Record Details

Study of the directional spectrum of ocean waves using array, buoy and radar measurements

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Study of the directional spectrum of ocean waves using array, buoy and radar measurements
 
Creator Fernandes, A.A.
 
Contributor Menon, H.B.
 
Subject cross spectrum analysis
wave simulation
gauge triad
wave data
Borgman’s method
Esteva’s method
Spectral density
CERC
 
Description Phase/time/path difference (PTPD) methods of Esteva [1977] and Borgman [1974] with two modifications, viz., true phase and coherence proposed in this thesis, have for the first time been successfully used for computing wave direction as a function of frequency from actual field measurements at the Coastal Engineering Research Center’s (CERC) Field Research Facility at Duck, North Carolina, USA, using polygonal and linear arrays respectively in case of swell, sea and surf beat as the directional spread is generally unimodal. PTPD methods fail in case of multimodal directional spreads, which can be easily spotted from the large value of the standard deviation of redundant estimates of wave direction. In this thesis it is shown that PTPD methods are adept in describing the propagation of waves generated by distant storms (swell); locally generated wind waves (sea); infra gravity waves (surf beat) locally generated by energetic incident swell; and surf beat of remote origin occurring when low swell energies are present. Results of PTPD methods are consistent with those obtained by the CERC using the Iterative Maximum Likelihood Estimation (IMLE) method.
 
Date 2006-06-15T13:16:26Z
2006-06-15T13:16:26Z
1999
 
Type Thesis
 
Identifier Ph.D. thesis, Goa University, Goa, India; 251pp
http://drs.nio.org/drs/handle/2264/123
 
Language en
 
Format 60708 bytes
882959 bytes
1154541 bytes
342259 bytes
application/pdf
application/pdf
application/pdf
application/pdf