| The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river | |
| Xi Peng; Cong-Qiang Liu; Baoli Wang; Yan-Chuang Zhao | |
| 2014 | |
| Source Publication | Chinese Science Bulletin
 |
| Volume | 59Issue:19Pages:2348-2355 |
| Abstract | To determine the impact of damming on the geochemical behavior of dissolved inorganic carbon (DIC) in the Wujiang River basin, field measurements and samples were collected semimonthly for a year. The surface waters of the reservoirs contained concentrations of chlorophyll a up to 5.6 times higher than the upstream river. Compared with the entering waters, the contributions of HCO3 (-) and dissolved CO2 to DIC decreased, and the contribution of CO3 (2-) to DIC and the carbon isotopic composition of DIC (delta C-13(DIC)) increased in the surface waters of the reservoirs, while in the waters released, the DIC species showed reverse geochemical behaviors. The delta C-13(DIC) ranged from -10.2 aEuro degrees to 2.5 aEuro degrees, indicating that significant contributions were from carbonate weathering, photosynthesis, and respiration. After the damming of a river, the bioactivity of phytoplankton was enhanced, and this affected the geochemistry of DIC compared to an unimpacted river and delta C-13(DIC) can be used to discern these changes. High-frequency monitoring of river-reservoir systems is necessary to evaluate the efflux of CO2 and provide a better understanding of the carbon sinks and sources in the impounded river. |
| Keyword | Dam Dissolved Inorganic Carbon Carbon Isotope Compositions Phytoplankton Wujiang River |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5234 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Xi Peng,Cong-Qiang Liu,Baoli Wang,et al. The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river[J]. Chinese Science Bulletin,2014,59(19):2348-2355. |
| APA | Xi Peng,Cong-Qiang Liu,Baoli Wang,&Yan-Chuang Zhao.(2014).The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river.Chinese Science Bulletin,59(19),2348-2355. |
| MLA | Xi Peng,et al."The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river".Chinese Science Bulletin 59.19(2014):2348-2355. |
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