Spatial and temporal hydrochemical variations of the spring-fed travertine-depositing stream in the Huanglong Ravine, Sichuan, SW China

Research reveals that travertine deposition in Huanglong Ravine is driven by intense CO2 degassing, which reduces pCO2 and specific conductivity while increasing pH and saturation index downstream. However, this process is disrupted by snowmelt dilution and additional CO2 inputs from downstream springs. The study also found that travertine deposition accelerates during daylight hours due to higher water temperatures and algal photosynthesis. Additionally, increased phosphate levels linked to tourism activities may inhibit calcite precipitation and contribute to discoloration, posing a threat to the site's unique landscape. To achieve these insights, the researchers employed automatic hydrochemical logging, in situ titration, and laboratory analysis, while also noting the impact of the 2008 Wenchuan earthquake on the spring's chemistry.

Wang, H., Liu, Z., Zhang, J., Sun, H., An, D., Fu, R., & Wang, X. (2010). Spatial and temporal hydrochemical variations of the spring-fed travertine-depositing stream in the Huanglong Ravine, Sichuan, SW China. Acta Carsologica, 39(2). https://doi.org/10.3986/ac.v39i2.97