沈阳市城镇扩展时空格局及其驱动力

利用多时相TM影像,采用GIS空间分析和景观格局分析相结合的方法,对沈阳市辖区城镇扩展的时空分异特征和城镇景观格局演变进行了分析,并对其驱动力进行了探讨.结果表明:1988—2004年间,沈阳市辖区城镇面积持续增加,扩展强度逐渐增强,2000—2004年间的城镇扩展规模和强度达到最大;城镇扩展具有明显的空间分异特征,市区西南方向是城镇扩展的主方向,近郊及各级经济开发区是扩展的主要区域;城镇景观格局日趋复杂,城镇发展紧凑程度降低;城镇景观格局演变与城镇扩展特征关系密切,表现出时空分异特征;工业化发展与开发区建设、政府政策与城市规划以及交通基础设施建设是沈阳市辖区城镇扩展与城镇景观格局演变的主要驱动力.

Spatiotemporal pattern and its driving forces of urban growth in Shenyang City

By using time series Landsat TM satellite images and adopting GIS spatial analysis and landscape pattern analysis methods,this paper studied the spatiotemporal diversity of urban growth and the evolution of urban landscape pattern in Shenyang,and examined their driving forces.The results showed that in 1988-2004,the urban area in Shenyang increased persistently,and the growth intensity enhanced consistently,with the peaks occured in 2000-2004.The spatial differentiation of urban growth in the City was also distinct,with the southwest direction as the leading orientation,and the urban edges and different level economic development zones as the main growth areas.The urban landscape pattern became more and more complex,and the compactness index of urban development decreased.The evolution of urban landscape pattern was related to the characteristics of urban growth,which also showed spatiotemporal diversity.The urban growth and urban landscape pattern evolution in Shenyang were mainly attributed to the development of industrialization and the construction of different level economic development zones,the proper policies of local governments and the urban planning,as well as the development of traffic infrastructure.