Revealing carbon balance characteristics in a water conveyance-type lake and differences in carbon sources through its connective hydrological channels

Most of the world’s lakes are fed through water conveyance, namely, that continuously receive and discharge water. However, complex hydrological processes such make it difficult to determine their specific biogeochemical carbon (C) cycles. Poyang Lake was selected for this study, whose capacity conveyance is largest in China. We used both main trace elements lake as stable isotopes surface its tributaries C sources reveal C–water coupling relationship. has a high river–lake connectivity, results show undergoes rapid renewal. The effect large amount dissolved inorganic (DIC) cannot be converted deposited into sediment, resulting an annual DIC input output 1.3 × 109 kg year?1. atmospheric deposition (27%), carbonate weathering (27%) silicate (26%). Furthermore, characteristics Basin change under conditions. Results from study provide reference investigation conveyance-type effects associated with