The Environmental Impact Prediction Andassessment On Guigu Interchange Overpass

Based on the analysis on the results of previous studies from domestic and foreign literature, combined with the characteristics of the highway or overpass project environmental impact, on Guigu interchange overpass project, the focus of water environment, sound environment, atmospheric environment and ecological impact at construction period and operation period in Changchun City was analyzed and forecasted, the conclusions were obtained as following:(1) Ecological Environmental ImpactThis project destroyed the original land use form of the project construction on land the original nutrition structure and the physical and chemical properties turbulence, thus damage to land the original ecosystem circulation system, caused a certain degree of soil erosion. Although the division of ecological effects on animals was inevitable, but as a result of influence range was small, and as the growth of the running time, animals would gradually adapt to the environment along the road.Therefore, the construction of the project on the ecological effects of habitat fragmentation was smaller.(2) Atmospheric environmental impactDuring the period of construction, the ambient air pollution was mainly the secondary dust produced by pavement construction, material transport(especially fly ash transportation). Therefore, we need to pay attention to the construction site location selection and the protection of the workers. The run-time environment influence mainly would come from the smoke by staff’s normal life in the toll booth and car exhaust emissions.(3)Water environment influenceDuring the period of construction, the sanitary sewage from the constructors wassimple, and the discharge of sewage was small. There will set the anti-seepage latrine,the desilter collecting construction waste water. So, there would be no fundamental influence on surface water. During operation, road runoff pollutants were mainly suspended solids, petroleum and organic matter, which were influenced by rainfall intensity, traffic volume, vehicle type, dust settlement and prophase drought factors.Therefore, it has certain uncertainty.(4) Sound environmental impactDuring the period of construction, the noise impact was bigger, which was mainly caused by mechanical equipment vibration noise. And its influence mainly concentrated in the construction area. After the completion of the project, no matter day or night it can be forecasted that all of the environmental sensitive sites will exceed standards. Construction units should take measures, such as set sound proof window etc, which were used to reduce the effects of traffic noise on the street side residential buildings.