|Click on the image to see the animation.
Simulations of tidal currents and salt transport in San Francisco bay are shown in these computer graphics animations. The "Tidal, Residual and Inter-tidal Mudflat" (TRIM) model is a depth-averaged tidal hydrodynamic model which solves the depth-averaged shallow-water equations. The governing equations are solved by a semi-implicit finite-difference method. The TRIM model was developed jointly by Ralph T. Cheng of the USGS and Vincenzo Casulli of Trento University, Trento, Italy. For technical details, consult the following references: Casulli, V. 1990, Semi-implicit Finite Difference Methods for the Two- Dimensional Shallow Water Equations, J. of Computational Physics, Vol. 86, No. 1, p. 56-74. Cheng, R.T., Casulli, V., and J. W. Gartner, 1993, Tidal, Residual, Intertidal Mudflat (TRIM) Model and its Applications to San Francisco Bay, Estuarine, Coastal and Shelf Science, Vol. 36, p. 235-280.