An empirical model to predict methane production in inland water sediment from particular organic matter supply and reactivity

The highest CH4 production rates can be found in anoxic inland water surface sediments however no model quantifies following fresh particular organic matter (POM) deposition on sediments. This limits our capability of modeling emissions from waters to the atmosphere. To generate such a model, we quantified how POM supply rate and reactivity control sediment, by amending sediment at different frequencies with quantities aquatic terrestrial POM. From modeled production, derived parameters related kinetics extent production. We show that well predicted quality (i.e., C/N ratio) quantity supplied an sediment. In particular, within range sedimentation systems, increases linearly phytoplankton-derived terrestrially A high frequency addition, which is common situation natural resulted higher peaks rates. suggests relationships earlier incubation experiments added only once, may result underestimation Our results quantitatively couple flux, are therefore useful for further development mechanistic models emission.