Accession Number:

ADA526943

Title:

An Investigation of Dynamical Processes Influencing Sediment Transport and Morphological Change in Skagit Bay using an Unstructured Grid Coastal Ocean Model

Descriptive Note:

Research rept.

Corporate Author:

MASSACHUSETTS UNIV DARTMOUTH SCHOOL FOR MARINE SCIENCE AND TECHNOLOGY

Personal Author(s):

Report Date:

2009-01-01

Pagination or Media Count:

9.0

Abstract:

In this work, we will employ a high-resolution coupled hydrodynamic-sediment model to examine the relative importance of the principal mechanisms controlling the morphodynamics of Skagit Bay. Using the measurements from the extensive observation program supported through the tidal flats DRI, we will examine the capability of a state of the art coastal ocean model, and determine what future extensions may be necessary for continued discovery in this field. Through extensive grid refinement efforts and available high-fidelity bathymetry, a better understanding of the mesh resolution required to resolve the critical processes will be gained. This will guide future application of this class of model. OBJECTIVES In this project, we will configure an advanced coupled hydrodynamic-sediment model for simulation of the circulation and sediment transport in Skagit Bay. The model will resolve the range of required scales from the open boundary in Puget Sound 50 km to the channel networks on the flats 10-100 m. The coupled model will be validated using available measurements to determine the capabilities and needs of such a system for this class of application. Grid convergence studies will be performed to determine the necessary mesh resolution required to resolve the dominant processes. We will employ the calibrated coupled model to evaluate the relative importance and influence of observed external forcing fluvial, tidal, wind, wind-wave and surface heating on sediment dynamics and morphological change of the inter-tidal region of Skagit Bay over a range of time scales from tidal to seasonal.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE