西宁市主城区城市土地利用格局变化分析

AN ANALYSIS OF LAND USE PATTERN CHANGE OF XINING CITY BASEE ON GIS

西宁市是西部大开发战略实施以来在西部地区城市化水平提高较快的城市之一。西宁市主城区城市土地利用变化的格局显示出西宁市城市发展的基本阶段。文章利用1996—2008年西宁市主城区城市土地利用数据,对西宁市土地利用格局变化进行了分析,结果表明:西宁市主城区城市土地利用格局在1996—2003年发生较大转变,土地利用格局由耕地主导型转变为多元化城市土地利用格局,说明西部大开发、青藏铁路等国家重大战略措施对西宁城市发展具有十分重要的影响,西宁市高原区域现代化中心城市的土地利用格局在2003年前后才基本形成,表现出青藏高原落后地区中等城市城市化过程的滞后性;2004—2008年各类土地利用变化相对平稳,但耕地、林草地、未利用土地的面积减少和空间变化揭示出西宁市等典型河谷型城市的地形和河流对城市建设和发展控制性作用明显,城市土地利用紧张。

As a typical city lied on valley, land use of Xining city is influenced and restrained. By the terrain of the basin. Based on GIS method, 1996, 2003, 2004, 2008 iv land detailed survey data were used to the analysis of land use pattern recent change in Xining city. The land use pattern had a significant change during 1996 - 2003, basic land use pattern had already formed in 2003. From 2004, land use change was relatively steady. The change was mainly in land use structure change, which property is from cropland-leading to multiply land use pattern, induced by the urbanization process and infrastructure construction. This reflects urban land use diversity trend in the development process of a moderate economic city in underdeveloped Western region.