泥沙研究2025，Vol.50Issue(5)：1-8,41,9.DOI:10.16239/j.cnki.0468-155x.2025.05.001
三峡大坝下游宜昌站pCO2变化研究
Study on the changes in pCO2 of Yichang station at the downstream of the Three Gorges dam
摘要
Abstract
Rivers are important channels connecting the major carbon pools of land and ocean,playing a cruci-al role in the global carbon cycle.As the largest river in China,the Yangtze River plays an important role in the river carbon cycle.Since the construction and operation of the Three Gorges dam,significant changes have occurred in the flow-sedimentary regimes at the Yichang station,which is downstream adjacent to the dam.However,there is still a lack of systematic research on the changes in pCO2 in waters downstream of the Three Gorges dam.Therefore,taking the Yichang Hydrological station as the study site and based on the hydrochem-ical data at this station before and after the construction of the Three Gorges dam(1958-2018),the formula for calculating alkalinity according to the relation of cross-sectional discharge and dissolved inorganic carbon has been constructed,and the temporal changes in pCO2 at Yichang station before and after the construction of the Three Gorges dam are calculated and analyzed,and the main influencing factors that caused the changes and their temporal variations have been explored.The results provide a scientific basis for evaluating the im-pact of dam construction on downstream carbon cycle and environmental changes.关键词
pCO2/河流碳循环/宜昌水文站/长江/三峡工程Key words
pCO2/river carbon cycle/Yichang hydrological station/Yangtze River/Three Gorges Project分类
资源环境引用本文复制引用
吴雪,黄海,关见朝,王乐..三峡大坝下游宜昌站pCO2变化研究[J].泥沙研究,2025,50(5):1-8,41,9.基金项目
国家重点研发计划项目(2022YFC3202003) （2022YFC3202003）
水利部重大科技项目(SKR-2022055) （SKR-2022055）
国家自然科学基金项目(52009041) （52009041）
中国水利水电科学研究院基本科研业务费专项(SE0145B042021,SE110145B0022023) （SE0145B042021,SE110145B0022023）
水利部泥沙科学重点实验室与中国水利水电科学研究院开放研究基金项目(IWHR-SEDI-2023-03) （IWHR-SEDI-2023-03）
中央高校基本科研业务费专项(2023MS065) （2023MS065）
