Abstract
This paper presents a conceptual framework for a sediment diagenesis model that was developed as an add-on module to the hydrodynamic and water quality model CE-QUAL-W2. The module was designed for oil sand pit lakes, but has been developed such that it is applicable to other waterbodies, particularly those with subaqueously placed mine waste or organic-rich sediments. The module includes important physical and chemical processes such as the following: tailing consolidation coupled with lake bed deepening and pore-water release, biogenic gas production (build-up and release of methane, hydrogen sulfide and ammonia), bubble release through the water column, unconsolidated sediment resuspension during bubble ebullition, dynamic oxygen consumption at the sediment-water interface and in the water column from bubbles, and salt rejection during ice formation.
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