Quantitative analysis and fractal modeling on the landscape mosaic and its evolutionary process of Shanghai in the period from 1947-1996
Xu Jianhua, Mei Anxin, Wu Jianping, Xiong Yunbo
The Key Laboratory of Urban & Environment Geocomputation, Ministry of education P. R. C., Geography Department of East China Normal University, Shanghai 200062
On the research background of the central area of Shanghai city, the mosaic structure of landscape was studied by using quantitative methods of landscape ecology based RS & GIS in this paper. Firstly, by using remote sensing image, we classified the landscapes into eight kinds, which were respectively residential area, industrial area, road, other urban landscape, farmland, village & small town, building area, river & other water area. Secondly, we designed and set up a geographical information system(GIS) based on the digital data of remote sensing image, field investigation data and other data, and figured out the digital map of landscape mosaic. Thirdly, depending on the spatial analysis function of GIS, we calculated the index of diversity, dominance, fragment, isolation and fractal dimension of each landscape in different periods. Fourthly, basing on the spatial analysis function of GIS, we analyzed main factors that affect the landscape mosaic and its evolutionary process. The main conclusions of the paper were as the following:(1) The expanding model of urban landscape of Shanghai is different from other Chinese cities, which expand from center to periphery evenly, The expanding of urban landscape of Shanghai is uneven not only in space but also in time;(2) The diversity and fragment of landscape mosaic are enlarging while the dominance is reducing with time;(3) Isolations of residential area, industrial area, and other urban landscape are reducing while which of farmland, village & small town are enlarging with time. The isolations of road and river & other water area are not changing with time;(4) Fractal dimensions of landscape types from high to low are respectively road, river & other water area, farmland, residential area, village & small town, industrial area, building area, other urban landscape, The rank shows the complexity of landscape types;(5)From the point of the evolvement process of patch forms, the patch forms of residential area become more and more complex gradually, while the fractal dimension of which increase slowly. Some patch forms including industrial area, road, and other urban landscape, farmland and village & small town, which undergo from simple to complicate, then from complicate to simple, the fractal dimensions of which keep the increasing trend from 1947 to 1988, the fractal dimensions reach climax in 1988, then reduce gradually;(6) The main factors affecting landscape mosaic and its evolutionary are respectively river corridors, original base of city, traffic corridors, city development, and city plan.
徐建华, 梅安新, 吴健平, 熊云波. 20世纪下半叶上海城市景观镶嵌结构演变的数量特征与分形结构模型研究[J]. , 2002, 21(2): 131-137.
Xu Jianhua, Mei Anxin, Wu Jianping, Xiong Yunbo. Quantitative analysis and fractal modeling on the landscape mosaic and its evolutionary process of Shanghai in the period from 1947-1996. , 2002, 21(2): 131-137.
[12] Bai-Lian Li. 2000. Fractal geometry applications in description and analysis of patch patterns and patch dynamics[J]. Ecological Modelling, 132:33-50.
[13] Forman, R. T. T., Godron, M. 1986. Landscape Ecology[M]. New York:Wiley & Sons. 125-256.
[14] Forman, R. 1995. Land mosaics, the ecology of landscapes and regions[M]. Cambridge:Cambridge University Press. 30-126.
[15] Hulshoff, R. M. 1995. Landscape indices describing a Dutch landscape[J]. Landscape Ecology, 10(2):101-111.
[16] Mandelbrot B B. 1982. The fractal geometry of nature[M]. New York:W H Freeman. 244-320.
[17] Turner, M., R. H. Gardner(eds.) 1991. Quantitative methods in landscape ecology[M]. New York:Springer-Verlag, 264-358.
[18] Xu Jianhua, et al. 2001. A Study on Landscape Mosaic Structure in Urban-Rural Area in Northwest of China with RS and GIS[J]. Chinese Geographical Science. 11(4):367-377.