| The exploitation of cascade hydropower in a river basin is an international tendency and also the fundamental hydropower energy policy in China. Hydropower is a clean energy, China is rich in waterpower resources, providing favorable conditions for the development of hydropower. Although the benefits of development were remarkable, but thought of ecological environment. With the rise of hydropower development, environmental impact assessment has been more attention Building a model of the evaluation index system has become a major issue with the way one.Traditional methods of evaluation index system in the main static methods, such as AHP, principal component analysis. Indicators that is not conducive to the dynamic system, evaluation system usability, reliability, robustness decline.UML is an object-oriented programming language, but it is also a description of a unified standard, simultaneously static definition of the structure and dynamics of the system, so different from the effective expression, and comprehensive information. reduce the loss of information in the course of transmission, has a dynamic, flexible.It will be used more and more abstract system more interdisciplinary analysis, UML will gradually replace the AHP. Principal Component Analysis, Cascade Ecological Environment Construction Evaluation System become the main method.Therefore, this paper the characteristics of the cascade hydropower development. hydropower project on the ecological analogy comparative analysis of the environmental impact assessment system. Cascade hydropower project to establish the ecological characteristics of the environmental impact evaluation factor; On this basis, using UML methods and techniques Construction of the structure of the cascade hydropower development and ecological system of environmental impact evaluation model. Evaluation focused on building a framework model of migrants and eutrophication assessment model. Construction of the model, a method of its construction. |
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