Study Of The Expressway Environmental Impact Assessment

Expressway is a special man-made belt-like construction and it passes vast territories, has wide-range impact and many influencing factors and furthermore, its effect is hard to make up and forecast. Therefore, expressway construction environmental impact assessment plays a very important role I expressway construction and social economy and environmental protection coordinated development and environmental planning and decision-makings.Due to China' s national situation and the limitations of expressway itself, traditional expressway construction project environmental assessment, plays an important role actively while at the same time has many shortcomings. The essay, on the basis of expressway construction environmental assessment current condition, conducts analysis on the existing problems in expressway construction project environmental assessment content and assessment index system. On the basis of assessing the guidance and investigation monitoring of experimental codes, the essay conducts research on expressway construction project environmental assessment system.The paper applies sustainable development concept and constructs social and economic assessment system, which manifests the relationship between expressway construction and social, economic environment sustainable development. Accordingly, the assessment system that has lots of mutual relationship factors is made to numerical modeling and assesses a composition integer with introduction of step rank association and Grey system model.On the basis of the whole environmental impact analysis and the overall environmental counter-measures planning, the essay proposes expressway construction environmental assessment system: on the basis of environmental impact assessment, it should actively carry out strategic environmental assessment, regional environmental impact assessment and environmental impact post assessment to form four-level comprehensive assessment system. The purpose of the system is to effectively control the total emission quantity of various...