A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana
Southern Louisiana is characterized by low-lying topography and an extensive network of sounds, bays, marshes, lakes, rivers, and inlets that permit widespread inundation during hurricanes. A basin- to channel-scale implementation of the Advanced Circulation (ADCIRC) unstructured grid hydrodynamic m...
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ftcarolinadr:cdr.lib.unc.edu:9880w1745 2023-06-11T04:14:51+02:00 A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana Westerink, J.J. Luettich, R.A. Feyen, J.C. Atkinson, J.H. Dawson, C. Roberts, H.J. Powell, M.D. Dunion, J.P. Kubatko, E.J. Pourtaheri, H. Institute of Marine Sciences 2008 https://doi.org/10.17615/dq0t-xa11 https://cdr.lib.unc.edu/downloads/bv73c8720?file=thumbnail https://cdr.lib.unc.edu/downloads/bv73c8720 English eng https://doi.org/10.17615/dq0t-xa11 https://cdr.lib.unc.edu/downloads/bv73c8720?file=thumbnail https://cdr.lib.unc.edu/downloads/bv73c8720 Monthly Weather Review, 136(3) Topography Algorithms Hurricane storm surge model Tides Unstructured grid hydrodynamic model Advanced circulation Hurricane effects Wind effects Hydrodynamics Storms Boundary layers Article 2008 ftcarolinadr https://doi.org/10.17615/dq0t-xa11 2023-05-28T21:02:35Z Southern Louisiana is characterized by low-lying topography and an extensive network of sounds, bays, marshes, lakes, rivers, and inlets that permit widespread inundation during hurricanes. A basin- to channel-scale implementation of the Advanced Circulation (ADCIRC) unstructured grid hydrodynamic model has been developed that accurately simulates hurricane storm surge, tides, and river flow in this complex region. This is accomplished by defining a domain and computational resolution appropriate for the relevant processes, specifying realistic boundary conditions, and implementing accurate, robust, and highly parallel unstructured grid numerical algorithms. The model domain incorporates the western North Atlantic, the Gulf of Mexico, and the Caribbean Sea so that interactions between basins and the shelf are explicitly modeled and the boundary condition specification of tidal and hurricane processes can be readily defined at the deep water open boundary. The unstructured grid enables highly refined resolution of the complex overland region for modeling localized scales of flow while minimizing computational cost. Kinematic data assimilative or validated dynamic-modeled wind fields provide the hurricane wind and pressure field forcing. Wind fields are modified to incorporate directional boundary layer changes due to overland increases in surface roughness, reduction in effective land roughness due to inundation, and sheltering due to forested canopies. Validation of the model is achieved through hindcasts of Hurricanes Betsy and Andrew. A model skill assessment indicates that the computed peak storm surge height has a mean absolute error of 0.30 m. Article in Journal/Newspaper North Atlantic Carolina Digital Repository (UNC - University of North Carolina) |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
Topography Algorithms Hurricane storm surge model Tides Unstructured grid hydrodynamic model Advanced circulation Hurricane effects Wind effects Hydrodynamics Storms Boundary layers |
spellingShingle |
Topography Algorithms Hurricane storm surge model Tides Unstructured grid hydrodynamic model Advanced circulation Hurricane effects Wind effects Hydrodynamics Storms Boundary layers Westerink, J.J. Luettich, R.A. Feyen, J.C. Atkinson, J.H. Dawson, C. Roberts, H.J. Powell, M.D. Dunion, J.P. Kubatko, E.J. Pourtaheri, H. A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana |
topic_facet |
Topography Algorithms Hurricane storm surge model Tides Unstructured grid hydrodynamic model Advanced circulation Hurricane effects Wind effects Hydrodynamics Storms Boundary layers |
description |
Southern Louisiana is characterized by low-lying topography and an extensive network of sounds, bays, marshes, lakes, rivers, and inlets that permit widespread inundation during hurricanes. A basin- to channel-scale implementation of the Advanced Circulation (ADCIRC) unstructured grid hydrodynamic model has been developed that accurately simulates hurricane storm surge, tides, and river flow in this complex region. This is accomplished by defining a domain and computational resolution appropriate for the relevant processes, specifying realistic boundary conditions, and implementing accurate, robust, and highly parallel unstructured grid numerical algorithms. The model domain incorporates the western North Atlantic, the Gulf of Mexico, and the Caribbean Sea so that interactions between basins and the shelf are explicitly modeled and the boundary condition specification of tidal and hurricane processes can be readily defined at the deep water open boundary. The unstructured grid enables highly refined resolution of the complex overland region for modeling localized scales of flow while minimizing computational cost. Kinematic data assimilative or validated dynamic-modeled wind fields provide the hurricane wind and pressure field forcing. Wind fields are modified to incorporate directional boundary layer changes due to overland increases in surface roughness, reduction in effective land roughness due to inundation, and sheltering due to forested canopies. Validation of the model is achieved through hindcasts of Hurricanes Betsy and Andrew. A model skill assessment indicates that the computed peak storm surge height has a mean absolute error of 0.30 m. |
author2 |
Institute of Marine Sciences |
format |
Article in Journal/Newspaper |
author |
Westerink, J.J. Luettich, R.A. Feyen, J.C. Atkinson, J.H. Dawson, C. Roberts, H.J. Powell, M.D. Dunion, J.P. Kubatko, E.J. Pourtaheri, H. |
author_facet |
Westerink, J.J. Luettich, R.A. Feyen, J.C. Atkinson, J.H. Dawson, C. Roberts, H.J. Powell, M.D. Dunion, J.P. Kubatko, E.J. Pourtaheri, H. |
author_sort |
Westerink, J.J. |
title |
A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana |
title_short |
A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana |
title_full |
A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana |
title_fullStr |
A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana |
title_full_unstemmed |
A basin- to channel-scale unstructured grid hurricane storm surge model applied to southern Louisiana |
title_sort |
basin- to channel-scale unstructured grid hurricane storm surge model applied to southern louisiana |
publishDate |
2008 |
url |
https://doi.org/10.17615/dq0t-xa11 https://cdr.lib.unc.edu/downloads/bv73c8720?file=thumbnail https://cdr.lib.unc.edu/downloads/bv73c8720 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Monthly Weather Review, 136(3) |
op_relation |
https://doi.org/10.17615/dq0t-xa11 https://cdr.lib.unc.edu/downloads/bv73c8720?file=thumbnail https://cdr.lib.unc.edu/downloads/bv73c8720 |
op_doi |
https://doi.org/10.17615/dq0t-xa11 |
_version_ |
1768371176780857344 |