Gao et al.: Influence of urban construction landscape pattern on PM2.5 pollution: theory and demonstration – a case of the Pearl River Delta region - 7915 - INFLUENCE OF URBAN CONSTRUCTION LANDSCAPE PATTERN ON PM2.5 POLLUTION: THEORY AND DEMONSTRATION – A CASE OF THE PEARL RIVER DELTA REGION GAO, P.1,3 – YANG, Y. F.1,2 – LIANG, L. T.1,2* 1College of Environment and Planning, Henan University, Kaifeng 475004, China 2Key Laboratory of Digital Geography Technology Education of the Middle and Lower Reaches of the Yellow River, Henan University, Kaifeng 475004, China 3College of public administration, Nanjing Agricultural University, Nanjing 210095, China *Corresponding author e-mail:
[email protected] (Received 18th Mar 2020; accepted 20th Aug 2020) Abstract. With the continuous improvement of China's urbanization level, the huge expansion of construction land has a negative impact on urban air quality, especially PM2.5 pollution. In this paper, the relationship between the landscape pattern of urban construction land and PM2.5 concentration is studied by using spatial exploratory analysis (Moran I) and spatial econometric analysis (SLM/SEM). The results show that: ① From 2000 to 2016, PM2.5 pollution in the region of Pearl River Delta rose first and then dropped; In terms of spatial distribution, it showed a trend of high in the middle and low in the peripheral areas. ② The construction land in Pearl River Delta expanded obviously from 2000 to 2016, with the overall increase as high as 75.37%. At the same time, the advantages, integrity and accumulation of construction land patches in Pearl River Delta were strengthened continuously, while the degree of size breakage dropped to some extent.