Dynamic Changes Of Landscape Pattern In The Yangtze River Delta From2000to2010

Land use and land cover change is considered to be one of the major determinants ofglobal change, have a major impact on global biogeochemical cycles and climate change. Inrecent years, land degradation, soil erosion, water scarcity, loss of biodiversity, globalwarming, and a series of environmental problems so that more and more people realize theimportance of the environmental impact of human activities on the planet, and also graduallylearned that the land use/cover change is one of the main global change. Landscape patternon ecological processes plays an important role. Quantitative indicators of landscape changesin landscape pattern analysis theory, methods and application of research has always been thecore of landscape ecology. To study the spatial pattern of land use change by using the indexmethod of ecology, we can understand the landscape pattern of land use characteristics, andexplore the relationship between land use change and ecosystem function.In this paper, our most economically developed Yangtze River Delta as the study area,using the land-use basic theory and basic principles of landscape ecology, remote sensing andGIS, based on the study area in2000,2005and2010Landsat TM/HJ-CCD Pretreatment anduse of remote sensing images object-oriented approach to classify and use GIS changedetection was carried out to understand the changes in the Yangtze River Delta and the wholedistribution. On this basis, the use of land use/land cover transition matrix, diversity indexand centralized index further study quantity structure of land use/cover of the Yangtze RiverDelta; the Yangtze River Delta landscape pattern and the driving force of coverage using avariety of landscape ecology and socio-economic data. Studies shows that:(1) the Yangtze River Delta2000-2010dramatic structural changes in the number of landuse, conversion between classes around the obvious. The main manifestations of rapidurbanization, urban expansion speed, into the artificial surface is mostly from farmland;significant reduction of arable land within a decade, most arable land into artificial surface(urban expansion and construction traffic road), followed by wetlands and woodlands. Agricultural restructuring which, the rapid conversion of farmland to forestry and fisheries toreduce the arable land is also another important reason; wetland area reduction, perhaps themajority of arable land and artificial surfaces.(2) diversity index and the index of concentration were used to study the land usestructure in2000-2010of Yangtze River Delta, the results indicate that the overalldiversification index of the Yangtze River Delta showed an increasing trend, indicating theuse of various possibilities of land in Yangtze River Delta has gradually improved;10years16City in the Yangtze River Delta diversification index continued to increase in addition toHangzhou and Zhoushan City declined slightly. Nanjing is the fastest growing, followed byZhenjiang City, Shanghai. Yangtze River Delta decade centralized index of land use isdeclining, indicating that the whole Yangtze River Delta land use type dispersion increasingdegree of centralization continued to decline.(3) the Yangtze River Delta region of the profound impact of land use change landscapepattern, the Yangtze River Delta urbanization has led to the development of residential landand farmland artificial surface, forming the shape of a variety of cultivated land and artificialsurfaces, so that the fragmentation degree of study area increased and dominance decreases,landscape shape complexity and heterogeneity increasing. The main driving factors can begrouped into three areas of population factors, economic factors and policy factors.