represented in the model. The y-axis is typically aligned with the bottom
contours. Wave angles are defined in a mathematical sense, measured
counterclockwise from the x-axis.
Lateral boundaries in the model can be specified as land or water by
specifying the cell depths as positive (water) or negative (land). Note that
specifying land around the entire grid will give different results than if the lateral
boundaries are water. Land boundaries reduce wave growth near the boundary
because they "block" propagation from landward directions. If the boundaries
are specified as water, a zero-gradient type of boundary is applied that allows
energy, consistent with neighboring cells, to propagate into or out of the domain
along the lateral boundary.
rows
Offshore
Shoreline
J = NJ
wave angle convention
c
45 deg
o
l
u
0 deg
m
n
y
-45
J=1
I = NI
I=1
x
Figure 3. Schematic of STWAVE grid
13
Chapter 2 Governing Equations and Numerical Discretization
Previous Page
