Figure 5.
Complete computational grid for Guam study (To convert feet to
meters, multiply by 0.3048)
Table 3
Storm Surge Grid Parameters
Parameter
Value
400,173,057 m2 (4,307,322,182 ft2)
Maximum element area
570 m2 (6,132 ft2)
Minimum element area
Ratio of maximum to minimum element areas
702,433
Number of elements
15,301
Number of nodes
8,410
Center longitude and latitude
145 E, 14 N
Circular grid radius
4 deg
The finest grid resolution is around the study area. Reefs, shallow areas, and
embayments are finely resolved in and near the study area so that the hydro-
dynamics can be accurately calculated in these regions. Details of the grid
around Guam are shown in Figure 6. Figure 7 shows detail of Apra Harbor and
the study area. Because of the fine grid resolution in reef areas coupled with the
extreme hydrodynamic conditions (strong currents and rapid change in water
level) associated with the storms, a time-step of 5 sec was required for model
runs.
15
Chapter 3
Modeling Approach
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