Study On Wetland Plants Choice And Configuration Mode In Huai'an-Yancheng Expressway

With the rapid development of expressway in our country,it brings convenient traffic to people,sometimes it passes through wetland unavoidably.Huai'an-Yancheng expressway has already opened to the traffic at present.It passed through Sheyang Lake,then the small wetland was blocked in many places along this expressway.The wetland is distributing extensively,so the choice of wetland plants and application of configuration mode are the key points in rebuilding wetland ecosystem in this expressway.Wetland along Huai'an-Yancheng expressway is investigated at first.The application of wetland plants is analyzed along this expressway.In this way,the proportion of xylophyta is a bit high,and the application of herb is too low.Hyclrophyte is moderate in proportion,so it offers abundant materials for construction of the wetland view.It is a shining spot in this expressway.While ensuring its ecological function,abundant hyclrophyte creates the wetland view variously.Under the investigation of wetland plants,twenty kinds of extensive wetland plants are chosen to carry on adaptability research in Huai'an-Yancheng expressway.Because adaptability is a comprehensive reflection to the environment,a lot of indexes are adopted to evaluate the adaptability.The principal components analysis and the subordinate function analysis are carried on the comprehensive evaluation of adaptability.It is learnt that the adaptability of this twenty plants is arranged in an order from strong to weak.The main object of this text is four exchanges,including Cheqiao exchange, Yanchengxi exchange,Yanchengnan exchange and Yanchengdong exchange.It sums up five kinds of wetland plants configuration modes,which are the mode covered with arbor,bush and grass,the cover plants and herbaceous flowers mode,the emergent plant mode,the floating plant mode and Phragmites australis mode.The subordinate function analysis and AHP are applied to analyze the level.The mode which is covered with arbor,bush and grass is superior to the rest four kinds of modes.Furthermore,four configuration forms are chosen in this mode,and can be used to similar environment of wetland along the expressway.