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November, 2020November 30, 2020

Wetting and Drying Test on Tidal Flats

To validate the wetting and drying scheme implemented in the GOM, we compared our model results with the analytical solution developed by Carrier and Greenspan (1958). To compare with the analytical solution, a rectangular basin with a linearly sloping bottom is considered. The length and the width of the basin are set to 55 km and 100 m respectively. The water depth at the origin, x = 0 m, is set to 50 m, and the bottom slope is 1:1000; thus, the initial land and water interface is at x = 50 km (Figure 1).

The computational domain is divided by 550 x 1 quadrilateral elements (dx, dy = 100 m). A periodic tide with an amplitude 0.2 m and a period of 1 hr is applied at the open boundary, at x = 0 m. Numerical simulation results show that the analytical and the numerical solutions are in good agreement, showing that the wetting and drying process implemented in GOM works well:

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