城市交通干线对盐城城市发展影响的空间分析

本文以江苏省盐城市为例,通过1990、2000、2010年3期盐城市域遥感影像解译,获取盐城市土地利用变化数据,并采用GIS空间分析技术,评估城市交通干线对城市发展的影响。同时,结合Model Builder建模技术,综合运用缓冲区分析、叠加分析、统计分析等方法进行快速、一站式土地利用变化分析。研究结果表明:(1)以道路沿线5km缓冲区及道路出口10km缓冲区研究范围为最佳;(2)盐城市城市交通干线沿线5km范围内随着相应交通基础设施的建设变化非常剧烈,2000年后,高等级公路、高速公路和铁路改建及新建导致沿线土地利用变化发展迅速,特别是204国道沿线和沈海高速沿线变化最为迅速;(3)盐城市城市交通干线沿线重要交通出口10km范围内的变化也极大,新长铁路盐城站出口周边变化最为迅速。

Urban Transportation Infrastructure and Its Effects on Regional Development in Yancheng: A Spatial Analysis Perspective

Transportation and land use is an interactive dynamic process. Urban and regional development is greatly affected by the transportation infrastructure. Transportation-induced development plays an important role on the regional development and urban planning. Quatitative assessment of urban transportation infrastructure and its effects on regional development is essential to promote future urban planning and sustainable development. Yancheng, a coastal city in Jiangsu Province of China, is chosen as the study area. A research framework is developed to evaluate the spatial effects of transportation-induced development in Yancheng over the past 20 years. Firstly, series of land use mapping based on the 1990, 2000, 2010 Landsat TM images classification are acquired through data pre-processing and image classification. Secondly, buffer analysis based on lines and points with the proposed distances are implemented on different transportation infrastructure such as G204 Road, G15 Shenghai Highway and Xinchang Railway. Thirdly, the spatio-temporal change in land use in the proposed buffer zones along the major roads and surrounding their major exits are acquired through the overlay analysis. Fourth and Finally, the statistical analysis are performed to obtain the major urban transportaion infrastructure and its effects on the surrouding land use. In the technical work, a geoprocessing model is developed to evaluate the major road impacts on the urban and regional development based on Model Builder moduler. Such a geoprocessing model can effecitively used to select the optimal buffer distance around a line or a point. The follow-up calculation and analysis are based on the proposed buffer anlysis. In this study, the best buffer distance along the major roads is 5km in both sides, and the best buffer distance surrounding the exits of major roads is 10km. The results show that such a spatial analysis perspective is a novel way to evaluate the transportation-induced urban and regional development. The land use type from cropland to construction land along the major roads is changed rapidly, especially since 2000. The cumulative land use change is very significant along the major roads, particularly along the new-built G15 Shenghai Highway.