| Natural ecosystems are gradually replaced by artificial environment caused byrapid urbanization. Therefore, to achieve regional ecological security requires toensure ecological environment not be threatened, and the ecological resources canprovide ecological protection for the advantage of regional resources and sustainabledevelopment in the process of urbanization. Urban agglomeration as the main form ofChina’s urbanization development, the quality of its ecological environment directlyaffects the ecological environment security of the national and regional district.Ecological footprint model was proposed by the scholars William and Wackernagel in1990s, this model is a research methodology used to evaluate the sustainabledevelopment degree based on the bio-physical quantities. This model takes therenewable&alternative capacity of natural resources, the circulation&purificationcapacity of accountlife-support systems and biodiversity conservation into account,and its calculation result is direct and intuitiveregional comparable. Thus, this modelis a significant standard and implementation to measure the regional ecologicalsecurity. This thesis takes the core area of Changsha-Zhuzhou-Xiangtan UrbanAgglomeration as the research area, to dynamic measure the regional ecologicalfootprint, energy ecological footprint and ecological footprint pressure index in thisregion from2000to2009years, and further explore the impacts of urbanagglomeration morphology and socio-economic indicators on the ecological footprintand energy ecological footprint of this region, and on this basis, apply the ecologicalfootprint concept to the urban agglomeration ecological planning process to achievethe sustainable development for China’s urban agglomerations, and provide researchavenues and planning strategies for the realization of regional ecological balance.First, through the temporal and saptial analysis of GIS and RS technology, thisthesis inverstigates the characteristics of land use, land-use structure and spatialanalysis, the coordination of the number and structural diversity, as well as theland-use efficiency in order to analyze the land-use characteristics of Changsha-Zhuzhou-Xiangtan Urban Agglomeration.Second, to calculate the ecological footprint, energy ecological footprint andecological pressure index dynamic change by the ecological footprint model in thereseach area from2000to2009, so as to explore the ecological security of Changsha-Zhuzhou-Xiangtan Urban Agglomeration. Next, select the related indicators of the level of socio-economic and urbanagglomeration morphology and then analyze their impacts on ecological footprint,energy ecological footprint and ecological footprint pressure index and obtain themain factors affecting the ecological security of Changsha-Zhuzhou-Xiangtan UrbanAgglomeration, indicating the relationship between urban agglomeration morphology,socio-economic indicators and ecological footprint. Discuss the possible impactfactors to make a reasonable analysis of the driving mechanism of ecological securityin the core area of Changsha-Zhuzhou-Xiangtan Urban Agglomeration.Finally, apply the concept of the ecological footprint to the regional ecologicalplanning, propose to apply the ecological footprint method in the planning process ofthe improvement of ecological security level in order to achieve the optimization anddevelopment of the sustainability assessment of regional ecological security of urbanagglomerations.The following is the basic conclusion of this thesis:(1)The regional land use structure succession between construction land andagricultural land of Changsha-Zhuzhou-Xiangtan Urban Agglomeration core area israpid. Urban land expansion coefficient in the three major cities of Changsha-Zhuzhou-Xiangtan Urban Agglomeration in2004-2006within the critical value of1.12, the three urban land is basically compact development. The overall level of landuse efficiency is low, the development of land intensive use in the area is imbalanceand the land use economic efficiency is not high are main prominent factors result inlow-efficiency land use of Changsha-Zhuzhou-Xiangtan Urban Agglomeration.(2)The land comprehensive carrying capacity of Changsha-Zhuzhou-XiangtanUrban Agglomeration core area shows obvious spatial difference, regional landcarrying capacity rates for0.6661, while Xiangtan City rates to0.7499, Zhuzhou Cityis the lowest to0.5819, difference between the two cities is0.1681. In the foursubsystems of land comprehensive carrying capacity model--economic system, socialsystems, soil and water resources, ecological and environmental efficiency ofChangsha-Zhuzhou-Xiangtan Urban Agglomeration, the volatility of ecologicalenvironment and economic system is large, therefore the land and water resourcesprotection and the effectiveness of the ecological environment construction has adecisive impact on the comprehensive carrying capacity dynamic changes ofChangsha-Zhuzhou-Xiangtan Urban Agglomeration. While the differences of externaleconomic of urban land use and social construction efficiency among the three majorcities are large.(3)The per capita ecological footprint and energy ecological footprint of Changsha-Zhuzhou-Xiangtan Urban Agglomeration core area from2000to2009shows a growth trend. The per capita ecological footprint is1.4426hm2/person in2000, and reached1.7773hm2/person in2009, it grows rapidly about1.23times morethan in2000. The ecological footprint and energy ecological footprint decline from2006, it means that human life for the ecological resources is in a slowdown trend ingrowth. However, the ecological pressure index growth rate from2000to2009inChangsha-Zhuzhou-Xiangtan Urban Agglomeration core area is4.7%, a large growthrate, indicating its ecological security situation continues to decline.(4)The results show that ecological footprint is significantly and positivelycorrelated with population density and socio-economic index, in which the correlationbetween population density and energy ecological footprint has reached0.873,withthe significance of0.002; meanwhile, population density and elongation ratio is alsosignificantly correlated, with the correlation of0.675,though form ratio andcompactness ratio have insignificant correlation with ecological footprint, they arenegatively correlated; there is a significant and positive correlation showed betweenelongation ratio and ecological footprint, which is most correlated in the selectedmeasure indexes, with the correlation of0.841; however, there are no significantcorrelations between compactness ratio and form ratio with population density andvarious socio-economic indexes. This indicates that urban agglomeration spatialmorphology is not compact enough, or just simply increasing the urban andpopulation density will lead to the increasing of ecological occupancy, only with themoderate compact developmental pattern of urban agglomeration morphology canregional sustainable development be realized.(5)Ecological footprint method and model is an intuitive and comprehensiveindicator of measurement and comparison of regional sustainable development status.Through applying ecological footprint analysis to ecological planning progress ofurban agglomeration, this thesis propose to take ecological footprint intoconsideration from the analysis of urban agglomeration ecological status, theecological footprint of urban agglomeration of each type of land use control and setthe ecological security of urban agglomeration targeting urban agglomerationecological planning process, and propose improvement of the ecological environmentand sustainable development policies and strategies of Changsha-Zhuzhou-XiangtanUrban Agglomeration... |
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