| Along with the rapid increase of our country economic, our highway has developed greatly. The total course of development mileage has been 1,765,000km, in which the mileage of freeway is 25,130km by end of 2002. Although the construction of freeway can improve the traffic conditions and can accelerate the area socioeconomic development along the line, it brings a lot of environmental problems, mostly are the destruction and the pollution of the environment.This article deals with the practical environmental impact of Hu-Hang-Yong Freeway widening project, and the primary job is shown as follows:1. The natural environment, zoology environment, water environment, atmosphere environment and social environment of the area along with Hu-Hang-Yong Freeway has been analyzed deeply, and the main sensitive reference point of the environmental impact has been confirmed, which lay a foundation of forecasting and appraising of the environmental impact of Hu-Hang-Yong Freeway widening project.2. Through the analysis and investigation of the former Hu-Hang-Yong Freeway's soil, the status quo of soil and propagation and agriculture production, the fence method of water and soil, and the environmental renew measure along the line, the environmental impact of appraisal area is forecasted to be on the small side. And the adoption to project fence methods correspondingly in the freeway design, construction and operation can decrease the adverse impact to the less content of vegetation destruction, soil usage and the change of agriculture plantation, and the same time which has no marked impact on the distributing pattern of the soil and the vegetation. Adoption to the measures of project and foliage can decrease the flows of water and soil greatly.3. The lager river of widening project is Qiantangjiang River. According to the measurement, the current water quality of Qiantangjiang River has been polluted to some extent. The primary impact on water environment of widening project is the bore sediments of bridge construction and the encampment life sewage. Adoption to the measures of the solidify disposal of mud deposition, the life sewage unite collection disposal and let after reaching the standard can decrease the impact on water environment.4. The yawp pollution of freeway to the ambience is rather severe. Through the measurement of the day and night yawp of important spots, such as residential spots and schools, along with the former Hu-Hang-Yong Freeway, sound environment quality is found to be bad, and most of which overstep the country standards. After widening the freeway, the yawp pollution certainly will be aggravated. Though forecasting of adoption to some relational modules in the Environment Impact Appraisement Criterion of Highway Construction Project, the sensitive area such as residential spots and schools must take steps of sound barrier and virescence to settle the yawp superscale problems.5. Through the forecast and analysis of status in quo of atmosphere environment and vehicle flow after the highway widening, it is known that the construction has little impact on air quality, and the operation will have an adverse impact on ambience atmosphere environment. The forecast calculation indicates that at the most adverse conditions the gas emitted by vehicles of the most increment (about 5 meters) at peak hour traffic flow can reach 5 times or so of the second standard. And at the least conditions will be 1.1 times. N02 will be the most primary pollutants, whose superscale will be less than 200m.6. From the long-range point, the construction of widening project can be in favor of high speed development of the social and economic in Hangzhou and Jiaxing, and can promote the structure adjustment and development of three industrials, can improve traffic environment and can improve people's life quality. The widening project will occupy part of soil and plantation, which will have some impact on agriculture production. And in the period of construction the Hu-Hang-Yong Freeway will have...
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