基于MSPA和电路理论的珠三角核心城市通风廊道构建

Construction of ventilation corridors in core PRD cities based on MSPA and circuit theory

以珠三角核心城市为例,采用形态空间格局分析(MSPA)识别城市问题源,根据层次分析法建立阻力面,通过最短路径法构建城市通风廊道网络,基于电路理论识别通风廊道的“夹点”区域,制定优先破除策略。结果表明,城市问题源的核心面积占研究区总面积的9.32%,且大部分面积位于城市中心,中部连接度较高,四周较稀疏;在研究区中共识别出89条通风廊道,构成廊道的主要土地利用类型为不透水面、草地绿地和水体。MSPA方法与电路理论的结合可以更科学全面地识别各类城市问题源斑块,更合理地规划城市通风廊道。

The paper takes the core city of the Pearl River Delta as an example,uses the morphological spatial pattern analysis(MSPA)to identify the source of urban problems,establishes the resistance surface according to the analytic hierarchy process,constructs the urban ventilation corridor network through the shortest path method,and finally identifies the"pinch point"area of the ventilation corridor based on the circuit theory,and develops the priority removal strategy.The results show that the core area of urban problem sources accounts for 9.32%of the total area of the study area,and most of the area is located in the urban center,with high connectivity in the middle and sparse around the periphery.A total of 89 ventilation corridors were identified in the study area,and the main land use types of the corridors were impervious water surface,grassland green space and water body.The combination of MSPA method and circuit theory can identify all kinds of urban problem source patches more scientifically and comprehensively,so that urban ventilation corridors can be planned more reasonably.