jismart2024090: Neighborhood Classification and Thermal Environment Study Based on Early Urban Design Elements

Abstract

The urban thermal environment affects the sustainable development of cities, many studies have explored the influence of urban form on the thermal environment, but less attention has been paid to the scale effect of the form indicators, and at the same time, exploring a new classification system for neighborhoods is also beneficial to urban management. In this study, taking 1643 neighborhoods in Xi'an City as an example, considering the early elements of urban design, the areas outside the city wall and the historical conservation areas inside the city wall were separately clustered and analyzed by second-order clustering method, and the effects of development intensity indicators: building average height (BH), building density (BD), and floor area ratio (FAR) on LST within the buffer zone of 0-1000m were explored. The results show that: Xi'an is divided into 9 categories, 7 outside the city wall and 2 inside the city wall; the LST and development intensity of neighborhoods are significantly positively correlated; mainly in BD; there is a scale effect of BH, BD, and FAR on the LST, which has an effect in the range of 0-150m distance, and has the largest effect in 50m distance, which can explain 22.1% of the change of LST, compared with the increase of not considering the scale effect by 2.8%. This study can provide references and suggestions for city managers and urban planners to cope with thermal environment problems.