CSDMS 2011 annual meeting poster Alfredo Aretxabaleta

Presentation provided during CSDMS annual meeting 2011

Stratigraphic Modeling in ROMS

Chris Sherwood, US Geological Survey Woods Hole Massachusetts, USA. csherwood@usgs.gov
Alfredo Aretxabaleta, US Geological Survey Woods Hole Massachusetts, USA. aaretxabaleta@usgs.gov


The stratigraphic record is the product of sedimentary processes acting over time. The Regional Ocean Modeling System (ROMS) includes algorithms for the processes of erosion, deposition, and mixing of both non-cohesive (sandy) and cohesive (muddy) sediment, and routines capable of tracking the evolution of event-scale stratigraphy with layers as fine as a few grain diameters thick. Thus ROMS allows users to relate process with product over time scales ranging from a few seconds to years, over vertical space scales of 0.1 mm to meters, and over horizontal space scales of meters to hundreds of kilometers. ROMS requires users to specify the number of bed layers to be tracked at compile time. This improves model efficiency on parallel systems, but complicates the task of tracking stratigraphic evolution. In addition to the number of layers, users can control the minimum and maximum layer thickness and the initial stratigraphy. The effect of these choices and the success of the stratigraphy routines is demonstrated with models of idealized estuaries, deltas, and continental shelves.

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