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Biogeochemical modeling (water column and sediment)

Modeling efforts have been directed towards the application of the model to the estimation of biogases atmospheric fluxes, with special emphasis on nitrogenous compounds (NH3, N2O). Estimates of N2O production are derived from the nitrification processes in the water column. Concerning the flux estimates, it has been found that the water/air exchange coefficient has to take into account both the wind stress and the periodically varying, current induced turbulence.
A diagenetic model has also been developed, which reproduces major trends in biogeochemical cycling in sediment and related sediment-water exchange processes along the whole estuarine gradient. It includes the processes involved in organic matter mineralization and related element cycling (oxygen, nitrogen, manganese, iron, and sulfate) and the two major biogases produced in estuaries (carbon dioxide and methane) are explicitly incorporated. The model may serve as a framework for implementing production, consumption and release processes of other biogases within the sediment.

Reported by

Université de Liège
Sart Tilman
4000 Liège
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