重庆市2号线轻轨沿线景观格局空间分异研究

在RS和GIS的支持下,运用景观生态学原理,利用重庆市1986年、2000年Landsat TM遥感影像资料和2007年中心城区用地现状图作为信息源,选取破碎化指数、多样性指数等4项景观指数,对重庆市城市轨道交通2号线沿线2km范围内景观格局变化进行定量分析.同时运用缓冲区分析方法,沿2000年和2007年轨道交通以0～0.5 km,0.5～1 km,1～1.5 km,1.5～2 km建立双侧缓冲区,提取住宅用地、城市水域、商服用地、工业用地、公园绿地5种重要景观要素信息,通过计算各缓冲区内各项要素的景观指数,分析重庆轨道交通2号线沿线景观类型的空间分异状况.结果表明,轻轨2号线建设对住宅用地和工业用地表现出较强的吸引效应,景观破碎化指数趋于减小,空间集聚不断加强;商服用地破碎化指数、景观形状指数和分维数随着缓冲区距离增大呈现降低趋势;公园绿地分维数和形状指数较低且变化不明显;城市水域景观形状较简单,稳定性强.

Research on Spatial Differentiation of Landscape Patterns along Chongqing UMT Line 2

Supported by remote sensing (RS) and geographical information system (GIS) and based on the theory of landscape ecology, the landscape pattern along Chongqing UMT Line 2 was analyzed using the TM images in 1986 and 2000 and the land--use map of the urban area of Chongqing City in 2007. Mean plaque area, landscape fragmentation index, and index and fractal dimension were chosen to present a quantitative analysis of the spatial heterogeneity of Chongqing UMT Line 2. By buffer spatial analysis of 0 -0.5 km, 0.5-1 km, 1-1.5 km and 1.5-2 km of Chongqing UMT Line 2 in 2000 and 2007, residential land, city water body, land for commercial use, industrial land and green space were extracted as five im-portant elements of the landscape. By calculating landscape indices of these five elements, the spatial dif-ferentiation of the landscape pattern of Chongqing UMT line 2 was displayed. The results showed that during the period from 1986 to 2007, Chongqing UMT Lifie 2 exerted a strong effect of attraction on resi-dential land and industrial land. Landscape fragmentation index tended to decrease. Space concentration was steadily strengthened. Landscape fragmentation index, landscape shape index and fractal dimension of land for commercial use showed a decreasing trend with increasing distance of the buffering area from Chongqing UMT Line 2. Landscape shape index and fractal dimension of green space were relatively low and did not change significantly. The shape of city water body was simple and its stability was good.