Efficient Integration of a Storm Surge Model into a Multidisciplinary Agent Based Model Framework
Authored by Juan L Garzon, Celso Ferreira, Robert A Dalrymple, Seth D Guikema
Date Published: 2016
DOI: 10.2112/si75-217.1
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Abstract
Multiple hurricanes have impacted coastal areas of the USA and they
represent one of the most costly natural hazards in the country. In an
effort to comprehend the regional vulnerability and resilience to these
hazards, a multidisciplinary team is developing an novel framework, the
Integrated Hazard, Impact, and Resilience Model (IHIRM). Storm surge
modelling is a key role of this framework and inundation from multiple
scenarios will be estimated by using a hydrodynamic model (ADCIRC) and a
wave model (SWAN). Simulating a large number of storm surge scenarios
requires a considerable computational effort and therefore the
trade-offs between cost and accuracy must be investigated. Initially, model response sensitivity to numerical mesh resolution was performed
for Hurricanes Irene (2011) and Sandy (2012). Results from the moderate
and high resolution meshes provided similar values, while the increase
of computational time was substantial. Secondly, we explored the
difference between the maximum water levels simulated with ADCIRC and
with the coupled version ADCIRC+SWAN (i.e., contribution of wave setup
during the peak of the storm). The contribution of wave setup to the
overall water levels was less than 0.1 m inside the Chesapeake Bay and
0.5 m outside the Bay. Additionally, the computational time
significantly increased for the coupled version simulation. Hence, neglecting the contribution of wave setup in areas like the upper
Chesapeake Bay would not have a significant impact on the surge
estimates and a considerable amount of resources would be saved.
Conversely, wave setup must be considered at open coast areas.
Tags
Waves
Wind