当代美国城市化演变、趋势及其新特点

二战后美国城市化向郊区化或逆城市化阶段转变,人口、工厂、商店及各种机构从大城市中心迁移出去,在外围的郊区及小城镇重新定址.在城市化演变过程中,由城市中心及郊区次级中心组成新型的大城市地区逐渐多中心化乃至无中心化,整个大城市地区支离破碎.与此同时,城市系统趋于集群化,幅员辽阔的大城市地区经济经过分化与整合,城市化向非城市地区扩散与渗透,出现了新的城市化影响地区,对城乡地区构成了深远的影响.

The change, trend and latest characteristics of Contemporary Urbanization in of US

Urburnization entered the stage of suburbanization or disurbanization in America after the World War Two. The population, factories, stores and all kinds of organizations moved to go out from the city center, and settled in suburbs and towns outside the city. In the process of the change,metropolitan area constituted by urban center and suburbs has gradually become polycenteric,and even had any centers.The whole metropolis has become fragmented. At the same time,the urban system has become aggregative points. After broad metropolitan area has been divided and integrated, urburnization has been scattering and permeating through countryside.