Fig. 1. Idealized grid bathymetry

clockwise from Shinnecock Inlet.) Dual parallel jetties extend 250 m seaward from the

shoreline. Calculation cells were specified to be 25 m on each side for the wave model giving

fine resolution for the breaking waves. Cell side lengths varied between 25 and 50 m for the

circulation model, with finer resolution near the shore and through the inlet. The Manning

roughness coefficient, specified in the circulation model, varied between 0.028 m/s1/3 in the

offshore region to 0.04 m/s1/3 in the inlet and surf zone.

Fig. 1. Idealized grid bathymetry

Five simulations were conducted in which combinations of tide and wave forcing were

applied (Table 1). For the case of tide forcing only, no coupling with the wave model was

conducted. For the cases with wave forcing only, 1-way coupling was conducted in which

radiation stress gradients were transferred from the wave model to the circulation model and

were held constant throughout the simulation. For cases with both wave and tide forcing, 2-way

coupling was invoked at 3-hr steering intervals.

Table 1. Simulation Properties

Case Number &

Tide

Wave

Height*, m

Period*, s

Direction*, deg

Description

Range, m

1. Tide only

1.0

0.0

0

2. Fair-weather wave only

0.0

1.0

8

30

3. Storm wave only

0.0

3.0

10

30

4. Tide & fair-weather wave

1.0

8

30

5. Tide & storm wave

1.0

3.0

10

30

* Wave properties refer to the significant wave height and peak spectral period specified in 30 m

of water at the seaward STWAVE boundary..

Militello and Kraus

3