Sensitivity of chemical weathering and dissolved carbon dynamics to hydrological conditions in a typical karst river.

ABSTRACT: To better understand the mechanisms that hydrological conditions control chemical weathering and carbon dynamics in the large rivers, we investigated hydrochemistry and carbon isotopic compositions of dissolved inorganic carbon (DIC) based on high-frequency sampling in the Wujiang River draining the carbonate area in southwestern China. Concentrations of major dissolved solute do not strictly follow the dilution process with increasing discharge, and biogeochemical processes lead to variability in the concentration-discharge relationships. Temporal variations of dissolved solutes are closely related to weathering characteristics and hydrological conditions in the rainy seasons. The concentrations of dissolved carbon and the carbon isotopic compositions vary with discharge changes, suggesti

SUBMITTER: Zhong J 

PROVIDER: S-EPMC5318914 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature