Evaluation of Delft3D Performance in Nearshore Flows

Abstract

The Delft3D modeling system, developed by Delft Hydraulics (www.wldelft.nl) is capable of simulating hydrodynamic processes due to waves, tides, rivers, winds, and coastal currents. It can be used to provide surf prediction for areas with complicated bathymetry where the use of a one-dimensional surf model is inappropriate. Delft3D has many model options and free parameters. The main objective of this investigation is to examine the effects of these selections on the performance of Delft3D. Both Duck94 and NSTS Santa Barbara data were used for evaluating Delft3D performance. Many parameters and options including roller, breaker delay, and breaking dissipation formulations are evaluated. All three bottom friction formulations, i.e., Chezy, White-Colebrook, and Manning, are evaluated and all can produce good longshore current results, if proper empirical bottom friction coefficient is used. The RMS error for longshore current is about 0.2 m/s.

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Document Details

Document Type
Technical Report
Publication Date
Dec 28, 2006
Accession Number
ADA460541

Entities

People

  • James D. Dykes
  • James Kaihatu
  • Richard Allard
  • Y. Larry Hsu

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Agreements
  • Bathymetry
  • Boundaries
  • Coastal Regions
  • Coefficients
  • Depth
  • Military Research
  • Regions
  • Research Facilities
  • Shallow Depth
  • Shallow Water
  • Shores
  • Standards
  • Statistics
  • Two Dimensional
  • Validation
  • Wave Power

Readers

  • Coastal Oceanography
  • Computational Modeling and Simulation