贵阳城市土地利用变化及其环境效应

从城市土地利用的范围 (规模 )、土地利用功能和用地形态等方面阐述了贵阳城市土地利用变化过程、特征、趋势 ,探讨了城市土地利用变化的驱动力因子 ,并对近代贵阳城市土地利用变化所带来的系列环境效应进行了分析评述。

Changes of Ubran Land Use in Guiyang and the Environmental Effects

In views of ubran land use scale, functional structure and spatial pattern of land use this article prelimi-nary analyzed the basic characteristics of urban land use changes in Guiyang City for last seven centuries: (1) ex-panding speed of urban land use scale become more and more faster, but the expanding way was first exterior ex-tension (before 1985), they belongs to interior transition together with exterior extension; (2) functional struc-ture of urban land use from single to mixture and next to separatation methodically;(3) shape structure of urbanland use from concentrated distribution(before liberation) to assembled distribution (iner city and seven satellitetowns). Based on these analysis, the authors explored the main driving forces ( such as policy and institution, theagglomeration of population and economics, karst landform structure, compensating use of urban land, urbantraffic and communication, the progression of science and technology, and suitability of urban land) which af-fected the development of Guiyang ubran land use. Finally, the environmental effects ( especially in moderntimes ) following the development process of ubran land use in Guiyang were summarized as follows: (1)" mod-ern city siknesses "are serious(mainly including urban "island climate", crowding urban residential environmentand unreasonable land use strueture), (2) urban environmental quality tend to deterioration, (3) the frequenciesof urban disasters (such as flood, landslide and mud-rockflow, karst collapse) are quickening.