Study On Ecological Security In Regional Urbanization

Urbanization and urban ecology build is the important tactic in the development of the current society and economy. The level of urbanization often reflects the level of economic development in one country or region. The ecological problems bringing by the urbanization also reflect the living quality of one country or region. Rural industrialization and urbanization is the essential choice in town modernization. But the increasing ecological problems have been the block in the process of urbanization.This thesis concludes five sections as follows:The first part is a brief introduction. It narrates this article's research background and significance. Meanwhile, it summarizes researching trend in internal and external countries.The second part gives the theory basis of this article. Ecological security for urbanization and rural development depend is balance, and agro-ecosystem is health. It narrates the conception and characteristic of the ecological security in aspect of nation and region, brought forward constructing ecological security system, and the synopsis discussed the current and national condition of ecological security and evaluation result.The third part is the key part of the article. On one hand, this part makes research on the urbanization foundation theories. On the other hand elaborating and analyzing theecological effect bringing by the process of urbanization. This article divided the ecological effects into two kind: the multiplicational effect and menace effect, and analyses the mechanism of the two effects bringing by the urbanization. It also discusses the menace effect in urbanization in detail from aspect of atmosphere, soil and water etc.The fourth part of this thesis is the demonstration part. As a case study of Gaoyou, Ecologic fuzzily composite evaluation matrix introduce surface water, atmosphere, groundwater and ecological conditions as evaluation elements, moreover, considering Gaoyou's reality, determines each element's evaluation factors, and by believing that the factor has greater pollutant contribution has greater weight, ascertains each weight, concluding that Gaoyou's ecological security belongs to the third grade.The fifth part gives the policy arranges aiming at the ecological security problems bringing by the process of the urbanization. Combining the national stratagem in ecological security, it advances the ecological security road in the urbanization. It also apples the GIS technology to build the control system of Ecological security.This study still remains in the stage of theory construction and macroscopic research because of large amount of research work, complex impact factors, and limited time. There exist many areas that deserves further study, especially the index, algorithm, and threshold of ecological security evaluation.