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Estimation of wind speed and wave height during cyclones

DRS at CSIR-National Institute of Oceanography

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Title Estimation of wind speed and wave height during cyclones
 
Creator SanilKumar, V.
Mandal, S.
AshokKumar, K.
 
Subject wind speed
wave height
cyclones
wind fields
ocean waves
wind data
wave data
design
 
Description Wave and wind characteristics based on the cyclones, in the vicinity of the Nagapattinam coastline (east coast of India) were estimated. In all, 11 cyclones have crossed near the study region during 1960-1996. For the four severe cyclones, the isobaric charts were collected at three hourly intervals from the India Meteorological Department. The storm variables such as central pressure, radius of maximum wind, speed of forward motion and direction of storm movement were extracted and the method based on standard Hydromet pressure profile, were used for the hindcast of storm wind fields. For all the cyclones the maximum significant wave height within the storm and its associated spectral peak period was estimated using the Young's model considering the moving wind field and the results are compared with the hurricane wave prediction techniques provided in the shore protection manual published by the US Army Corps of Engineers in 1984. The study shows that the estimated wind speed and the data reported by ships were comparable. Empirical expressions relating wind speed, wave height and wave period to storm parameters were derived. The design wave height for different return periods was obtained by fitting a two-parameter Weibull distribution to the estimated significant wave heights. The design wave height was 9.39 m for 1 in 100 year return period for a direct hit of cyclone.
 
Date 2008-07-18T05:39:02Z
2008-07-18T05:39:02Z
2003
 
Type Journal Article
 
Identifier Ocean engineering, Vol.30; 2239-2253p.
http://drs.nio.org/drs/handle/2264/1235
 
Language en
 
Rights Copyright [2003]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
 
Publisher Elsevier