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

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Abstract

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.

Key words： Urban Landscape Mosaic Structure RS and GIS Shanghai

Received: 25 April 2002

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	Xu Jianhua
	Mei Anxin
	Wu Jianping
	Xiong Yunbo

Cite this article:

Xu Jianhua,Mei Anxin,Wu Jianping, et al. Quantitative analysis and fractal modeling on the landscape mosaic and its evolutionary process of Shanghai in the period from 1947-1996[J]. , 2002, 21(2): 131-137.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2002/V21/I2/131

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