Publications

Publications

  1. Lange, A.M.Z., Fiedler, J.W., Merrifield, M.A., and Guza, R.T. (2024)

    Free Infragravity Waves on the Inner Shelf: Observations and Parameterizations at Two Southern California Beaches

    JGR: Oceans

    • Infragravity (IG) waves on the inner shelf (10–15 m depth) in San Diego, USA are often dominated by refractively trapped free waves.
    • Free IG energies are parameterized as a function of local sea-swell conditions and tide level.
    • Numerically modeled wave runup is only weakly influenced by the shoreward propagating IG waves observed at the offshore boundary.

  2. Lange, A.M.Z., Fiedler, J.W., Merrifield, M.A., and Guza, R.T. (2023)

    UAV-video based estimates of nearshore bathymetry

    Coastal Engineering

    • Wave crests can be obtained from timestacks with the help of a U-Net neural network.
    • Surfzone bathymetry can be well estimated remotely with UAVs ( ~ 0.24m).
    • Crest-tracking surfzone and offshore cBathy estimates give nearshore bathymetries.

  3. Lange, A.M.Z., Fiedler, J.W., Merrifield, M.A., and Guza, R.T. (2022)

    Estimating runup with limited bathymetry

    Coastal Engineering

    • 24 composite bathymetries are evaluated with the SWASH 1D model.
    • Setup and infragravity swash are dependent on offshore bathymetry.
    • A frequency-weighted energy spectra parameterization of the 2% exceedance level of runup performs significantly better than a bulk parameterization.
    • Including both foreshore beach slope and surfzone slope improves the skill of runup parameterizations.

  4. Merrifield, M.A., Johnson, M., Guza, R.T., Fiedler, J.W., Young, A.P., Henderson, C.S., Lange, A.M.Z., O’Reilly, W.C., Ludka, B.C., Okihiro, M., Gallien, T., Pappas, K., Engeman, L., Behrens, J. & Terrill, E. (2021)

    An early warning system for wave-driven coastal flooding at Imperial Beach, CA

    Natural Hazards

Conferences

  1. Lange, A.M.Z., Fiedler, J.W., Merrifield, M.A., and Guza, R.T.

    UAV-video based estimates of nearshore bathymetry

    CIRN Workshop, Duck, NC 2023

  2. Lange, A.M.Z., Fiedler, J.W., Merrifield, M.A., and Guza, R.T.

    Estimating surfzone bathymetry remotely

    Ocean Sciences Meeting 2022

  3. Lange, A.M.Z., Becker, J.M., Merrifield, M.A., Behrens, J., and Terrill, E.

    Relating Offshore Wave Conditions to Incident Waves and Shoreline Water Levels at Ipan, Guam during Extreme Events.

    Ocean Sciences Meeting 2020, San Diego