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Paper Information

Title: 

LONG TERM WAVES IN KUWAITI TERRITORIAL WATERS-EFFECT OF THRESHOLD VALUE

Type: PAPER
Author(s): NEELAMANI S.*
 
 *
 
Name of Seminar: INTERNATIONAL CONFERENCE ON COASTS, PORTS AND MARINE STRUCTURES (ICOPMAS) PORTS & MARITIME ORGANIZATION
Type of Seminar:  CONFERENCE
Sponsor:  PORTS AND MARITIME ORGANIZATION
Date:  2008Volume 8
 
 
Abstract: 

THE EFFECT OF VARYING THE THRESHOLD VALUE ON THE PREDICTED EXTREME SIGNIFICANT WAVE HEIGHT AT 19 DIFFERENT LOCATIONS IN THE KUWAIT TERRITORIAL WATER IS INVESTIGATED. THRESHOLD VALUE IS VARIED FROM 0.75 M TO 3.0 M WITH INCREMENT OF 0.25 M. GUMBEL AND WEIBULL EXTREME VALUE DISTRIBUTIONS ARE USED FOR THE EXTREME WAVE ANALYSIS AND WEIBULL DISTRIBUTION IS FOUND TO BE BETTER FOR ALL THE LOCATIONS. THE VALUE OF SHAPE PARAMETER IS VARIED FROM 0.8 TO 1.3 WITH INCREMENT OF 0.05 AND THE BEST SHAPE PARAMETER IS SELECTED (BASED ON THE HIGHEST COEFFICIENT OF REGRESSION VALUE) FOR OBTAINING THE LOCATION PARAMETER AND SCALE PARAMETER OF THE WEIBULL DISTRIBUTION. IT IS FOUND THAT THERE IS NO DEFINITE TREND IN THE PREDICTED EXTREME SIGNIFICANT WAVE HEIGHT, WHEN THE THRESHOLD VALUE IS VARIED FROM 0.75 M TO 3.0 M. FOR SOME LOCATIONS, THE PREDICTED EXTREME SIGNIFICANT WAVE HEIGHT IS FOUND TO REDUCE WITH INCREASED THRESHOLD WAVE HEIGHT VALUE AND FOR SOME OTHER LOCATIONS, THE PREDICTED EXTREME WAVE HEIGHT VALUE OSCILLATES WHEN THE THRESHOLD VALUE IS CHANGED FROM 0.75 TO 3.0 M. IT IS FOUND THAT THE DIFFERENCE BETWEEN THE MAXIMUM AND MINIMUM PREDICTED 100 YEAR RETURN PERIOD SIGNIFICANT WAVE HEIGHT VALUE IS MORE THAN 0.5 M FOR SOME LOCATIONS IN KUWAITI TERRITORIAL WATERS AND FOR FEW OTHER LOCATIONS, THE DIFFERENCE IS EVEN LESS THAN 0.25 M. IT IS HENCE UP TO THE USER/OWNER OF THE PROJECT TO SELECT A DESIGN VALUE IN BETWEEN THE MINIMUM AND MAXIMUM PREDICTED SIGNIFICANT WAVE HEIGHT FOR DIFFERENT RETURN PERIODS BY KEEPING THE RISK AND PROJECT COST IN MIND.

 
Keyword(s): EXTREME WAVES, KUWAITI TERRITORIAL WATERS, THRESHOLD WAVE HEIGHT, GUMBEL AND WEIBULL DISTRIBUTION, SIGNIFICANT WAVE HEIGHT, HINDCASTED WAVE DATA
 
 
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