Two reservoirs in series in a Karst area were investigated in this study to understand the impact of river damming on riverine C cycling. Monthly sampling strategy was performed in Hongfeng and Baihua reservoirs, from July, 2007 to June, 2008. DIC and its isotopic compositions were determined. pCO(2), and calcite saturation index (SIc) were then calculated. Results show that delta(13)C-DIC in surface water of these reservoirs responded clearly to the transformation between photosynthesis and respiration, which also changes the inorganic C equilibrium. Based on monthly monitoring data, the major biogeochemical processes along the water column in these reservoirs, was also discussed. It is noted that hypoliminion introduction for hydropower generation and then release can lead to the discontinuity of water chemistry along a river course, and has adverse effects on the downstream environment. (C) 2011 Elsevier Ltd. All rights reserved.

Publication name	APPLIED GEOCHEMISTRY　Volume: 26 　Supplement: S 　Pages: S375-S378　 Published: JUN 2011
Author(s)	Wang, Fushun; Liu, Cong-Qiang; Wang, Baoli; Liu, Xiaolong; Li, Ganrong; Guan, Jin; Yao, Chenchen; Wu, Yiying
Corresponding author	WANG Fushungqiang  fswang@shu.edu.cn  Shanghai Univ, Sch Environm & Chem Engn, Nanchen Rd 333, Shanghai 200433, Peoples R China
Author(s) from IGCAS	Liu, Cong-Qiang; Wang, Baoli; Liu, Xiaolong; Li, Ganrong; Guan, Jin;

View here for the details from the publisher