环境保护科学2025，Vol.51Issue(1)：89-95,7.DOI:10.16803/j.cnki.issn.1004-6216.202310002
冬季汾河太原段水体pCO2的分布变化及影响因素
Distribution and influencing factors of pCO2 in the Taiyuan Section of the Fenhe River in winter
摘要
Abstract
The increasing anthropogenic interference makes the CO2 change of river system and its control more complicated in loess area,especially in urbanized river reach.Based on the monthly investigation of carbonate parameters at three fixed stations(Lancun Station,Xiangyunqiao station and Fenhe Erbaqiao Station)in Taiyuan Section of the Fenhe River from November 2020 to April next year,the temporal and spatial distribution of surface water partial pressure of CO2(pCO2)and its influencing factors were discussed.The results showed that compared with the dissolved inorganic carbon(DIC)(40.8 mg/L)and pCO2(643 μatm)levels of Lancun station as the background section,the DIC(37.9 mg/L)and pCO2(574 μatm)levels of Xiangyunqiao Station located in the ecological restoration park were reduced by aquatic primary production.DIC(55.7 mg/L)and pCO2(4 413 μatm)increased significantly in Erbaqiao Station downstream of the city due to the direct input of municipal sewage and degradation of organic matter.At the same time,the primary production and the degradation of organic matter are the main factors of pCO2 change in Xiangyunqiao Station and Fenhe Erbaqiao Station,respectively.On the whole,all the three stations were atmospheric CO2 sources in winter,but compared with the water-air CO2 flux of Lancun Station(169.0 mmol/m2/d).The CO2 flux of Xiangyunqiao Station(14.0 mmol/m2/d)and Fenhe Erbaqiao Station(2 832.4 mmol/m2/d)showed a decreasing and increasing process,indicating that the game relationship between ecological restoration and sewage input may be the key to promote the increase of CO2 sink and decrease of CO2 source in urban rivers.关键词
溶解无机碳(DIC)/CO2分压(pCO2)/水生初级生产/污水输入/汾河太原段Key words
dissolved inorganic carbon(DIC)/partial pressure of CO2(pCO2)/aquatic primary production/sewage input/Taiyuan Section of the Fenhe River分类
资源环境引用本文复制引用
党佳佳,李云霄..冬季汾河太原段水体pCO2的分布变化及影响因素[J].环境保护科学,2025,51(1):89-95,7.基金项目
国家自然科学基金(41376123) （41376123）
山西省基础研究计划青年项目(20210302124317) （20210302124317）
山西省高等学校科技创新项目(2020L0151) （2020L0151）
