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Urbanization is a complex process of social change, and its development related to all aspects of economic and social life, to a large extent subject to the effect of the development in which economic, social and natural environment. Since the reform and opening up, especially in the implementation of the strategy of developing the western region, the western region development of urbanization has made remarkable achievements, played an effective role in promoting economic and social development in the region, but in the process of development, there are a series of problems, such as fuzzy understanding of urbanization, the low level of urbanization planning, lack of industry support of urbanization, urbanization development strategy deviate from the serious waste of land, urbanization, urbanization, population absorptive capacity is weak, these problems become obstacles to further promote urbanization . Study western region regional situation analysis of the existing problems, come to the urbanization of the western region reason, the western region's economic strength has long been weak, urban and rural spatial pattern of economic policies and institutions, there are many obstacles, the low quality of the population, fragile ecological environment, water shortages. Due to the presence of these issues and their constraints, the risk of the development of urbanization of the western region have become increasingly apparent, pose a threat to the sustainable development of urbanization. Scientific evaluation of the risk of developing the western region of urbanization, and to propose appropriate prevention and control measures is an urgent requirement to promote the healthy and orderly development of the urbanization of the western region. This paper, based on the analysis of the urbanization of the western region development status, problems and constraints, combined with its special regional situation, drawing on Urbanization and risk theory and its domestic and foreign research status, in-depth analysis of the development process of the urbanization of the West the presence of four major categories of risk the the ecological environmental risk, political risk, economic risk and social risk; followed by the combination of comprehensive, operational, goal congruence, the minimum and the level of principle, to design a set of including the target layer criteria and index, the four subsystems involved in economic, social, political, environmental, a total of 16 indicators western urbanization development risk evaluation index system, and the use of AHP to determine the weight of each index, and lay the foundation for the evaluation of risk; again, according to the five scoring method to standardize the value of each index, to set the level of risk, risk assessment system in order to carry out scientific testing; Finally, according to the findings of the risk assessment analysis, drawing on the successful experience of other parts of the development of urbanization, proposed should be targeted to the urbanization of the western region risk prevention and control: speed up economic construction in the western town, and create a policy and institutional environment conducive to the development of urbanization, improve population quality, attention to the problem of unbalanced regional development, adhere to the sustainable development of urbanization .
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