Propagación de la constituyente M2 de la marea en la Bahía de La Paz, B.C.S., México, mediante un modelo bidimensional hidrodinámico numérico

Abstract

The propagation of the M2 constituent of the tide, at La Paz Bay, was simulated in this article by mean of a numerical, barotropic, vertically integrated model. The partial differential equations were integrated in centered finite differences in space and advanced in time. The equations were: the bidimensional momentum equations and the continuity equation. The bathymetry is the constant matrix of the problem and the parameters used were the coefficient of friction with the bottom, the horizontal coefficient of turbulent viscosity, the parameter of Coriolis and the amplitudes and phases of the harmonics of the tide as open boundary conditions. The calibration of the model was based on field measurements of variations of level and velocities of the currents. The results agree, la general, withthe data. The model run in real time and its output for a typical period of the M2 semidiurnal component lo: the surface variation of the free surface of the bay, the bidimensional vectorial distribution of transport, the matrix of maximum elevations, the vectorial distribution of residual transport and the lags of the phase of the high tide with respect to the open boundary to the Gulf of California