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of resource-environment-economy-social harmonious development in projects. Based on the ecological impact assessment needs, using scientific principles, this paper gives the index system for major ecological impact assessment of the Large Scale Engineering Projects in order to provide a reference. Large scale engineering projects are the ones which have great impacts on people's livelihood or socio-economy, politics, culture and ecological environment in certain areas with certain scale of investment. Large scale engineering projects include major water conservancy and hydropower projects, major transportation projects, industrial areas of important projects and other projects, and they are the projects which are likely to lead to social conflicts. Large Scale Engineering Projects demand long construction period, large capital investment, huge scale of construction and throughout the life cycle after their construction and commissioning. Therefore, the large scale construction of ecological civilization is the fundamental method to alleviate the problems of ecology. Ecological cumulative effects of large scale projects have great influence on the scope of its ecology. In space, the ecological impacts of large scale projects show a "three-dimensional" feature and have impacts on hydrology, climate, soil, humanities; in time, effects of Large Scale projects on Ecology show a "long-term" characteristic. Characteristics of the ecological effects of large scale projects determine that only by studying the effects of large scale projects on ecology from the perspective of life cycle can we jump out of the traditional project management routines , integrate all elements of projects such as project objectives, targets, processes and technology under the view of lifecycle, and strive to achieve overall optimal goal throughout the lifecycle. Therefore, based on the life cycle theory, this paper establishes a more scientific large scale project evaluation index system to assess its ecological impacts on the whole process from the decision-making, experience design argument, construction and operation maintenance to scrap recycling. II. LITERATURE REVIEW

A Study on Ecological Impacts of the Large Scale Engineering Project Evaluation System under the View of Life Cycle