Current Velocity Impacts from Interaction of Semidiurnal and Diurnal Tidal Constituents for Tidal Stream Energy in East Flores

Abstract

The combination of the Semidiurnal and Diurnal Tidal Constituents results in a variability of tidal range and current speed through the months of the year. Tidal stream predicted from astronomical harmonic constituents and also tidal stream is a current that its speed can be optimized as renewable energy. Constituent Semidiurnal components have huge impact on the forming of tidal stream phase. Larantuka Strait is one of the highest current velocities in indonesia waters. This study uses the method of calculating the mean least squares analysis, with the approach of the vector of the current component to the tidal harmonic constituent. Tidal velocities exceeds 3 m/s in this area, this value is very potential. The results of current and tide analysis at this area showedstrong interaction. 0.73 at Formzhal value shows mixed tide type, prevailing semidiurnal. Constituent values which dominate in the forming of strong current are M₂ with value of 2.22 m/s, and another semi diurnal contituent, S₂ value at current vector is 1.11 m/s. The linkages between current velocity with tide shows advantage in the production of available maximum power in a day will varies on each tide type. An asymmetric pattern of both tidal elevation and tidal velocity can be observed during each day.