A new method was developed to calculate the local mean velocity of unsteady
tidal flow from the experimental data using Sontek-ADV and Ultrasonic mete
rs with noisy signals. The method is mainly to analyse a time series of vel
ocity signals in order to obtain a time series of a Moving-Averaged velocit
y. The paper presents the details of the method. The processing shows accep
table results. (C) 2001 Elsevier Science Ltd. All rights reserved.