The Ecological Space Evolution And Regulation Of Changsha-Zhuzhou-Xiangtan Urban Agglomeration

With the rapid development of urbanization, urban agglomerations become a new urban area unit. The development of urban agglomerations must be accompanied with changes in urban agglomerations ecological space. In turn, the manages and controls of ecological space in urban agglomerations also affect the development of urban agglomerations. Changsha-Zhuzhou-Xiangtan urban agglomerations is the resource-conserving and environmental-friendly society comprehensive reform experimental zone, researching the evolution characteristics, evolution process and control measures of ecological space have important theoretical and practical significance to the consist and healthy development of urban agglomerations.In this paper, we take Changsha-Zhuzhou-Xiangtan urban agglomerations core as research area. GIS, RS and statistical methods are used to research its ecological space evolution characteristics; based on cellular automata, we build a logistic regression model to simulate the evolution process and analysis the driving mechanisms of ecological space, so that predict the evolution trends of ecological space; according to the above analysis, we research the existed problem and propose regulatory measures which adjust to construction and development of the resource-conserving and environmental-friendly society. Research results: (1) The scale of the ecological space dropped.2000-2010, the ecological space of research area decreased253.85km2, which rose from92.81%in2000, fell to89.87%in2010; in addition,94%of the non-ecological space area is from farmland and woodland.(2) The spatial and temporal differences of the evolution is significant.Spatial differences:2000-2010Changsha County has the largest ecological space conversion.2000-2005, the relative conversion rate of Changsha City is1.18, only ranked behind of Changsha County; but in2005-2010, Zhuzhou city was the one that ranked behind of Changsha County, the relative conversion was1.38; its convert rate was more than the Changsha city.Temporal difference:2000-2010, the average annual change rate of ecological space in the research area was faster and phased obviously. The average annual change rate of ecological space in the research area for2000-2010was0.47%; the average annual change rate in the ecological space (0.85%) in2000-2005is much larger than its (0.13%) in2005-2010. After the two-oriented social construction, the ecological space was protected effectively.Evolution direction difference:the ecological space degradation strength of the three largest cities adjacent suburban area is the largest, the magnitude of change in Changsha city is the largest, reduced109.63 kmz from2000to2010, Changsha County is second, reduced54.42(3) The influence degree of each factor to the evolution of ecological space was variable. Neighborhood and urban share the greatest impact on the evolution of ecological space, for the road traffic, the greatest impact factor is national road, expressway has the minimal impact.(4) The scale of ecological space will be further reducing in2015. the accuracy of ecological space experiments in2010is90%,61.2km2ecological space will disappear from2010to2015.(5)Some effective measures must be proposed to control the scale of ecological space. Emphasis on ecological space conservation and construction, building ecological civilization environment; adjust the industrial structure, achieve industrial upgrading, integration of social resources, strengthen the synergy; and improve the mechanism of ecological construction of legal system, delimit the ecological control line and other reasonable Suggestions.