<p>Although extensive research has been conducted on tufa formation mechanisms across various global environments, particularly focusing on the physicochemical mechanisms underlying hydrodynamic deposition, the specific deposition processes of tufa in unique regional or environmental settings, such as waterfalls, remain underexplored. Based on the identification of white granular carbonate sediments attached to tree bark in the Nuorilang Waterfall environment in Jiuzhaigou, China, this study designates these sediments as bark tufa. The deposition process is examined as a reflection of the physicochemical mechanisms underlying tufa formation. A genetic model for bark tufa was developed through field surveys, assumptions about the deposition process, and petrographic analysis. Laboratory simulation experiments were then conducted to examine the controlling roles of waterfall effects, such as aeration, low-pressure, and jet-flow effects, as well as evaporation in bark tufa deposition. The study demonstrates that in low-calcium ion environments (such as waterfalls), specific physicochemical processes can induce carbonate precipitation. Results further highlight the roles of the thin layer effect and evaporation in the tufa deposition process. This study enhances the understanding of the physicochemical processes involved in tufa deposition and provides a theoretical foundation for the development and conservation of waterfall tufa landscapes in global Natural Heritage Sites.</p>