Application of the Holocene Peat accumulation Model to the James Bay peatlands

Peatlands are complex systems and the mechanisms controlling these systems are still poorly understood. Empirical data allow the resolution of some questioning but are restricted by costs, accessibility, seasons and weather. Several models have been developed in order to capture the systemic and dynamics of peatlands. Different types of models can be used for that purpose: empirical, semi-empirical and mechanical models. They are all based on empirical knowledge and their aim is to reproduce peatland development, dynamics and reactions mathematically. The “Holocene Peat Model” presented here is a work in progress. The objective is to simulate peat profiles and carbon accumulation profiles for a typical peatland in North America. It encompasses dynamic modeling of vegetation, accumulation and decomposition. The evaluation method suggested here is based on collected data from a bog located in the Eastmain river basin and a fen located in the eastern part of the La Grande river basin. The disparity between the two sites gives an insight into the model sensitivity to hydrologic regime or pH.

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