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区域重心模型能够直观地衡量经济属性的动态演变过程以及区域差异,反映城市空间结构的变化。研究采用1989—2009年天津市人口与工业总产值数据,引入重心测度模型,以人口重心为参照,对天津市工业重心在时空上的动态演变轨迹进行实证研究;结合各区县工业差异变动规律,对重心迁移的影响因素进行探析。结果表明:与人口重心在北辰区内缓慢移动不同,21年来天津市工业重心向东南方向迁移,由市中心移动到市区外围,且在东西方向的不均衡性显著大于南北方向。区位条件、政府政策、产业结构调整等因素会对工业布局产生影响,引起工业重心迁移。
Regional center of gravity model can visually measure the dynamic evolution of economic attributes and regional differences, reflecting the changes in urban spatial structure. Based on the population gravity and industrial output data of Tianjin City from 1989 to 2009, this paper introduces a model of gravity measurement, takes the center of gravity as a reference and conducts an empirical study on the dynamic evolution trajectory of Tianjin industrial center of gravity in time and space. Combining the changes of industrial disparity in different districts and counties, The influential factors of the center of gravity migration are analyzed. The results show that: with the center of gravity moving slowly in the Beichen District, the industrial center of gravity of Tianjin migrated to the southeast in the past 21 years and moved from the downtown to the periphery of the urban area. The imbalance in the east-west direction was significantly greater than that in the north-south direction. Location conditions, government policies, industrial restructuring and other factors will affect the industrial layout, causing industrial center of gravity migration.