Karst urban land use/cover change research - in Guiyang city as an example

摘要

The urban land use and cover change (LUCC) through the biogeochemical cycle process affecting the city ecological environment, urban district LUCC is the key areas of LUCC research. Guiyang city is the typical karst plateau city of China and even the world, Karst natural background has vulnerability. So under the GIS support ,this article analysis land use/cover change dynamic of the Guiyang city from1990 to 2010, the results show that: (1) Guiyang city construction land area increased by 3.56 times in a short span of 20 years from 57km~2 in 1990 to 204 km~2 in 2010, urban area times; (2) A large number of woodlands occupied by city urban construction, nearly 20 years takes up the forest land area of 75.8 km~2, accounting for 51.56% of the nearly 20 years of new urban construction area;