In order to identify the migration transformation process of phosphorus in water body and sediments in Qixing wetland,the concentration and distribution of phosphorus in surface water and porewater were analyzed,the morphological distribution characteristics of phosphorus in sediments studied,and the diffusion flux of phosphorus in the sediment-overlying water interface measured. Pearson correlation analysis was used to distinguish the different forms of phosphorus in water body and sediments. The results showed that the spatial distribution characteristics of total phosphorus in water body and sediments were slightly different. The concentration of TP in water body and sediments was higher at the entrance of the Xixiao River and the Wanquan River,and the concentration in both of them was lower at the Yangchang River. At the same time,the concentration of TP in the main stream at exports of the wetlands was lower. IP was the main form of TP in sediments,accounting for 68. 27%-87. 41%. The proportion order of various forms of phosphorus in IP was NaOH-rP HCl-P Res-P NaOH-nrP BD-P. The diffusion flux of phosphorus in sediment-overlying water interface was positive,and the results showed that the sediments were important sources of phosphorus in the overlying water. Pearson correlation analysis also showed that BD-P from sediments was one of important inputs of phosphorus in body water,and TP and IP in sediments were mainly controlled by NaOH-rP.

随着经济的不断发展,资源消耗也随之增加,环境资源压力日益增加.面对这一状况,国家在”十一五”规划纲要中就提出了节能减排的具体目标.文章阐述了城市节能减排的意义及其现状,并提出了城市节能减排的发展思路与趋势.