开放型湖泊应用湿地修复技术效果研究OA

To further explore the ecological remediation effects of open lakes using wetland restoration technology,a survey on water quality and phytoplankton community characteristics was carried out in Yangcheng Lake from 2020 to 2021,with the ecological restoration project of Middle Yangcheng Lake as the study object.The results showed that wetland restoration exerted a significant purification effect on nitrogen and phosphorus nutrients in the lake.Combined with interception and sedimentation,the reduction rates of total phosphorus and total nitrogen in upstream inflow by the restored wetland zone reached 17%-56%and 16%-44%,respectively.During the investigation,7 phyla and 74 species(genera)of phytoplankton were identified in Yangcheng Lake.The phytoplankton diversity indices in the restored areas were higher than those in the non-restored areas,indicating that the phytoplankton communities in the restored zones were more stable,which was also consistent with the water quality monitoring results in this study.