山区城镇建设中的地貌问题

THE GEOMORPHIC PROBLEMS IN THE URBAN CONSTRUCTIONS OF THE MOUNTAIN AREAS

论述了河流阶地、冲洪积扇、台地、剥蚀面、滑坡平台等地貌类型的分布特征、演化规律及作为城镇选址的利弊,并提出兴利除弊、合理利用的途径.以四川省为例,对山区城镇地貌灾害的演化规律及防治措施进行了探讨.从地貌的角度对山区城镇发展的限制性因素进行了分析.

The undulating ground surfaces of the mountain area are unfavourable to the urban constructions. The cities and' towns in the mountain area arc mostly situated at these geomorphic types such as the river terraces, alluvial plains, platforms, denudation surfaces, etc. Nevertheless, the urban scale, plane forms, internal texture, etc. are greatly affected by the scales and forms of these geomorphic types. In the mountain area with various geomorphic processes, the geomorphic disasters occur frequently. The cities and towns in the mountain area suffered from the natural disasters, as well as from the geomorphic disasters caused by human activities. Therefore, it is necessary to full understand the geomorphic evolutive laws and to guide the construction according to the local conditions. In the construction of the mountain area, urban scale should not be too large, and the small town is ideal one for the mountain area.