人民长江2025，Vol.56Issue(3)：55-62,8.DOI:10.16232/j.cnki.1001-4179.2025.03.008
大型输水明渠水工建筑物对水质变化的影响分析
Influence of hydraulic structure on water quality change in large open channel of water conveyance
摘要
Abstract
As an important infrastructure of open channel in water conveyance,hydraulic structures may affect the water quality of the channel by changing the hydrodynamic conditions and pollutant migration process.Taking the main canal of the middle route of South-to-North Water Diversion Project as the research object,the influence of hydraulic structures on the water quality of the canal was analyzed through the investigation and sampling at typical hydraulic structures such as inverted siphon/aqueduct and sluice gate.The results showed that:① On the time scale,the seasonal differences of water temperature,DO,pH,permanga-nate index(CODMn),dissolved permanganate index(DCODMn),particulate permanganate index(PCODMn),total nitrogen(TN),dissolved total nitrogen(DTN),total phosphorus(TP),dissolved total phosphorus(DTP)and particulate total phosphorus(PTP)were significant(P<0.05),while the seasonal differences of particulate total nitrogen(PTN)were not significant(P>0.05).On the spatial scale,the water temperature,pH,DO,CODMn and DCODMn in the investigated canal showed a significant upward or downward trend(P<0.05).②PCODMn at the outlet of inverted siphon/aqueduct and other hydraulic structures was significantly higher than that at the inlet in summer(P<0.05),but there was no significant difference in spring and autumn(P>0.05).In spring,the pH at the sluice gate was significantly higher than that in the water conveyance channel(P<0.05),but there was no significant difference in summer and autumn(P>0.05).The research results can provide a basis for scientifically understanding of the water quality change law in large-scale open channels and optimizing water quality management.关键词
水质/水工建筑物/输水明渠/南水北调中线总干渠Key words
water quality/hydraulic structure/open channel of water conveyance/main canal of middle route of South-to-North Water Diversion Project分类
环境科学引用本文复制引用
习刚正,肖新宗,张屹哲,贾海燕,王超..大型输水明渠水工建筑物对水质变化的影响分析[J].人民长江,2025,56(3):55-62,8.基金项目
湖北省自然科学基金项目(2022CFB342) （2022CFB342）
水利部重大科技项目(SKS-2022125) （SKS-2022125）
中国南水北调集团科研专项(NSB-DZX/SH/KY/2022-001) （NSB-DZX/SH/KY/2022-001）
