Bárcenas-Gascón, P. (Patricia)

Castro, M.J.

Díaz-del-Río-Español, V. (Víctor)

Fernández-Salas, L.M. (Luis Miguel)

González-Vida, J.M.

Macías, J.

Vázquez-Garrido, J.T. (Juan Tomás)

English

Bárcenas-Gascón, Patricia

Vázquez, Juan Tomás

Fernández-Salas, Luis Miguel

González-Vida, José Manuel

Castro-Díaz, Manuel Jesús

Díaz-del-Río-Español, Víctor

Digital.CSIC

HySEA model for submarine landslide generated tsunamis. The Alboraní MMS case

Vázquez, J.T. (Juan Tomás)

González-Vida, J.M. (José Manuel)

Castro-Díaz, M.J. (Manuel Jesús)

Repositorio Institucional Digital del IEO

See	discussions,	stats,	and	author	profiles	for	this	publication	at:	https://www.researchgate.net/publication/261696766HySEA	model	for	submarine	landslide	generated	tsunamis.	The	Alboraní	MMS	caseConference	Paper	·	April	2014CITATIONS0READS887	authors,	including:Some	of	the	authors	of	this	publication	are	also	working	on	these	related	projects:Seamounts	of	southern	Iberia:	Tectonics	and	Sedimentation.	Project	MONTERA	View	projectSediment	transport	in	the	continental	shelf	of	eastern	Andalucia.	Multiscale	observation,	modeling	and	numerical	simulation	(TESELA)	View	projectJuan-Tomas	VazquezInstituto	Español	de	Oceanografia233	PUBLICATIONS			1,852	CITATIONS			SEE	PROFILEV.	Díaz-del-RíoInstituto	Español	de	Oceanografia134	PUBLICATIONS			2,180	CITATIONS			SEE	PROFILEAvailable	from:	Jorge	MaciasRetrieved	on:	03	November	2016Alboran  Sea Figure 2 P. Bárcenas1, J. Macías1, J. T. Vázquez2, L.M. Fernández-Salas3, J.M. González-Vida1, M.J. Castro1 and V. Díaz del Río2 1. Departamento de Análisis Matemático, Facultad de Ciencias. Universidad de Málaga. Campus de Teatinos, s/n. 29080, Málaga, Spain. E-mail: pbarcenas@uma.es 2. Instituto Español de Oceanografía. Centro Oceanográfico de Cádiz, Puerto Pesquero, Muelle de Levante, s/n, 11006 Cádiz, Spain 3. Instituto Español de Oceanografía. Puerto Pesquero s/n, 29640 Fuengirola. Málaga, Spain  . The model considered can also be used as prediction tool for the simulation of potential lanslide generated tsunamis. Monitoring of critical areas where landslides are more probable and modelling their consequences so that appropiate mitigation strategies can be designed are areas of key scientific and socioeconomic interest. ACKNOWLEDGEMENTS This research has been partially supported by the Junta de Andalucía  research project TESELA (P11-RNM7069) and the Spanish Government search projects HySEA2 (MTM2009-11923) and MONTERA (CTM2009-14157-C02). The Spanish Secretaría General de Pesca (Ministerio de Agricultura, Alimentación y Medio Ambiente) provided the bathymetric multibeam data. The multi-GPU computations were performed at the Laboratory of Numerical Methods (University of Malaga). BACKGROUND  and AIMS  HySEA model for submarine landslide generated tsunamis. The Alboraní MMS case RESULTS and DISCUSSION The$numerical$model$HySEA$simulates$the$submarine$landslide$triggering$the$tsunami$and$the$water$mass$evolu:on,$wave$propaga:on$and$the$ﬁnal$penetra:on$of$the$tsunami$waves$into$the$coast,$reproducing$ﬁrst$and$subsequent$tsunami$wave$impacts$by$means$of$a$single$coupled$numerical$model.$The$numerical$model$allows$to$analyze$the$inﬂuence$of$basin$$morphology$on$the$propaga:on$features$of$the$tsunami,$as$its$shape$and$propaga:on$paCerns,$speed$or$wave$amplitude$and,$ﬁnally,$its$impact$on$the$coast$of$southern$Iberia$and$northern$Africa.$Seamounts$located$on$this$basin$are$a$key$factor$to$control$the$tsunami$waves. . This$ work$ deals$ with$ the$ mathema:cal$model ing$ and$ numerica l$ h indcast$simula:on$ of$ an$ hypothesized$ ancient$submarine$ landslide$ occurring$ in$ the$Alboran$ Sea$ Basin$ (Fig.$ 1)$ and$ the$associated$ generated$ tsunami.$ Seaﬂoor$features$related$to$former$mass$movement$systems$ (MMS)$ (Fig.$ 2)$ have$ been$iden:ﬁed$ by$ the$ interpreta:on$ of$mul:beam$ bathymetry$ data$ and$ high$ to$very$high$resolu:on$seismic$proﬁles.$$Figure 1. Physiographic Map  of the Alboran Sea Basin plotted on a hillshade model. A compilation of multibeam bathymetry (40 x 40 m) has been used for the construction of this model and has been plotted on a general hillshade model based on ETOPO bathymetry (1000 x 1000 m). On land a MTD model has been used based on the 1 x 1 les available from the 2000 Shuttle Radar Topography Mission, the resolution is about 90 metres. BS: Baraza slide. SAB: South Alboran Basin. The$possible$tsunami$originated$by$one$of$the$MMS$has$been$numerically$simulated.$This$system,$located$on$the$southern$Alboran$ Ridge$ slope$ (Fig.$ 1$ and$ 2),$ is$ currently$ been$ reworked$ by$ turbidite$ processes,$ forming$ a$ submarine$ canyon$sedimentary$fan$system,$which$is$known$as$the$AlMBoraní$System$(Fig.3)$.$Figure 2. Digital Terrain Model of the Alboran Ridge northern segment  based in a compilation of multibeam bathymetry and location of main Mass  Movement Systems (MMS) Figure 3. Morphological features of the Al-Boran MMS. Figure 4. Al-Boran MMS: (A) Actual multibeam bathymetric 3D model of the Al-Boran MMS. (B) Hypothetical 3D palaeo-bathymetric model of the previous scenario. (C) Location map. Figure 5. Sketch of the two-layer Savage-Hutter submarine landslide numerical model. Figure 6. (A) Bathymetry given by the model after the avalanche. (B) Actual submarine fan bathymetry. (C) Location on the Southern ank of theAlboran Ridge. METHODOLOGY Extension$ of$ the$ ﬂooded$ area$ and$ runup$ heights$ are$ direct$outputs$of$ the$ $numerical$ simula:on.$The$numerical$ treatment$of$ wet/dry$ fronts$ allows$ to$ eﬃciently$ qua:fy$ inunda:on$ and$runup$ height$ with$ no$ need$ of$ imposing$ any$ kind$ of$ coastal$boundary$condi:ons$Figure 7. A-C Initial stages of the numerical simulation in t=60 s (A) and t=90 (B) in the complete domain, and in t=120 s (C). Sea surface elevation time series at: (D) location P1 (in red a zoom from t=10 min.) and (E) location P5. D E Figure 8. Time evolution of the generated tsunami wave after: (A) 6 min and (B) 10min 20 s. D E F Figure 9. A-C: Tsunami wave arrival to the Southern Iberian coast at diferent  locations. (A) Arrival to the eastern coast (Adra-P6), t=22 min. (B) Arrival to Torre del Mar (P7), t = 32 min. (C) Arrival to Malaga and its Bay (P8), t=38 min. D-F: Sea surface elevation time series at locations: (A) Adra (P6); (B) Malaga Bay (P8), and (C) Fuengirola (P9). Figure 10. A. Maximal heigth reached by the tsunami wave at each point of the computational domain and B. Isolines showing the arrival times of the tsunami wave. AB

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HySEA model for submarine landslide generated tsunamis. The Alboraní MMS case

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