Assessment of Ventilation Potential and Construction of Wind Corridors in Chengdu City Based on Multi-Source Data and Multi-Model Analysis

Xiaojiang Xia, Ling Jian (), Kaiji Ouyang, Xiuying Liu, Xuewen Liang, Yang Zhang and Bojia Li
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Xiaojiang Xia: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Ling Jian: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Kaiji Ouyang: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Xiuying Liu: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Xuewen Liang: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Yang Zhang: School of Architecture, Southeast University, Nanjing 210096, China
Bojia Li: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China

Land, 2024, vol. 13, issue 10, 1-29

Abstract: The establishment of urban ventilation corridors (UVCs) aims to mitigate the urban heat island effect. While most studies focus on the construction and assessment of the environmental benefit of UVCs, they often overlook the analysis of UVCs’ topological features. This research integrates multi-source data including 3D urban buildings, historical meteorological observations, high-resolution remote sensing, and land use planning, combined with multiple models, including geographic information system spatial analysis, circuit theory, and complex networks. Based on an assessment of urban ventilation potential, the circuit model was applied to extract UVCs aligned with the prevailing wind direction for both summer and winter seasons. Complex network modeling was employed to analyze the topological features of the ventilation network. From the analytical results, a multi-level wind corridor system for Chengdu was quantitatively developed. The results indicate that the city’s overall ventilation resistance is high, with notable spatial clustering, and the southeastern region faces substantial ventilation obstructions. A total of 143 critical ventilation nodes were identified, with the number of air inlets and outlets in summer being significantly fewer than in winter. However, the cooling effect of ventilation corridors in the prevailing summer wind direction is superior to that in winter. The ventilation network comprises 16 communities with distinct ventilation characteristics, exhibiting moderate connectivity, lacking small-world properties, and showing congestion and instability.

Keywords: urban ventilation corridors; ventilation potential; circuit theory; complex network modeling; topological feature; urban heat island effect (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
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