COMPAS: A coastal unstructured ocean model using Voronoi meshes

There is a growing trend towards unstructured mesh modelling for coastal zones. These meshes are generally coastline following with a resolution function, typically, of distance from coast and/or bathymetry weighted. The variable resolution allows for very fine-scale structure at the areas of interest and expanding out to coarse resolution allowing for a single direct nesting in larger scale global models. However, generating high quality meshes is a non-trivial task, often requiring several iterations to balance the desired resolution and run-time ratios. In this poster, I will introduce our unstructured mesh hydrodynamic model COMPAS (Coastal Ocean Marine Prediction Across Scales), within EMS (Environmental Modelling Suite), which operates on the dual (voronoi) of the triangulation, outline its inline mesh generation using JIGSAW and relocatable capabilities. This allows users to deploy models very quickly with only a minimal set of inputs, the package handles the automated bootstrapping of the full parameter file. COMPAS also includes a mass-conserving transport model, allowing for greatly reduced simulation times when coupled with ecological ad sediment processes, and particle tracking.