江苏省城市建设用地扩展时空变化及驱动力研究

For the purpose of regional unbalanced development study, this paper chose 13 developed areas of prefecture-level cities and utilized GIS space analysis on construction land’s remote sensing data ranging from 1990 to 2010. Combined with existing expansion indexes, the current study proposed integrated expansion degree index model and made quantitative time-space expansion differentiation analysis. Then multiple linear regression method was used to analyze driving factors of differentiation. Results show that from 1990 to 2010, Jiangsu Province has experienced mode of rapid expansion-slow expansion -rapid expansion with obvious city differentiation. Integrated expansion degree shows strong-weak trend from South Jiangsu to North Jiangsu. Expansion focus has moved from river gathered to North Jiangsu and coastal area. Expansion differentiation has significant positive correlation with city's economic level, intensive degree, traffic location. Among them, economic level is the fundamental factor and intensive degree is the direct cause. Traffic location generates an important impact on formation of extension pattern.