructure, people can better
leverage the comprehensive benefits of blue-green space and improve the stability of urban and rural
ecosystems. At present, the most common problems are related to the fragmentation of blue-green
spatial planning and control as well as the lack of systematic infrastructure construction. These
problems exists in different watershed scales and in-between urban-rural areas. The blue-green
infrastructure construction of hilly cities is more strictly constrained while the edge features of the
blue-green space in hilly cities are more complex. Distinct characteristics at different watershed
scales also makes it more difficult to integrate and define boundaries in hilly cities. From the view
point of scale, the existing researches of blue-green space in China is in the process of transitioning
from a single scale to multiple scales, and the technical methods and guidelines are still limited to a
single scale. Currently, it is necessary to optimize the nesting and construction of blue-green spaces
between different scales in the watershed, and explore collaborative planning paths and technical
methods.
In response to the characteristics of blue-green space in hilly cities, this study constructed a
framework for collaborative optimization of blue-green space at various scales of “sub watershed small watershed-sub small watershed”. It also proposed a planning path for constructing a multi scale blue-green space network and key technologies for identifying and nesting “connection point connection structure- connection unit”. At the sub watershed scale, blue-green network recognition
is carried out based on ecological security and multi factor comprehensive evaluation. As for the
scale of small watershed, resistance surface recognition is carried out based on Morphological
Spatial Pattern Analysis, landscape connectivity evaluation, land refinement classification, and
nighttime light correction. This achieves the identification and nested optimization of key areas in
the blue-green space between the sub watershed and the urban small watershed, ensuring structural
rationality. The collaborative optimization path of “small watershed- sub small watershed” is
based on the evaluation of the potential for protection and utilization of blue-green space, and
the evaluation of the demand for ecosystem services in planning units. It identifies the priority of
potential blue-green space connection and the demand orientation for ecosystem service functions,
ensuring the effective connection and ecological function synergy of blue-green space between small
watershed and sub small watershed.
A typical hilly city in central Sichuan, Ziyang City, is taken as an example for completing the
proposed multi-scale blue-green spatial collaborative planning framework, technical paths, and
application of key technologies. Lack of synergy in the management methods of blue-green spatial
planning at different watershed scales is obvious. The blue-green spatial planning structure of the
rural and central urban area is fragmented, and the understanding of structural control areas and macro strategies are not clear. In particular, blue-green spatial unit planning ideas which based on ecosystem service needs does not exist. The multi-scale
blue-green spatial collaborative optimization framework of “sub watershed-small watershed-sub small watershed” constructed based on the situation of
Ziyang City can better adapt to the situation of large differences in blue-green spatial layout at different scales and difficult scale connection in hilly areas, and
respond to the problem of unclear planning techniques and approaches. At the scale of “sub watershed- small watershed”, the path integration approach for
constructing multi-scale blue-green spatial networks and the key technologies for identifying “connection point- connection structures-and connection units”
have been clarified; On the scale of “small watershed- sub small watershed”, it is established an evaluation system of potential protection and utilization of
blue-green space. The evaluation of planning unit ecosystem service needs based on blue-green space can identify the priority of potential blue-green space
connection and ensure effective connection of blue-green spaces at different scales.
The proposed multi-scale collaborative planning path and key technologies for blue-green space can adapt to the system construction and planning
control requirements of multi-scale blue-green space networks in hilly cities. The planning path considers the integration idea of nested construction of blue green spatial networks at different scales. It also proposed key technologies for identifying “connection point-connection structure-, and connection unit”, as
well as established the internal structural correlation of blue-green space. This structural space should be treated as an important blue-green spatial planning
and control area in hilly cities, based on the main ecosystem service needs of the central urban area at the scale of sub small watershed. It can fit streets and
sub small watershed boundaries as blue-green spatial planning units, determining the priority of potential blue-green space connection with the blue-green
spatial network. It also responds to the connectivity of the blue-green spatial network and meeting the practical needs of ecosystem services. The blue-green
space planning unit implements the requirements of the overall structural control area, connects the potential blue-green space resources within the unit. The
entire planning method effectively forms the transmission of planning indicators with the overall planning and detailed planning, achieving the systematic
construction and optimized utilization of blue-green infrastructure. |
| Key words: Hilly City Blue-green Space Blue-Green Infrastructure Ecological Planning Watershed Planning Multi-Scale |
