Although land-to-ocean transfer of organic C through the river network has been recognized as an important component of the global C cycle (IPCC – 5AR), it has so far not been represented in ESMs. Here, for the first time, we present the implementation of fluvial dissolved organic carbon (DOC) transport into ORCHIDEE. This implementation extends the soil organic C branch ORCHIDEE-SOM (Bertrand Guenet and colleagues at the LSCE), and includes DOC fluxes from the tree tops to the ground and from soils to the coast, in-stream decomposition of DOC and subsequent CO₂ evasion from the water surface. Moreover, an improved floodplain inundation scheme will be introduced. Preliminary results for the Amazon River basin are presented and compared to literature data. The results allow for the quantification of allochthonous sources to river DOC and CO₂, highlighting the importance of riparian wetlands for the river C dynamics.