Document Type : Original Research Article
Authors
1
PhD in Marine Physics, Khorramshahr University, Khorramshahr University of Marine Sciences and Technology
2
Associate Professor, Faculty of Engineering & Technology, University of Mazandaran, Pasdaran Street, Babolsar, Iran;
3
Associate Professor, Department of Physical Oceanography, Faculty of Marine Science, University of Mazandaran, Iran
10.22034/ijcoe.2024.341132.0
Abstract
Wind waves are one of the most important phenomena in marine environments that affect inshore and offshore processes. This research aims to investigate the accuracy of empirical and spectral methods in predicting wind wave characteristics in Amir Abad port. For this purpose, empirical methods SMB, SPM, CEM, and JONSWAP were used, and wave characteristics for wind durations of 1 to 12 hours were calculated. Predicted wave heights and wave periods were compared with measured data, and errors in experimental procedures were determined. According to the study, the most appropriate method to predict wave heights is the JONSWAP method, while the CEM method is the most suitable for determining wave periods. The SPM method was found to be inappropriate for determining the wave profile in Amir Abad port. To more completely evaluate methods to predict waves, wave heights of measured data were compared with significant wave height measured by the spectrum of JONSWAP, Pierson-Moskowitz, Mitsuyasu, and ITTC. It was found that two peaks with different frequencies are observed in the spectrum of measured data. Then, the spectrum of the region, regardless of swell peak, was compared with other mentioned spectra. In this comparison, Mitsuyasu was determined to be the most appropriate spectrum, and after calibration, wave parameters Hm0, H1/10, Tz, and Tp were calculated. By comparing the calculated Hs using Multipeak and Mitsuyasu spectrum, it was found that Multipeak spectrum has the minimum error in calculating significant wave height.
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