Abstract
Methods for estimating directional energy spectra of surface water waves from acoustic Doppler current profiler (ADCP) data are presented in cases of (1) waves on arbitrary, horizontal mean flows and (2) waves on a two-layer, density stratified fluid with finite water depth. An existing perturbation expansion method is employed up to second order to compensate for the effect of arbitrary mean velocity profiles. Equations describing characteristics of random waves on a two-layer fluid are utilized to allow determination of directional surface and interfacial wave spectra. Wave-induced velocities based on model wave spectra were synthesized for simulating ADCP measurement schemes to verify the new method, and to investigate misestimation when the two-layer condition was neglected. Errors are typically smaller than other measurement uncertainties but depend greatly on the relationship among wave characteristics, interface depth, relative densities, and measurement locations.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.