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Paper Information

Title: 

ESTIMATION OF EXTREME WAVES IN ASALUYEH USING SWAN MODEL

Type: PAPER
Author(s): MOEINI MOHAMMAD HADI,ETEMAD SHAHIDI AMIR,CHEGINI VAHID
 
 
 
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 DESIGN OF COASTAL AND OFFSHORE STRUCTURES REQUIRES ESTIMATION OF THE SIGNIFICANT WAVE HEIGHT CORRESPONDING TO A CERTAIN RETURN PERIOD, OBTAINED BY COLLECTING SHORT-TERM DATA. INSTRUMENTALLY MEASURED, VISUALLY OBSERVED OR NUMERICALLY SIMULATED WAVE DATA CAN BE USED FOR THIS PURPOSE. IN THIS STUDY A THIRD GENERATION NUMERICAL MODEL, I.E. SWAN, WAS EMPLOYED FOR REPRODUCING TIME SERIES OF WAVE DATA IN ASALUYEH IN THE NORTHERN COASTS OF THE PERSIAN GULF. THE SWAN MODEL WAS FORCED WITH DAYYER SYNOPTIC WIND DATA. THE EXTREME VALUE ANALYSIS WAS CONDUCTED BASED ON THE MEASURED AND HINDCASTED WAVE DATA. THE PEAK OVER THRESHOLD METHOD WAS USED FOR DETERMINATION OF EXTREME WAVES.
IT WAS FOUND THAT ALTHOUGH THERE WERE SOME INCONSISTENCIES BETWEEN RECORDED AND SIMULATED DATA MAINLY DUE TO THE QUALITY OF WIND SOURCE INFLUENCED BY THE OROGRAPHY EFFECTS, THE DIFFERENCES BETWEEN DESIGN WAVE HEIGHTS OBTAINED FROM MEASURED AND SIMULATED DATA WERE NOT SIGNIFICANT IN ANY DIRECTION.
THE RESULTS OF THIS STUDY ALSO SHOWED THAT THE WEIBULL DISTRIBUTION IS BETTER COMPARED TO OTHER DISTRIBUTIONS FOR BOTH MEASURED AND SIMULATED DATA IN THIS REGION. THE SHAPE PARAMETER FOR WEIBULL DISTRIBUTION WAS FOUND TO BE 1.6 FOR BOTH MEASURED AND MODELED DATA. IN ADDITION, THE EFFECT OF THRESHOLD VALUE ON THE EXTREME WAVE HEIGHT WAS LESS THAN 10 PERCENT FOR ALL RETURN PERIOD.

 
Keyword(s): PERSIAN GULF, SWAN, THIRD GENERATION, EXTREME WAVE HEIGHT
 
 
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