Discussion on the impact of karst topography to urban development-A case in Guiyang city

Based on the quantitative analysis of surface slope and topographic relief in Guiyang city through DEM data and GIS method, it is pointed out in the paper that karst landform affects Guiyang city’s urban shape, urban construction land supply, road systems and greenbelt system as well as construction cost. Guiyang city has high mountain with abrupt slope, crushing terrain and developed underground karst as well more potential hazard. All of which have led to scattered space planning of the city, urban land supply shortage and poor in quality, difficulty in road and greenbelt construction. But poor condition of land-use and scattered layout brings high economic costs to urbanization, which brings negative impact on the development and construction of Guiyang city. Therefore, in urban development in the future, we should choose intensive and efficient use of land resources to make compact urban structure and prioritize public transportation to ease the tension of urban construction land use and reduce economic costs in urbanization. Furthermore, it should also pay attention to strengthen landscape management and space control in Guiyang in order to achieve the coordinated development of urban and landscape.