Document Type

Article

Department/Program

Virginia Institute of Marine Science

Publication Date

2018

Journal

Geoscientific Model Development

Volume

11

Issue

5

First Page

1849

Last Page

1871

Abstract

We describe and demonstrate algorithms for treating cohesive and mixed sediment that have been added to the Regional Ocean Modeling System (ROMS version 3.6), as implemented in the Coupled Ocean-Atmosphere-Wave- Sediment Transport Modeling System (COAWST Subversion repository revision 1234). These include the following: floc dynamics (aggregation and disaggregation in the water column); changes in floc characteristics in the seabed; erosion and deposition of cohesive and mixed (combination of cohesive and non-cohesive) sediment; and biodiffusive mixing of bed sediment. These routines supplement existing noncohesive sediment modules, thereby increasing our ability to model fine-grained and mixed-sediment environments. Additionally, we describe changes to the sediment bed layering scheme that improve the fidelity of the modeled stratigraphic record. Finally, we provide examples of these modules implemented in idealized test cases and a realistic application.

DOI

10.5194/gmd-11-1849-2018

Keywords

Turbulence-Induced Flocculation; Fine-Grained Sediments; Sand-Mud Mixtures; Settling Velocity; Continental-Shelf; Acoustic Scattering; Bed; Erosion; Dynamics; Bioturbation

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Share

COinS