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http://dx.doi.org/10.9765/KSCOE.2020.32.5.296

A Study on Calibration of Underestimated Wave Heights Measured by Wave and Tide Gauge (WTG)  

Jeong, Weon Mu (Maritime ICT R&D Center, Korea Institute of Ocean Science and Technology)
Chang, Yeon S. (Maritime ICT R&D Center, Korea Institute of Ocean Science and Technology)
Oh, Sang-Ho (Coastal Development and Ocean Energy Research Center, Korea Institute of Ocean Science and Technology)
Baek, Won Dae (Maritime ICT R&D Center, Korea Institute of Ocean Science and Technology)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.32, no.5, 2020 , pp. 296-306 More about this Journal
Abstract
It has been reported that the wave heights measured by Wave and Tide gauges (WTG) have been underestimated, and thus it is important to improve its measuring accuracy for enhancing estimation of harbor tranquility. In this study, the significant wave heights from WTG were calibrated using measured data from AWAC and Waverider buoys moored at the same four locations with the WTG. It was observed that the product of significant wave height and peak wave period, HT, was not underestimated but linearly proportional between the measurements by two instruments. This linearity was applied to develop 3rd order polynomial functions that best represented the relationship between HT and significant wave heights measured by WTG. These functions were then applied to calibrate the WTG significant wave heights that were lower than 0.7 m, the critical value established for the low waves in this study. The results showed that the linearity between the AWAC (or Waverider buoy) and calibrated wave heights were improved, and the magnitude of underestimated WTG wave heights were increased to be more realistic. The results of this study are expected to be effectively applied for other data sets obtained by WTG only, to increase the observation accuracy of WTG and to improve the estimation of harbor tranquility.
Keywords
Wave and Tide Gauge (WTG); wave height underestimation; wave height calibration; harbor tranquility; wave measurement;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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