收稿日期: 2015-05-21
网络出版日期: 2016-08-30
基金资助
国家水体污染控制与治理科技重大专项(2012ZX07104-001); 国家自然科学基金资助项目(41273128, 41473082)
Partial pressure and diffusion flux of dissolved carbon dioxide in mainstream and tributary (Zhuyi River) of the Three Gorges Reservoir in summer
Received date: 2015-05-21
Online published: 2016-08-30
以三峡库区中长江干流及其支流朱衣河作为主要研究对象, 于2013 年5—7 月对该研究区域干支流的CO2 分压进行了研究, 并计算出CO2 的扩散通量. 研究结果表明, 在水体剖面上表层水体CO2 分压最小; 随着水深增加, CO2 分压急剧增大, 到达10 m 后才保持稳定. 干支流表层水体CO2 分压的分布和扩散通量差异显著. 5—7 月, 干流水体表层CO2分压为220.8~268.0 Pa, CO2扩散通量为51.05 mmol·m−2·d−1; 支流水体表层CO2 分压为14.9~190.3 Pa, 3 个月的CO2 扩散通量分别为0.42, −0.12 和20.83 mmol·m−2·d−1. 研究结果表明, 支流释放的CO2 远小于干流.
魏浩斌1, 吴学谦1, 操满1, 傅家楠1, 贾晓斌1, 邓兵2, 汪福顺1 . 三峡库区干流及库湾支流(朱衣河)夏季CO2 分压及扩散通量[J]. 上海大学学报(自然科学版), 2016 , 22(4) : 497 -504 . DOI: 10.3969/j.issn.1007-2861.2015.01.011
The mainstream and tributary of the Three Gorges Reservoir were investigated from May 2013 to July 2013 to understand the distribution of the partial pressure of carbon dioxide. The results show that, along the water column of the tributary (Zhuyi River), the lowest value of the partial pressure of carbon dioxide appears in surface water, and increases rapidly with depth. Below 10 meters in depth, the partial pressure of carbon dioxide becomes stable. There are significant differences of the partial pressure of carbon dioxide in surface water between mainstream and tributaries. During the period of investigation,
the partial pressure of carbon dioxide in the surface water of the mainstream is 220.8~268.0 Pa, with an average CO2 emission fluxes of 51.05 mmol·m−2·d−1. The partial pressure of carbon dioxide in the surface water of tributary (Zhuyi River) is 14.9~190.3 Pa. Emission flux of CO2 in the three months are 0.42, −0.12 and 20.83 mmol·m−2·d−1. The result indicates that the tributary Zhuyi River emits less CO2 than the mainstream.
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