三峡库区城镇形态的演变与迁建

高山、江河和地质问题是三峡地区城镇发展中主要的环境制约因素。移民迁建前；库区城镇的结构形态从集中紧凑的“团状”演变为集中紧凑的“带状”，它是最常见的城市形态。迁建后城市建设用地的地形条件普遍有所恶化，但地质问题大多得以改善；长江大桥的建设使库区城市能够突破江河的制约；寻求新的发展空间；“带状”组团式是城镇迁建后最普遍的城市形态。新城市日后的空间形态将受到新的环境的影响，“团状”和松散“组团式”是两种可能的发展方向。

The Form Evolution and Relocation of the Cities in the Three Gorges Reservoir Area

Mountains, rivers & geological problems constitute the main restriction factors during the city relocation in the Three Gorges. Before the relocation, the urban form developed gradually from compact regiment to compact strip, which is the most common form. After the relocation, the landform conditions of the urban construction get worse, but the geologic conditions get better generally. The Yangtzi River Bridges enable the cities to across the River, so the cluster strip becomes the most common form of the new cities. Based the above analysis, the paper points out that the most probable urban form of the new cities would be constellation and regiment affected by the new environment.