影响中国城市分布和建设的地貌因素

根据地貌格局与城市的关系,全国可以划分为西南部高山高原、西北部内陆高原盆地和东部平原丘陵3个大区.据分析,我国城市多分布于河流交汇处、河流阶地平原、两大地貌单元交界处及沿海与岛屿.现代地貌过程对城市建设影响较大,常常给城市带来灾害,如洪水、地面下沉、滑坡、泥石流等,因此,要掌握其演化规律,予以防治.

THE GEOMORPHOLOGICAL FACTORS OF INFLUENCE ON URBAN DISTRiBUTION AND CONSTRUCTION IN CHINA

China has vast territory and various geomofphic types. Based.on the relationship between the geornorphic ' structure and urbanization, China may be divided into three regions, i. e. High plateau and mountains in the southwestern China; Plateau and basins in the northwestern China; and Great plain and hilly land in the eastern China. The cities of China are varied, and the urban geomorphic sites are different. The cities of China are mostly distributed at the confluences of the rivers, river-terrace plains, the boundary between two big geomorphic units and seasides and islands. The present geomorphic processes have had great effects on the urban construction and caused the disasters, such as flood, subsidence, landslide, debris flow. etc. Therefore, it is important to understand the evolutive laws of geomorphic processes in order to prevent and control the disasters.