FENG Jian-min,ZHAO Min-ning,LI Xiao-hua.Spatiotemporal Variation of Urban Land-use Expansion in Xi’an City During the Last 30 Years[J].Research of Soil and Water Conservation,2013,20(04):183-188.
近30年来西安市城市用地扩展时空变化研究
- Title:
- Spatiotemporal Variation of Urban Land-use Expansion in Xi’an City During the Last 30 Years
- 分类号:
- F299.21
- 摘要:
- 目前，中国快速的城市化引起城市用地扩展时空演变加速，由此而引起的大规模土地利用与土地覆盖变化（LUCC）格外引人关注。以1977、1988、1998和2008年MSS/TM影像为基本数据源，在对西安市城市用地信息提取的基础上，应用GIS空间叠加技术，选择扩展强度指数、紧凑度、分形维数、重心转移指数等景观结构和变化指标，系统地分析了西安市城市用地扩展模式与时空分异特征。结果表明：1977—2008年间西安市城市扩展总面积达312.85 km2，年平均扩展速度达9.92 km2，平均扩展强度指数为1.14，呈快速增长态势；城市用地扩展总体格局表现为非紧凑、不稳定性增强、近同心圆扩展与方向分异十分明显的特征，随着城市用地的扩展城市效率有降低的趋势。
- Abstract:
- In these days, rapid urbanization process has accelerated spatiotemporal variation of urban land-use expansion in China, which has been one of the important research fields in the land use/land cover change. Based on the landsat images of Xi’an accepted in 1977, 1988, 1998 and 2008, using RS thematic information extraction and GIS spatial overlay analysis, selected expansion speed, expansion intensity index, compactness, barycenter index, extending orientation and direction index as the main features, a study was conducted on the spatiotemporal variations of the urban land use in Xi’an City. The result shows that the built-up areas in Xi’an City over the last 30 years had increased 312.85 km2, or 9.92 km2 per year and the average expansion intensity is 1.14. Expansion of construction land presented a concentric-style with decreasing compactness, increasing instability and obvious extending direction of space differentiation, and city efficiency decreased gradually.
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备注/Memo
收稿日期:2013-01-02;改回日期:2013-02-02。
基金项目:陕西省教育厅科研基金项目（12JK0137）；咸阳师范学院科研项目（09XSYK201）
作者简介:封建民(1972-),男,陕西凤翔人,博士,副教授,主要研究方向为遥感应用。E-mail:feng_jianmin@yahoo.com.cn