A Typical Research on the Variation of CO2 Partial Pressure in Riverine Water Discharging from a Full Penetration Type Karst Spring Basin
Abstract
We researched the riverine carbon geochemical process of the dissolved inorganic carbon declared from the karst groundwater system in the course of the ground water discharge in order to assessed the significant influence on the estimating carbon sink of the karstic basin drainages. This essay analyzed the variation of the partial pressure values of water carbon dioxide (pCO2) by measuring the change of pH, ORP, Cond, TDS and other parameters in the process of the outflow on the typical karst groundwater of the Dengzhaihe subterranean basin in the Puding County of the Guizhou province. The result indicated that the pCO2 was gradually decreasing after karst groundwater flows out of the subterranean basin drainage. The riverine carbon dioxide was cleared by the aquatic photosynthesis and calcite deposition in the process of the karstic groundwater outflowing, which implied that the mechanism of the karst-photosynthesis collecting riverine has the vital scientific significance on the karst rivers runoff process to the globle carbon budgeting .
Keywords
Karst subterranean stream, The process of outflow, Partial pressure of water carbon dioxide, Aquatic photosynthesis, Autgassing
DOI
10.12783/dteees/eccsd2016/5827
10.12783/dteees/eccsd2016/5827
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