基于POI数据的特大城市生态空间廊道识别与空间布局优化研究——以沈阳市中心城区为例

Study on Megalopolis Corridor Recognition and Spatial Layout Optimization Based on POI Data—Taking Shenyang Downtown as an Example

生态空间廊道作为城市生态空间生态信息、能量流动的重要通道,是城市可持续发展的基础所在。以沈阳市中心城区作为研究对象,利用POI数据识别出中心城区“三生空间”中的生态(混合)空间,在比较不同类型POI要素对生物信息流动产生阻力的基础上利用最小累计模型和重力模型识别生态空间廊道。结果表明,沈阳市中心城区可形成城市级、城市副级和区级共50条连接各生态斑块的生态空间廊道,且城市生态空间廊道具有环状、水平网络连接复杂、可连通大部分生态斑块等特征,但建设成本较高。最后根据各级生态空间廊道的规模、构成基础以及生态作用等提出了生态廊道网络优化和延伸生态空间供给等空间布局优化策略。

As a significant channel for the flow of information and capacity in urban ecological space sphere,ecological corridor plays a fundamental role in sustainable development of urban areas.Based on the case study of the downtown area of Shenyang City,the overlapping space of production-life-ecology circle is identified by using POI data.By comparing the resistance of various POI elements to bio-information flow,the minimum cumulative resistance and gravity method are applied to determine the ecological corridor.The research findings indicate that there can be 50 corridors connecting the ecological patches at city level,subcity level and district level in the downtown area of Shenyang City,which basically form a circular layout with complex horizontal network to link most of ecological patches;however,the cost of construction is pretty high.Finally,according to location,scale and features of all ecological corridors,the strategies to improve spatial structure,such as optimization of ecological corridor network and extension of ecological space supply,etc.,are put forward.