TY - JOUR
T1 - Greenhouse gases emission from the sewage draining rivers
AU - Hu, Beibei
AU - Wang, Dongqi
AU - Zhou, Jun
AU - Meng, Weiqing
AU - Li, Chongwei
AU - Sun, Zongbin
AU - Guo, Xin
AU - Wang, Zhongliang
N1 - Publisher Copyright:
© 2017
PY - 2018/1/15
Y1 - 2018/1/15
N2 - Carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) concentration, saturation and fluxes in rivers (Beitang drainage river, Dagu drainage rive, Duliujianhe river, Yongdingxinhe river and Nanyunhe river) of Tianjin city (Haihe watershed) were investigated during July and October in 2014, and January and April in 2015 by static headspace gas chromatography method and the two-layer model of diffusive gas exchange. The influence of environmental variables on greenhouse gases (GHGs) concentration under the disturbance of anthropogenic activities was discussed by Spearman correlative analysis and multiple stepwise regression analysis. The results showed that the concentration and fluxes of CO2, CH4 and N2O were seasonally variable with > winter > fall > summer, spring > summer > winter > fall and summer > spring > winter > fall for concentrations and spring > summer > fall > winter, spring > summer > winter > fall and summer > spring > fall > winter for fluxes respectively. The GHGs concentration and saturation were higher in comprehensively polluted river sites and lower in lightly polluted river sites. The three GHGs emission fluxes in two sewage draining rivers of Tianjin were clearly higher than those of other rivers (natural rivers) and the spatial variation of CH4 was more obvious than the others. CO2 and N2O air-water interface emission fluxes of the sewage draining rivers in four seasons were about 1.20–2.41 times and 1.13–3.12 times of those in the natural rivers. The CH4 emission fluxes of the sewage draining rivers were 3.09 times in fall to 10.87 times in spring of those in the natural rivers in different season. The wind speed, water temperature and air temperature were related to GHGs concentrations. Nitrate and nitrite (NO3 − + NO2 − − N) and ammonia (NH4 + − N) were positively correlated with CO2 concentration and CH4 concentration; and dissolved oxygen (DO) concentration was negatively correlated with CH4 concentration and N2O concentration. The effect of human activities on carbon and nitrogen cycling in river is great.
AB - Carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) concentration, saturation and fluxes in rivers (Beitang drainage river, Dagu drainage rive, Duliujianhe river, Yongdingxinhe river and Nanyunhe river) of Tianjin city (Haihe watershed) were investigated during July and October in 2014, and January and April in 2015 by static headspace gas chromatography method and the two-layer model of diffusive gas exchange. The influence of environmental variables on greenhouse gases (GHGs) concentration under the disturbance of anthropogenic activities was discussed by Spearman correlative analysis and multiple stepwise regression analysis. The results showed that the concentration and fluxes of CO2, CH4 and N2O were seasonally variable with > winter > fall > summer, spring > summer > winter > fall and summer > spring > winter > fall for concentrations and spring > summer > fall > winter, spring > summer > winter > fall and summer > spring > fall > winter for fluxes respectively. The GHGs concentration and saturation were higher in comprehensively polluted river sites and lower in lightly polluted river sites. The three GHGs emission fluxes in two sewage draining rivers of Tianjin were clearly higher than those of other rivers (natural rivers) and the spatial variation of CH4 was more obvious than the others. CO2 and N2O air-water interface emission fluxes of the sewage draining rivers in four seasons were about 1.20–2.41 times and 1.13–3.12 times of those in the natural rivers. The CH4 emission fluxes of the sewage draining rivers were 3.09 times in fall to 10.87 times in spring of those in the natural rivers in different season. The wind speed, water temperature and air temperature were related to GHGs concentrations. Nitrate and nitrite (NO3 − + NO2 − − N) and ammonia (NH4 + − N) were positively correlated with CO2 concentration and CH4 concentration; and dissolved oxygen (DO) concentration was negatively correlated with CH4 concentration and N2O concentration. The effect of human activities on carbon and nitrogen cycling in river is great.
KW - Dissolved concentration
KW - Emission flux
KW - Greenhouse gas
KW - Influencing factors
KW - Sewage draining rivers
KW - Tianjin
UR - https://www.scopus.com/pages/publications/85029006746
U2 - 10.1016/j.scitotenv.2017.08.055
DO - 10.1016/j.scitotenv.2017.08.055
M3 - 文章
C2 - 28903174
AN - SCOPUS:85029006746
SN - 0048-9697
VL - 612
SP - 1454
EP - 1462
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -