The Evolution of Spatial Structure of Urban Poverty Pattern during the Period of Transition——A Case of Xi'an City
基于西安市住户收支调查数据，分析了1990-2011年城市贫困的总体趋势和个体动态，揭示了贫困空间结构的演变模式，发现内城贫困回潮与扇形、圈层复合结构。
Based on survey data of household income and expenditure in Xi'an,adopting the methods of F-G-T index and transfer matrix,this paper analyzes the trends of poverty in the Transition Period in Xi'an respectively from the perspective of overall macroscopic and individual microscopic,and reveals the spatial pattern of dynamic evolution. The results show that:(1) from 1990 to 2011,the urban poverty in Xi'an has greatly improved,but no obvious improvement in years of 2000-2011,especially in depth and intensity. The distribution characteristic of poverty changes from the structure layer to sector.(2) The key development area of the city has the most significant effect of suppressing and reducing poverty,while the old industrial area has prominent situation of backing into poverty and the concentration area of floating population has more dramatic changes in poverty.(3) The evolution of urban poverty shows the spatial structure model ofT,taking inner city as the center it is composite made of deformedconcentric circlesandsector. Inner city areas backing into poverty are intertwined with mixing zones out of poverty and backing into poverty. The inner city are surrounded by east and west wings which show circle structure. The state of poverty and the evolution of the spatial structure are results of joint action in urban development,social and economic transformation and urbanization.