宜昌城市发展周期史研究

任何城市都要经历兴起、发展、繁荣、衰退或再度繁荣的过程。宜昌经历了扑朔迷离、如梦如诗的史前时期,楚源沮漳、巴人地望的古代,口岸开放、战火纷飞的近代,走向光明、蹒跚前行的现代和跨越发展、筑就辉煌的当代,这使得宜昌城市发展具有一定的典型性和周期性。其周期性特点表现为:先民生息地望-军事重镇-郡县治所-过载码头-通商口岸-水电都市-三峡生态经济合作区中心城市。城市发展周期理论的引入为研究宜昌发展提供了一个新的视角。

收缩城市的理论解读

20世纪中叶以来,世界各地出现以人口流失和经济活力下降为特征的“收缩城市”现象。中国进入新常态以来,也出现一些中小型城市悄然收缩的现象。文章使用城市发展的周期理论、邻里生命周期与邻里再生理论、城市发展循环阶段理论解读“收缩城市”现象,科学认知城市发展规律,正确对待“非增长”的城市发展阶段,为应对收缩城市现象提供思路。

Life cycle assessment in the environmental impact evaluation of urbandevelopment--a case study of land readjustment project,Hyogo District, Japan

In this paper, the Life Cycle of Urban Development was firstly analyzed, and the phases of Life Cycle Assessment applied to Urban Development (ULCA) were described. As a case study, ULCA was applied in the environmental impact assessment of the land readjustment project of Hyogo District of Saga, Japan. In addition, mitigation proposals for reducing CO2 were also presented and the relevant environmental ef-fects were simulated.