Use of the PTM with CMS Quadtree Grids
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
Pagination or Media Count:
This Coastal and Hydraulics Engineering Technical Note CHETN describes procedures to set up a particle tracking simulation through coupling the Coastal Modeling System CMS with a quadtree grid and Version 2.1 of the Particle Tracking Model PTM in the Surface-water Modeling System SMS. A CMSPTM application is presented to demonstrate the recent changes in the SMS interface of the PTM. The CMS, developed by the Coastal Inlets Research Program CIRP, is an integrated wave, current, sediment transport, and morphology change model for coastal and inlet applications Sanchez et al. 2011 Lin et al. 2008. The Particle Tracking Model PTM was developed jointly by CIRP and the Dredging Operations and Engineering Research DOER program as a tool to compute the fate and pathways of sediments and other waterborne particulates in coastal engineering and dredging operations MacDonald et al. 2006. Coupling of the CMS with the PTM is implemented in the SMS Demirbilek et al. 2008 Aquaveo 2010 Li et al. 2011. Recently, the CMS model has been extended by introducing a quadtree grid solution scheme Wu et al. 2010, a local grid refinement that can be used to better resolve nearshore hydrodynamic processes. The quadtree approach uses successive splitting of neighboring cells into four sub-cells as often as required. This produces non-uniform cells in parts of modeling domain e.g., cell size is not constant. All cells are numbered in sequence and pointers are used to determine the connectivity with neighboring cells. An example of a typical quadtree grid with five different cell sizes is shown in Figure 1. Figures 2 and 3 show two grids generated for Humboldt Bay, CA.
- Hydrology, Limnology and Potamology
- Computer Programming and Software