Multiply-Connected Channel Model of Tides and Tidal Currents in Puget Sound, Washington and a Comparison with Updated Observations

摘要

Tides and tidal transports within Puget Sound have been calculated using a model in which the Sound is represented by 79 channels connected at 43 junctions. Linearized equations of motion were used to determine channel cross-sectionally averaged quantities for the principal tidal constituents (M2, K1, S2, N2, O1, P1, M4). Transport values from the model were subsequently compared to transports calculated from currents measured on four sections across the Sound at both M2 and K1 frequencies. Tidal transports at the M2 frequency match the transports calculated from the data with average difference of less than 3% for amplitude and 4.3 degrees for phase. The model was also used to calculate cross-sectionally averaged tidal currents, tidal prisms, and tidal dissipation rates for the composite tide and for constituents. As an example of those results, the composite tide and the M2 and K1 constituents have tidal prisms of 7.69, 4.74 and 3.73 km(sup 3) and dissipation rates of 733, 528 and 78 MW, respectively.