关键词: TM影像, 土地利用, 景观格局指数, 番禺区

Abstract:

Based on 1990, 1995, 2000, 2005 Landsat-TM images in Panyu District of Guangzhou City as the main data source, GIS tools and Landscape Ecology methods were used to generate land cover landscape maps. On the basis of the quantitative study of LUCC, land cover change mechanism during the study period in Panyu District was reflected by landscape pattern indices, providing research basis for the effects of land cover on landscape pattern and its ecological effects. The result showed that the land use structure of Panyu District represented a period of development and adjustment from 1990 to 1995, and tends to become mature situation after 2000. The structure of land cover changed showed maturity along with the process of urbanization. The landscape fragmentation and the complexity of land use structure increased. The effects of human-induced land cover change gradually replaced the natural role in affecting land cover type.From the quantity of land use change from 1990 to 2005, land use change accompanied by urbanization and farmland quantitative changes are the largest in Panyu District. And as followed by construction land and garden, water changes are also significant. Farm land and garden are reduced while the other land type increased. Human factors induced land-cover changes played a growing role while the effect of natural factor was decreasing. The structure of agriculture and people's lifestyles are changing rapidly. The rates of land-use change rank as follows: green fields > transportation land> shrub grassland> building >garden> arable land = water. As shown in landscape changes, arable land, garden, forest land and building land have increasing patch fragmentation especially agricultural land, garden, lawn irrigation, etc. And the expansion of construction land area led to increasing degree of concentration. In addition to garden, the other land type also increases the complexity of the class.

Key words: TM image, LUCC, landscape pattern indices, Panyu District