2000~2010年长江三角洲土地利用/覆盖空间格局动态变化研究

土地利用/覆盖变化与空间格局间的相互作用机制是全球环境变化的研究热点。以2000年、2005年及2010年遥感影像为基础数据源，通过面向对象的分类方法，对长江三角洲的土地覆盖进行分类。利用分类结果，通过数学模型和景观指数探讨了土地利用变化对长江三角洲景观格局的影响。结果表明：1)2000~2010年长江三角洲土地利用变化明显，人工表面“涨势”明显，耕地与湿地则呈现下降趋势；2)10年间长江三角洲土地利用多样化指数增加，土地利用多样性程度逐年提高；3)2000~2010年长江三角洲景观破碎化程度增加，优势度减小，景观形状复杂性与异质性不断加大。这些研究可以为土地利用结构的调整、生态环境的恢复重建提供依据，促进长江三角洲的可持续发展。

DYNAMIC CHANGES OF LANDSCAPE PATTERN IN THE YANGTZE RIVER DELTA FROM 2000 TO 2010

The interaction between land-use change and landscape pattern has become a hot research topic in the field of global environment change. In this study, using remote sensing images with the resolution of 30m (HJ-CCD and Landsat TM), the land cover types of 2000,2005 and 2010 in Yangtze River delta were mapped by the object-oriented classification method. Based on the classification results, landscape indices were calculated by mathematical models. And then the influence of land-use change in Yangtze River delta on landscape pattern were analyzed and discussed. The results showed that: (1)Great change in land cover had taken place from 2000 to 2010 with sharp decrease of cultivated land area and dramatic increase of artificial surface area (2)The diversity index of the land use was increasing from 0.5747 in 2000 to 0.5972 in 2005, and 0.6254 in 2010 during ten years, which indicated that land-use was become diversification (3)The fragment of the landscape, the heterogeneity and the complexity of the landscape were all experienced an increase during ten years while the dominance decreased. These studies could provide a basis for adjustment of land use structure, restoration of ecological environment and sustainable development in the Yangtze River delta.