Nearshore Airborne Lidar Observations

Abstract

Hwang et al. (1999a and 1999b) uses standard FFT procedures to estimate deep water 2-dimensional wavenumber spectra from lidar images. The characteristic wavelength analyzed is O(100m), homogeneity scale is O(10km) and wave evolution scale is O(100km). Knowledge of the local bathymetry allows, via the linear dispersion relation, is needed for retrieving frequency-directional spectrum. The classical Fourier transform approach (FT) fails in the nearshore region due to the strong spatial inhomogeneities of the wavefield, generated by lower order wave-bathymetry and quadratic wave-wave interaction. Shoaling waves evolve much faster than deep-water waves, over O(1km) scales (Elgar and Guza, 1985).

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Document Details

Document Type
Technical Report
Publication Date
Feb 17, 2000
Accession Number
ADA373699

Entities

People

  • Alexandru Sheremet

Organizations

  • Scripps Institution of Oceanography

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bathymetry
  • Data Analysis
  • Deep Water
  • Differential Equations
  • Directional
  • Dispersion Relations
  • Equations
  • Fluids
  • Frequency
  • Observation
  • Ocean Waves
  • Spectra
  • Two Dimensional
  • Water
  • Water Waves
  • Wavelet Transforms
  • Waves

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Coastal Oceanography
  • Military History