Original scientific paper

https://doi.org/10.17559/TV-20170508154351

Scale response of summer urban heat island to building plot ratio and its warning parameter

Huanchun Huang ; School of Architecture and Urban Planning, Nanjing University, College of Landscape Architecture, Nanjing Forestry University, No. 159 Lonpan Road, Nanjing, 210037, Jiangsu, P. R. China
Yingxia Yun ; School of Architecture, Tianjin University, No. 92 Weijin Road, Nankai District, 300072, Tianjin, P. R. China
Jiangang Xu ; School of Architecture and Urban Planning, Nanjing University, 22 Hankou Road, Gulou District, Nanjing, Jiangsu Province, 210093, Jiangsu Province, P. R. China
Rong Huang ; College of Landscape Architecture, Nanjing Forestry University, No.159 Lonpan Road, Nanjing, 210037, Jiangsu, P. R. China
Jing Fu ; Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
Kaidi Huang ; College of Landscape Architecture, Nanjing Forestry University, No.159 Lonpan Road, Nanjing, 210037, Jiangsu, P. R. China

Abstract

Plot ratio is an important indicator of architectural layout that affects urban heat island (UHI). Previous studies focus on street height/weight ratio, building density, and other indicators related to plot ratio but fail to effectively describe the time-space relationship between plot ratio and UHI and accurately guide the planning and design to reduce the UHI in the effective scale. The scale sensitivity method was proposed to study the time-space response of UHI to plot ratio to control the UHI intensity (UHII) caused by plot ratio during planning and design in a reasonable scale. The sensitivity of plot ratios in different space scales to UHI in the daytime was repeatedly calculated on 3S technology, MATLAB, SPSS, and other data analysis platforms based on the scale theory of landscape ecology and the method of geo-statistics analysis. The change curve of the response of plot ratio on UHI in the most sensitive space scale was discussed. The prevention and control standard of summer UHI was then constructed in accordance with the temperature in dog days of summer, human physiological reaction under high temperature, and relevant national regulations. The warning control was taken on the parameters of plot ratio on the basis of the temperature rise of UHI caused by plot ratio. Results show that scale sensitivity exists between plot ratio and UHI. In the daytime, the relationship between core plot ratio and summer UHI shifts from negative correlation to positive correlation. The temperature-rising effect in the afternoon is greater than the cooling effect in the morning. Core plot ratio has a linear relationship with summer UHII. The increase in the average core plot ratio reduces the UHII by 0,76 °C in the morning and increases it by 0,97 °C in the afternoon. The optimal sensitive radius of the core plot ratio on summer UHI is 230 m. The response mechanism of plot ratio on UHI is mainly due to heat storage volume and block to radiation heat. The study conclusion can provide scientific theoretical parameter support for architectural design and urban planning and design.

Keywords

core plot ratio; scale sensitivity; summer; UHII; warning parameter

Hrčak ID:

183050

URI

https://hrcak.srce.hr/183050

Publication date:

15.6.2017.

Article data in other languages: croatian

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