Analyzing the influence of urban morphological features on pedestrian thermal comfort

Xintong Ma, T. M. Leung, C. K. Chau, Esther H.K. Yung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

This paper studied the temporal effect of urban morphological features on the pedestrian thermal comfort of a street with aid of ENVI-met model. The results show that the presence of surrounding buildings could bring drops in the average PET values of the sidewalks by up to 6.7 °C. The hourly PET values also varied considerably with neighborhood compactness, surrounding building height configuration and layout form, and their effects on thermal comfort varied considerably between E-W and non-E-W Streets. In addition, multivariate models have been formulated separately for E-W and non-E-W Streets to predict the hourly PET values based on urban morphological features and microclimatic conditions. Based upon the PET values computed from the models, a series of charts have been generated to help visually determine the total number of comfort and very hot hours that will be yielded during daytime for a street being surrounded by different combinations of urban morphological features. It was observed that a minimum of 3 comfort hours could be achieved when SH/h ratio ≥ 1.8 and BCR ≥ 47% regardless of street orientation or layout form. The findings provide valuable insights for urban planners and designers in creating thermally comfortable street environments.

Original languageEnglish
Article number101192
JournalUrban Climate
Volume44
DOIs
Publication statusPublished - Jul 2022

Keywords

  • Pedestrian thermal comfort
  • Street orientation
  • Urban morphology
  • Urban street design

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Environmental Science (miscellaneous)
  • Urban Studies
  • Atmospheric Science

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