The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river

	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
发表期刊	Chinese Science Bulletin
卷号	59 期号:19 页码:2348-2355
摘要	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.
关键词	Dam Dissolved Inorganic Carbon Carbon Isotope Compositions Phytoplankton Wujiang River
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5234
专题	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
推荐引用方式 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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