SAMPLING BIAS IN THE ESTIMATION OF SIGNIFICANT WAVE HEIGHT EXTREME VALUES

Proceedings of the International Conference on Coastal Engineering

Alessandro¹  Fabio Dentale²  Leonardo Damiani²  Angela Di Leo²  Ferdinando Reale²  Felice D'³  Eugenio Pugliese Carratelli³ 

[1] DICATECh, Technical University of Bari;MEDUS - Maritime Engineering Division University of Salerno;University of Salento

关键词: extreme waves;    sampling bias;    wave measurement;   

DOI  :  10.9753/icce.v35.waves.33

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

It has been shown before, and it is intuitively evident, that in a Significant Wave Height (SWH) time series, the longer the sampling interval, the lower is the number of events which are above a given threshold value. As a consequence, the use of data with a low time resolution (such as a 3 h sampling, for instance) causes a considerable undervaluation of the extreme SWH values for a given return time RT. In this paper an example of such a bias is provided, and a method is suggested to estimate it on a regional basis. Results may help to improve the use of historical wave meters data which were often collected with a low time resolution, and may also provide a tool to improve the application of Numerical Meteo-Wave models to the evaluation of extremes.

【 授权许可】

CC BY