人工湿地建设项目在辽河流域生态治理中的应用

辽河在辽中县多年平均径流量为27.3亿m3，河道水质影响差异较大，枯水期属重度污染，COD、氨氮等4项指标超标，岸滩湿地被开垦为农田，造成了水土流失，大量的化肥和农药投入，使得流域非点源污染逐年递增，缺少生态用水，维持河道内生物繁衍和滩地内植被生长的水量严重不足。针对问题进行人工湿地建设取得良好的生态效益。

Application of Artificial Wetland Construction Project in Liaohe River Basin Ecological Management

The average yearly runoff is 27.3 ＆#215;10 8 m3 at Liaozhong County section in Liaohe River ,the water quality varies greatly in different seasons.It is severe polluted in the dry season ,4 indicators, including COD,ammonia nitrogen ,exceed the standard.Floodplain wetland is reclaimed into farmland , soil erosion appears ,a lot of chemical fertilizer and pesticide are input ,the non-point source pollution is increasing year by year and lack of ecological water use ,there is a severe water shortage for maintaining instream biological reproduction and floodplain vegetation growth.Aiming at the above problems , the construction of artificial wetland achieves good ecological benefits .