Abstract
Even though tsunami-caused damages mainly refer to ones from inundations and strong currents, recent observations reveal that tsunami waves had significantly affected morphological features in the nearshore area. Since strong and sometimes catastrophic currents are created by tsunami waves, the harbor area is also vulnerable to the morphological changes from tsunami impacts. In this study, the morphological responses to the tsunami waves are examined through numerical simulations using Xbeach model. As a real-scale implementation, 2011 Tohoku-oki tsunami, one of the most destructive tsunamis in history is attempted with a focus on the localized effects of tsunami waves on sedimentation at the Crescent City Harbor. The tsunami physics are known to be less predictable in the nearshore area because of the complex geometric features and the existence of various types of turbulence sources, it is much important to recreate tsunami current field more accurately for the sediment calculations. To this end, a multi-grids and multi-physics tsunami model is preferred for the better reproduction of current fields by tsunami waves in the nearshore. Results on velocity fields computed by tsunami model show that strong and catastrophic currents with large coherent structures were induced by tsunami waves in the harbor area(Son and Lynett, 2015). Such precalculated wave fields during tsunami events are then input to Xbeach model to simulate sedimentation process in the area of interest. Bathymetric changes predicted by Xbeach model reveal that strong velocity fields which had been successfully generated through the tsunami model resulted severe sedimentation processes of scouring and deposition which is consistent with the observation.
| Original language | English |
|---|---|
| Pages (from-to) | 979-985 |
| Number of pages | 7 |
| Journal | Procedia Engineering |
| Volume | 116 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
| Externally published | Yes |
| Event | 5th International Conference on Asian and Pacific Coasts, APAC 2009 - Singapore, Singapore Duration: 2009 Oct 13 → 2009 Oct 16 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
2HD analysis of morphologic responses to the tsunami impacts using process-based model. / Son, Sang Young; Jung, Tae Hwa.
In: Procedia Engineering, Vol. 116, No. 1, 01.01.2015, p. 979-985.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - 2HD analysis of morphologic responses to the tsunami impacts using process-based model
AU - Son, Sang Young
AU - Jung, Tae Hwa
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Even though tsunami-caused damages mainly refer to ones from inundations and strong currents, recent observations reveal that tsunami waves had significantly affected morphological features in the nearshore area. Since strong and sometimes catastrophic currents are created by tsunami waves, the harbor area is also vulnerable to the morphological changes from tsunami impacts. In this study, the morphological responses to the tsunami waves are examined through numerical simulations using Xbeach model. As a real-scale implementation, 2011 Tohoku-oki tsunami, one of the most destructive tsunamis in history is attempted with a focus on the localized effects of tsunami waves on sedimentation at the Crescent City Harbor. The tsunami physics are known to be less predictable in the nearshore area because of the complex geometric features and the existence of various types of turbulence sources, it is much important to recreate tsunami current field more accurately for the sediment calculations. To this end, a multi-grids and multi-physics tsunami model is preferred for the better reproduction of current fields by tsunami waves in the nearshore. Results on velocity fields computed by tsunami model show that strong and catastrophic currents with large coherent structures were induced by tsunami waves in the harbor area(Son and Lynett, 2015). Such precalculated wave fields during tsunami events are then input to Xbeach model to simulate sedimentation process in the area of interest. Bathymetric changes predicted by Xbeach model reveal that strong velocity fields which had been successfully generated through the tsunami model resulted severe sedimentation processes of scouring and deposition which is consistent with the observation.
AB - Even though tsunami-caused damages mainly refer to ones from inundations and strong currents, recent observations reveal that tsunami waves had significantly affected morphological features in the nearshore area. Since strong and sometimes catastrophic currents are created by tsunami waves, the harbor area is also vulnerable to the morphological changes from tsunami impacts. In this study, the morphological responses to the tsunami waves are examined through numerical simulations using Xbeach model. As a real-scale implementation, 2011 Tohoku-oki tsunami, one of the most destructive tsunamis in history is attempted with a focus on the localized effects of tsunami waves on sedimentation at the Crescent City Harbor. The tsunami physics are known to be less predictable in the nearshore area because of the complex geometric features and the existence of various types of turbulence sources, it is much important to recreate tsunami current field more accurately for the sediment calculations. To this end, a multi-grids and multi-physics tsunami model is preferred for the better reproduction of current fields by tsunami waves in the nearshore. Results on velocity fields computed by tsunami model show that strong and catastrophic currents with large coherent structures were induced by tsunami waves in the harbor area(Son and Lynett, 2015). Such precalculated wave fields during tsunami events are then input to Xbeach model to simulate sedimentation process in the area of interest. Bathymetric changes predicted by Xbeach model reveal that strong velocity fields which had been successfully generated through the tsunami model resulted severe sedimentation processes of scouring and deposition which is consistent with the observation.
UR - http://www.scopus.com/inward/record.url?scp=84941248869&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84941248869&partnerID=8YFLogxK
U2 - 10.1016/j.proeng.2015.08.389
DO - 10.1016/j.proeng.2015.08.389
M3 - Conference article
AN - SCOPUS:84941248869
VL - 116
SP - 979
EP - 985
JO - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
IS - 1
ER -