Impact of polycentric development on urban environment in China: The case of Chengdu and Chongqing

Authors: Yong Liu*, Chongqing University
Topics: Urban Geography
Keywords: polycentric; urban form; urban heat island
Session Type: Paper
Day: 4/6/2019
Start / End Time: 5:00 PM / 6:40 PM
Room: Senate Room, Omni, West
Presentation File: No File Uploaded

To mitigate the degradation of urban environment associated with the increase of urban size, many Chinese cities have chosen the strategy of transforming monocentric urban form to polycentric one in their spatial planning. However, limited studies have examined the impacts of urban spatial restructuring on urban thermal environment in China. In this study, we investigated the impact of the evolving urban forms on the intensity of urban heat island (UHI) in different periods, using the case study of Chengdu and Chongqing. We found that the intensity of UHI is positively correlated with the contiguity of urban development in both cities. The natural separations and planned green belts showed low intensity of UHI, and intense urban areas in valley floors exhibited high intensity. With the development of polycentricity over time, the UHI intensity in the central area decreased when the urbanized area is dispersed, but the intensity in the peripheral areas increased simultaneously.

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