• 责任者：Huang Qibo (Institute of Karst Geology ; CAGS ; Guilin 541004 ; China) ; Liu Pengyu
• 刊名：Carsologica Sinica
• 出版年：2011
• 卷期：30(4)
• 关键词：岩溶作用 ; karstification ; 地下河 ; underground streams ; 碳 ; carbon ; 广西 ; Guangxi
• 页码：p.437-442
• 图表：3 illus., 4 tables, 11 refs.
• 分类号：1800
• 出版序号：20122717
• issnNo：ISSN1001-4810
• isbnNo：CN45-1157/P

///The HCO^-₃ concentration from 14 large karst springs and 16 outlets of the underground river in the Guijiang Catchment are tested. It is found that the average concentration of HCO^-₃ of groundwater is 223.62 mg/L in low water level period, 222.11 mg/L in normal water level period and 210.19 mg/L in high water level period. Although the mean concentration of HCO^-₃ in high water level period is lower than that in normal water level period, but the discharge in high water level period is highest, which is twice more than that in normal water level period and 2.8 times as many as that in low water level period, so the carbon sink in high water level period is 4.7 and 2.7 times more than that in normal and low water level periods, and the carbon sink in the three periods accounting for 63.13%, 13.35% and 23.51%, of the whole year,  respectively.