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Directional characteristics of shallow water waves along southwestern Bay of Bengal

DRS at CSIR-National Institute of Oceanography

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Title Directional characteristics of shallow water waves along southwestern Bay of Bengal
 
Creator Johnson, G.
SanilKumar, V.
Anoop, T.R.
Joseph, J.
 
Subject OCEANOGRAPHY AND LIMNOLOGY
OCEANOGRAPHY AND LIMNOLOGY
METEOROLOGY AND CLIMATOLOGY
GEOLOGY AND GEOPHYSICS
OCEANOGRAPHY AND LIMNOLOGY
 
Description The aim of the present research is to investigate the directional characteristics of waves along the southwestern Bay of Bengal based on the measured data during 2010 at 14 m water depth. Diurnal, monthly and annual variation of reflected waves is studied for waves within a frequency range of 0.03–0.125 Hz to eliminate the influence of local wave growth processes. High values of directional width during the annual cycle over the southwestern Bay of Bengal is associated with the swell reflection from the coast during southwest monsoon season (June–September) and intrusion of moderate easterly winds propagating from Gulf of Thailand over the narrow land mass of Thailand and Myanmar. The reflected wave energy is maximum (14%) during the southwest monsoon due to the presence of long period and intermediate period waves and minimum (9%) during the northeast monsoon season (October–January). During fair-weather period (February–May), 10% of the total energy is propagated towards offshore. We also analyzed the relationship between directional and non-directional wave parameters using continuous wavelet transform and wavelet coherence analysis (WCA). WCA shown that reflection coefficient and total energy is directly/inversely proportional to the swells, when signal of period approximately less/greater than one day is observed.
 
Date 2016-07-11T12:39:37Z
2016-07-11T12:39:37Z
2016
 
Type Journal Article
 
Identifier Ocean Engineering, vol.121; 2016; 546-558
no
http://drs.nio.org/drs/handle/2264/4996
 
Language en
 
Relation Ocean_Eng_121_546.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2016] Elsevier
 
Publisher Elsevier