Analysis on Driving Forces of Arable Land Changes in Chibi City and Arable Land Layout Optimization

Based on land and socio-economic data of Chibi city between 1998 and 2010,the dynamic change of local arable land were analyzed in the aspect of driving force and prospected by factor analysis and grey system prediction.Results showed that the overall trend of land quantity appeared downward first then upward,and driving forces mainly were economic factors,the internal structure of agriculture,social factors and so on suggestions for protecting arable land were put forward and the optimized design of arable land layout was proceeded base on that.