The Ecological Control Method of the Highway Construction A Case Study

With the fast development of Chinese economy, expressway, as the most important portion of the highway networks, had been developed at an astonishing fast speed, which brought on increasingly severe ecological environmental problems in the mean time such as soil and water loss, damage of vegetation ecosystem, geological environment and water environment etc. As a result, the ecological environmental control of highway construction presents great strategic sense in realizing the coordination between the highway construction and the social, economic, environmental benefit.Based on the electric-map of land use of Chongming Island in 1:10000 and aided by the software of ARC GIS9.1, This paper, took the Chong-Qi Highway crossing Chongming Island as an example, selected the main ecological factors of water, farm, mudflat, forest wood and building areas, and carried on the risk assessment of them by an eco-control model of ecological node. As a result, the key ecological nodes of this case were selected the corresponding methods were put forward according to the life cycle of the highway.