Mechanism Research on Evolution and Driving Forces of Land Use Structure in Guiyang City Based on Principle Components Analysis

In order to research the land use change, analyze the driving mechanism, and to provide reference for sustainable land use of the district, by analyzing ten years land use data and social economic data of Guiyang in 2003-2012, by using dynamic degree model, land use degree model and principal component analysis method, the factors of land use change and driving force were researched. The results showed that :(1) the land use change of Guiyang city was relatively obvious during the 10 years, the cultivated land area decreased annually, the forest land, unused land changed prominently, in the 10 years the land use was in a period of development;(2) social economic development level, population, living standard of people and technology, capital investment power have significant influence to the change of cultivated land area, while the efficiency of agricultural production and industrial structure have certain effect to the change of cultivated land area.