环境工程学报2025，Vol.19Issue(8)：1847-1856,10.DOI:10.12030/j.cjee.202412021
旁路表流人工湿地在闸控河流水生态环境改善中的应用效果
Application effectiveness of bypass surface-flow constructed wetlands in improving aquatic ecological environments of sluice-controlled rivers
摘要
Abstract
While sluice construction enhances water resource utilization efficiency,it simultaneously increases the risk of river algal blooms.To evaluate the effectiveness of constructed wetlands in improving water ecological environments of sluice-controlled rivers,this study selected Dongxi River and its adjacent surface-flow constructed wetland in eastern Guangdong as research subjects.Through monthly water quality monitoring in 2023,along with hydrological observations and phytoplankton community analysis,we systematically assessed the wetland's purification efficiency and its ecological impacts.The results suggested that purification efficiency shows strong seasonal variation,with higher pollutant removal rates during wet seasons(28.68％～69.74％for NH3-N,TP,TN,and CODMn)compared to dry seasons(7.85％～38.75％).Algal control is remarkable,with an 80％reduction in phytoplankton density and chlorophyll-a(Chl-a)in treated water.During the continuous operation of the wetland in the dry season,the average treated water volume was 0.5 m3·s-1,accounting for 6.4％of the concurrent river flow.Under the combined influence of upstream inflow and the wetland's water extraction and replenishment,the average flow rate and velocity in the river section upstream of the sluice increased by 32.45％and 32.98％,respectively.Meanwhile,the phytoplankton density and Chl-a concentration in the river water decreased by 50.06％and 21.05％,respectively,leading to an improvement in the aquatic ecological environment upstream of the sluice.This demonstrates that bypass surface-flow constructed wetlands hold significant potential for mitigating eutrophication and controlling algal blooms in regulated slow-flow water bodies.关键词
闸控河流/旁路表流人工湿地/污染物去除率/水华防控Key words
sluice-controlled rivers/bypass surface-flow constructed wetlands/pollutant removal efficiency/algal bloom control分类
资源环境引用本文复制引用
熊励伟,杨忠勇,黄菊,范中亚,黄露,罗千里,杨京..旁路表流人工湿地在闸控河流水生态环境改善中的应用效果[J].环境工程学报,2025,19(8):1847-1856,10.基金项目
国家自然科学基金资助项目(U24A20180,42477086) （U24A20180,42477086）
国家重点研发计划资助项目(2022YFC3202200) （2022YFC3202200）
广东省基础与应用基础研究基金省市联合基金项目(2023A1515110183) （2023A1515110183）
中央级公益性科研院所基本科研业务费专项资金项目(PM-zx421-202410-379) （PM-zx421-202410-379）
