Variational Data Assimilation for Near-Shore Waves Using the Extended Boussinesq Equations

Abstract

This report describes a variational approach for assimilation of single-point, in-situ observations of surface elevation and velocity into the extended Boussinesq model of Wei et al. (1996). The mathematical framework for assimilation is presented, along with applications of the procedure for two cases: monochromatic waves and broad-spectrum irregular waves. Overall the performance of the approach for monochromatic waves is quite good; while for irregular waves, some of the short-wave detail, especially for waves propagating in the along-shore direction, is missed. As part of the development work, an existing parallel Boussinesq model code was improved through addition of run-up, wave-breaking and bottom-friction models, and a directional wavemaker was implemented.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2005
Accession Number
ADA441232

Entities

People

  • David T. Walker

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Assimilation
  • Beaches
  • Boundaries
  • Coastal Regions
  • Directional
  • Elevation
  • Equations
  • Frequency
  • Friction
  • Information Operations
  • Information Systems
  • Military Operations
  • Observation
  • Regions
  • Research Facilities
  • Shores
  • Spectra

Readers

  • Coastal Oceanography
  • Computational Modeling and Simulation