CMS-PTM

Case Studies / Sample Problems

The following tutorials may be helpful for learning to use CMS-PTM in SMS:

Noyo Nearshore Sediment Placement Pilot Study

Noyo Harbor and Noyo River are located on the northern California coast. Every year about 30,000-40,000 cy of beach-quality sediment is dredged from the Noyo River Federal Navigation Channel. The USACE San Francisco District (SPN) and the Coastal and Hydraulics Laboratory (CHL), U.S. Army Engineer Research and Development Center are presently collaborating with the Noyo Harbor District and stakeholders in a pilot study to investigate a potential candidate site for nearshore placement of dredged sediment. Upland disposal sites used in the past will soon be exceeded. The pilot study proposes a dispersive nearshore site 3 to 8 miles north of Noyo Bay along the northern California coast (Figure 1).

Figure 1. CMS domain, grid, and bathymetry.

To evaluate the potential impacts of nearshore placement, the CMS and CMS-PTM were applied to simulate sediment transport for combined waves and currents under various ambient conditions and project alternatives. The model results will provide the technical information necessary to evaluate a demonstration site that is economically feasible for the optimum sediment placement location.

CMS-PTM

The CMS calculates water levels, currents and waves through the coupling of a hydrodynamic model, CMS-Flow and a wave spectral model, CMS-Wave.

Figure 2. CMS files.

1. Native Sediment Dataset

1. CMS-PTM requires spatially varying native bed sediment data specified as datasets, including the grain size information of d35, d50, and d90 for each cell, in the CMS-Flow grid.