Evaluating
a down-scaled, coupled wave-surge modeling system in an operational
environment
Jakob
Maljaars
EMC 2:00 pm November 24 in Room 2552
Abstract:
As part of the development of the Nearshore Wave Prediction System
(NWPS) a hindcast study was conducted for a hurricane event in the
Hawaii region. The existing two-way coupling between the ADCIRC-model
and the SWAN-model was employed in order to model the two-way
wave-current interaction. Implementation issues and results of the
hindcast study are discussed during this presentation.
Results show a good agreement between simulated and measured tidal
constituents. Simulated tidal constituents were also in very good
agreement with the large scale ESTOFS Pacific model data. However, in
the down-scaled ADCIRC+SWAN-model a clear wave induced set-up is
observed around landfall of the hurricane which is neither observed in
the ESTOFS data nor in the ‘standalone’ ADCIRC simulations for the
Hawaii region. It turns out that the wave influence on the surge level
is strongly location dependent and sensitive to the used meteorological
forcing. Therefore, a sensitivity test was performed using different
grid resolutions and the quality of different meteorological models
(GFS, NAM, HWRF) was assessed. With the lessons learned a
simple operational environment was built around the coupled
ADCIRC+SWAN-model for the Hawaii region, ready for implementation in
the NWPS.