Study On The Method Of Comprehensive Impact Assessment For The Resources Exploitation Project And The Countermeasure For Ecological Restoration

With the development of economic, the contradictory between the limited natural resources and the limitless social demand has being more and more obvious gradually. in order to improve the ecological environment and protect the precious natural resources and ecological environment, the eco-environment impact should be evaluated quantitatively and forecasted reasonably. Ecological environmental impact Ecological environmental is a comprehensive analysis that the eco-environment and construction activities, as for the trait of ecological impact is potential, cumulative and integrity, it is different from common pollution construction projects and activities, so it is of vital significance to find a simple and practical method to quantitatively evaluate the ecological environment quality.The system of comprehensive eco-environmental impact assessment, including the selection of index system, weight calculation, ecological environmental assessment, forecasting method, data normalization and index normalized coefficient calculating procedure.The index system for evaluating the eco-environment quality in Pingshuo mining area was developed based on analyzing the peculiar properties and features of the ecosystems in northwest China according to the principles of the integration, representation, dynamics, scientific and practicability, the first layer of the index system was the eco-environment quality index, The second layer include soil degradation index, water quality index, vegetation coverage index and environmental quality index. Moreover, the weights of all the evaluating factors were defined by using the analytic hierarchy process (AHP) and the indexes were processed by index method. Combined the ecosystem comprehensive evaluation with comprehensive index method, and then according to the index normalized coefficient method. This system was applied to the eco-environmental impact assessment in Pingshuo area. The index normalized coefficient method was discussed and studied mostly. The ecological environment quality index in different area was different, so the assessment area was divided into many small regions. The middle eco-environment quality index in every region was counted, and then the max one was chosen as the index normalized coefficient.The result indicated that the system was simple and logical, practicable. The variation of eco-environment quality was digitized visually between before and after the project. It was estimated that the synthetic index of the ecological environment in Pingshuo area will be 82.56 in2010. it became worse obviously, the variation of the eco- environment quality index(|â–³EI) is 6.76>5. This system was applied not only to regional eco-environmental status evaluation, but also to the eco-environmental impact assessment. Provide Research findings paved the way for the work of the eco-environmental impact assessment in the future, and charted the path for exploiting the natural resources and designing the rehabilitation and reconstruction of the ecosystem. In the final analysis, in terms of the finding, the effective ways and measures were come up to protect the ecological environment and achieve ecological resources for sustainable development.