Urban expansion and driving force analysis of Jinan city based on multi-source data: Fid-Bau Portal

Urban expansion and driving force analysis of Jinan city based on multi-source data

Zhang, Z. M. / Ji, M. / Zhang, L. G. / Jin, F. X.

Since 2000, China has witnessed rapid social and economic development and rapid improvement of urbanization level. Analyzing the driving force of urban construction land expansion is an important basis for predicting the future expansion of urban construction land. This study uses EVI, DMSP/OLS and Luojia1-01 nighttime remote sensing data products to extract the urban construction land range of Jinan from 2000 to 2018. The evolution process of urbanization is characterized by three indicators: AGR, elastic coefficient and city compactness. The migration of urban center is analyzed by standard deviation ellipse. Combined with the statistical yearbook data over the years, the driving mechanism of urbanization is analyzed by using geographic detector model from the perspectives of economic construction, social development, infrastructure and environment. The results show that: since 2003, Jinan city has a trend of scattered expansion, and the overall expansion direction is obvious. From 2003 to 2008, the urban expansion speed is faster, followed by 2013 to 2018, and the expansion speed is slower from 2008 to 2013. The urban compactness decreases with the increase of construction land area, and the urban center move to the east by slightly north. The urban expansion is mainly driven by economy, mainly in GDP growth, industrial structure optimization, economic opening policy, followed by population and transportation facilities, and there is a two-factor enhanced relationship between the indicators.