生态环境学报2025，Vol.34Issue(10)：1598-1608,11.DOI:10.16258/j.cnki.1674-5906.2025.10.010
城市河渠-人工湖连通系统表层溶存N2O浓度及排放通量研究
Surface Dissolved N2O Concentration and Emission Fluxes in an Urban River-canal-artificial Lake Linkage System
陈凡 1吴乔枫 2池善庆 3林财强 3俞伯林 3谢蓉蓉 4李家兵 4黄翔峰 5张海平 5刘佳5
作者信息
- 1. 福建师范大学环境与资源学院/碳中和现代产业学院,福建 福州 350007
- 2. 福州市城乡建总集团有限公司,福建 福州 350001||同济大学环境科学与工程学院,上海 200092
- 3. 福州市城乡建总集团有限公司,福建 福州 350001
- 4. 福建师范大学环境与资源学院/碳中和现代产业学院,福建 福州 350007||福建师范大学/福建省污染控制与资源循环利用重点实验室,福建 福州 350007||数字福建环境监测物联网实验室,福建 福州 350007
- 5. 同济大学环境科学与工程学院,上海 200092
- 折叠
摘要
Abstract
A comprehensive examination of the production and discharge characteristics of dissolved N2O,along with its influencing factors,in urban water bodies affected by residential drainage is imperative to effectively regulate greenhouse gases in urban waters.A natural river-drainage canal-artificial lake linkage system in Fuzhou was selected to study the daily and seasonal changes of dissolved N2O in the surface layer of a typical urban water body under the influence of residential drainage water and to the identify the main environmental impact factors.The findings indicated that the surface-dissolved N2O concentrations in the study area were moderate,ranging from 11 to 476 nmol·L-1.However,the emission fluxes were lower than those observed in most urban rivers,ranging from 5 to 763 nmol·m-2·h-1.This discrepancy can be attributed to the mitigation of greenhouse gas production and emissions by the river-lake connectivity system.Second,the surface-dissolved N2O concentration in the outfall channel was significantly higher than that in natural rivers and artificial lakes.This variation was primarily attributed to the high nitrogen environment,pH,and DO levels,with significant daily variations observed in all seasons.Conversely,the concentration of dissolved N2O in natural rivers and artificial lakes exhibited a minor peak at 6:00 p.m.in the fall season.Third,the surface layer of the outfall channel exhibited a substantially elevated emission flux compared with that of natural rivers and artificial lakes.This surface layer exhibited substantial daily variations at all observation points,which were influenced by wind speed and nitrogen content.Emission peaks were observed at 6:00 p.m.in all seasons except fall,when the urban rivers and canals reached their peak at 1:00 p.m.The natural rivers flowing through the city(R1)exhibited a substantial response to nitrogen and wind speed.Conversely,natural rivers that traverse woodlands and parks(R3)exhibited negligible correlations with the environmental factors.The environmental impact factors associated with sewage canals and man-made lakes fell within the ranges of R1 to R3.This study provides a foundational theoretical framework for examining N2O greenhouse gas distribution patterns,emission characteristics,and environmental impact factors within urban river and lake systems.关键词
城市河湖连通系统/溶存N2O/排放通量/时空变化/氮元素Key words
urban river and lake connectivity system/dissolved N2O/emission flux/spatio-temporal change/nitrogen分类
资源环境引用本文复制引用
陈凡,吴乔枫,池善庆,林财强,俞伯林,谢蓉蓉,李家兵,黄翔峰,张海平,刘佳..城市河渠-人工湖连通系统表层溶存N2O浓度及排放通量研究[J].生态环境学报,2025,34(10):1598-1608,11.
