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Multi-model validation of currents in the Chesapeake Bay region in June 2010 / P. Chu in Marine geodesy, vol 35 n° 4 (October - December 2012)  

Public [article]  inMarine geodesy > vol 35 n° 4 (October - December 2012) . - pp 399 - 428 Titre : Multi-model validation of currents in the Chesapeake Bay region in June 2010 Type de document : Article/Communication Auteurs : P. Chu, Auteur ; G. Jacobs, Auteur ; K. Cambazoglu, Auteur ; R. Linzell, Auteur Année de publication : 2012 Article en page(s) : pp 399 - 428 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bathymétrie [Termes IGN] bathymétrie acoustique [Termes IGN] Chesapeake (baie de) [Termes IGN] courant marin [Termes IGN] Etats-Unis [Termes IGN] image NOAA [Termes IGN] littoral [Termes IGN] marégraphe [Termes IGN] modèle hydrographique [Termes IGN] niveau de l'eau [Termes IGN] niveau moyen des mers Résumé : (Auteur) In this paper, we discuss the validation of water level and current predictions from three coastal hydrodynamic models and document the resource and operational requirements for each modeling system. The ADvanced CIRCulation Model (ADCIRC), the Navy Coastal Ocean Model (NCOM), and Delft3D have been configured and validated for the Chesapeake Bay region during a Navy exercise. Water level predictions are compared with a NOAA/NOS water level gauge at the Chesapeake Bay Bridge Tunnel location while current predictions are validated with Acoustic Doppler Profiler (ADP) measurement records at three locations in the lower Chesapeake Bay. Statistical metrics such as correlation coefficient and root mean square error (RMSE) are computed. Both the vertically-integrated currents and currents at varying water depths are compared as well. The model-data comparisons for surface elevation indicate all three models agreed well with water level gauge data. The two-dimensional version of ADCIRC, ADCIRC2D, and NCOM yield better statistics, in terms of correlation and RMSE, than Delft3D. For vertically-integrated currents, ADCIRC2D has the smallest RMSE at Thimble Shoal and Naval Station locations while NCOM has the smallest RMSE at Cape Henry. For the horizontal currents over the water column, the fully three-dimensional, baroclinic ADCIRC model, ADCIRC3D, and NCOM both showed better agreement with the ADP measurements. Numéro de notice : A2012-668 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/01490419.2012.709477 Date de publication en ligne : 04/12/2012 En ligne : https://doi.org/10.1080/01490419.2012.709477 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32114 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
230-2012041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Tsunami inundation modeling and mapping using ALTM- and CARTOSAT-derived coastal topographic data / S. Nayak in Marine geodesy, vol 35 n° 4 (October - December 2012)  

Public [article]  inMarine geodesy > vol 35 n° 4 (October - December 2012) . - pp 429 - 440 Titre : Tsunami inundation modeling and mapping using ALTM- and CARTOSAT-derived coastal topographic data Type de document : Article/Communication Auteurs : S. Nayak, Auteur ; T. Usha, Auteur ; R. Kankara, Auteur ; N. Reddy, Auteur Année de publication : 2012 Article en page(s) : pp 429 - 440 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes IGN] cartographie des risques [Termes IGN] données de terrain [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] données topographiques [Termes IGN] image Cartosat-1 [Termes IGN] Inde [Termes IGN] inondation [Termes IGN] littoral [Termes IGN] modèle numérique de surface [Termes IGN] tsunami Résumé : (Auteur) Coastal topography is the principal variable that affects the movement of the tsunami wave on land. Therefore, land surface elevation data are critical to a tsunami model for computing extent of inundation. Elevation data from India's remote sensing satellite CARTOSAT-1 are available for the entire Indian coastline, while elevation data collected using Airborne Laser Terrain Mapper (ALTM) are only available for selected sections of the coastline. This study was carried out to evaluate the suitability of CARTOSAT-1 and ALTM elevation data sets in the tsunami inundation modeling. Two areas of the coastal Tamil Nadu that were severely affected during the December 2004 tsunami and surveyed extensively for mapping the extent of inundation were selected as the study areas. Elevation data sets from ALTM, CARTOSAT-1 and field measurement collected using Real-time Kinematic GPS (RTK-GPS) were compared for these areas. The accuracy of ALTM and CARTOSAT-1 data, the significance of interpolation methods and data used on model outputs were studied. The analysis clearly revealed that the elevation accuracy of CARTOSAT-1 data (+/-2m) was much lower than ALTM data (+/-0.6m). However, it was found that despite the differing elevation accuracy, both ALTM and CARTOSAT-1 can be used to produce tsunami inundation maps for open coasts with an accuracy of 185 m (2 grid cells) at 75% and 50% confidence level, respectively. Numéro de notice : A2012-669 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/01490419.2011.646606 Date de publication en ligne : 04/12/2012 En ligne : https://doi.org/10.1080/01490419.2011.646606 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32115 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
230-2012041	RAB	Revue	Centre de documentation	En réserve L003	Disponible