同济大学学报（自然科学版）2026，Vol.54Issue(3)：403-412,10.DOI:10.11908/j.issn.0253-374x.25006
感潮河岸潜流带地下水三氮时空差异与驱动因子分析
Spatiotemporal Variations and Driving Factors of Inorganic Nitrogen in Groundwater in Tidal Riparian Hyporheic Zones
摘要
Abstract
The hyporheic zone is a place where river water and groundwater frequently interact,whose internal nitrogen cycle is of great significance for maintaining the ecological health of rivers.Taking tidal rivers in the Shanghai as the research object,the seasonal variations in inorganic nitrogen concentrations in groundwater in the riparian hyporheic zone and their key driving factors were investigated using on-site monitoring,sampling tests and statistical analysis.The results show that ammonia nitrogen(NH₄⁺—N)and nitrate nitrogen(NO₃⁻—N)concentrations were significantly higher during the hyporheic flow(HF)net inflow period than those during the HF net outflow period,while nitrite nitrogen(NO₂⁻—N)concentration was extremely low.With increasing distance from the river,the dominant form of inorganic nitrogen shifted from NO₃⁻—N to NH₄⁺—N,and NH₄⁺—N concentration initially increased and then decreased while NO₃⁻—N concentration gradually decreased.The key factors influencing the changes in inorganic nitrogen concentrations in groundwater in the hyporheic zone were hyporheic exchange flux,Eh,and pH during the HF net inflow period,and Eh and hyporheic exchange flux during the HF net outflow period.The function of hyporheic zone in tidal riverbanks tends to be a nitrogen sink during the HF net inflow period and a nitrogen source during the HF net outflow period.关键词
感潮河流/河岸潜流带/氮/赋存特征/驱动因子Key words
tidal river/riparian hyporheic zone/nitrogen/occurrence characteristics/driving factors分类
天文与地球科学引用本文复制引用
邢婧文,周念清,王在艾,蔡奕,李娜,赵文刚,陆帅帅..感潮河岸潜流带地下水三氮时空差异与驱动因子分析[J].同济大学学报（自然科学版）,2026,54(3):403-412,10.基金项目
国家自然科学基金(42377062,42077176) （42377062,42077176）
上海市自然科学基金(20ZR1459700) （20ZR1459700）
