Dynamic Change and Interactive Mechanism of Residential Land and Farmland - A Case Study in Main City Zone, Tianjin

In this study, we take main city zone, Tianjin for example. Residential land and farmland is extracted based on MSS image in 1984 and TM image in 2011. And two data are analyzed using spatial modeling technology. The interactive change for 27 years is obtained. The results show that the area of residential land increases from 37.70×10³ hm² to 85.83×10³ hm², and the area of farmland decreases from 153.45×10³ hm² to 98.57×10³ hm². Among them, there is 5.76×10³ hm² residential land which converts into farmland, 50.84×10³ hm² farmland converts into residential land. This study can offer decision basis for making sustainable development of land in urbanized regions.