Comments:
The computational grid, named pr6 for the Piscataqua River is created using linear equilateral triangles fitted to the shoreline boundary. There are 3417 nodes and 6043 elements. The bathymetric depth contour reveals a center channel running north to south.

M2 tidal forcing is specified as a Dirichlet elevation boundary conditions across the southern inlet boundary at the bottom and across the northern inlet boundary at the top . The amplitude is 1.00m at the bottom boundary and 0.93m at the top boundary. The simulation was started with fluid at rest and was terminated after six M2 tidal period (74.52hrs). The simulation setup is given below. All the simulation parameters are summarized in Table below.

Comments:
Time history of the total fluid volume and the cumulative transport across four selected transects as shown in pr6 show the system establishes a dynamic equilibrium rapidly, and mass conservation is thereafter maintained throughout the simulation after the initial tidal period. The maximum normal velocity across the transects increases then decreases as one moves northward with maximum level across the narrowest transect, while the normal transport across the same transects decreases to maintain mass conservation. It is noticed that asymmetry exists between flood and ebb.

Residual transport:

Comments:

Comments:
The above transient solutions are numerically well-behaved and appear to describe the realistic dynamics of the tidal flooding and dewatering process in this complex domain.