The Research On Oasis City Green Space Devolution And Driving Force

With the accelerated development of process city, city population migration, industrial cluster and other social and economic benefits have been promoting, but also caused the change of land use/land cover types, natural resources and ecological environment condition. Green space is a part of important ecological functions of urban ecological system, the regulation of climate, city water conservation, air purification, maintenance of biological diversity and other functions, and play an important role in the coordination of urban space development, regulating ecological balance, improve the quality of the environment, is an important way to balance the urban sustainable development and ecological environment of contradictions. Considering the Ganzhou District special have geographic location and natural environment, research on the evolution of the relationship and rule of urban development and green space, to explore the driving force for the evolution of green space landscape pattern, which has important significance for the construction of ecological civilization city with the Silk Road economy.In this paper, environmental science, and other disciplines based on landscape ecology, using remote sensing and GIS techniques, the Ganzhou District in 1995, 2000,2006,2011 four periods of remote sensing image interpretation, access to green space in Ganzhou area data. The number of structural changes in the use of mathematical statistics, the transfer matrix method to reveal the evolution of green space in Ganzhou district and changes; using the landscape index of Ganzhou District green space landscape pattern integrity and gradient analysis, were analyzed the landscape pattern index of different gradient from the landscape scale, types of scales, this in-depth study of pattern and the evolution trend of green space landscape in Ganzhou district; from two aspects of natural factors, human factors, using the research methods of semi qualitative, semi quantitative of Ganzhou District green space change driving factors were analyzed and summarized, the safety evaluation for landscape and ecological city planning and provide a theoretical basis.Overall,1995-2011 year Ganzhou District green space land in both quantity and quality change, the land transfer in the form of more complex, green space for expansion, quality structure has been optimized; green space inside each type of landscape reflects the different evolution tendency. Green space in Ganzhou area showed an upward trend year by year, the green space is showing an overall cultivated land> grassland> forest> waters of the land use types, and the overall trend remains unchanged, but the area proportion of various landscape types over time, showing different degrees of increase or decrease the number of various types of plaque; reduce, landscape heterogeneity decreased, there is the tendency to reduce the degree of landscape fragmentation, dominant patch type connectivity is getting better and better, the average patch shape becomes complicated after the first tends to be simple; in the whole time interval, SE-SSE, W-NW direction is the leading direction to expand green space, green space land in each range extended increasingly tend to balance, the most significant green space distance built recent changes in regional area. Factors of social development of population, economy is the dominant factors of the evolution of the green space landscape pattern planning, policy factors are the fundamental factors of the evolution of the green space landscape pattern.