Emplacement of pyroclastic flows during the 1998–1999 eruption of Volcán de Colima, México

Saucedo, R.; Macías, José Luis; Bursik, Marcus; Mora, Juan Carlos; Gavilanes, Juan Carlos; Cortés, Abel

doi:10.1016/s0377-0273(02)00241-x

Cited by 82 publications

(49 citation statements)

References 37 publications

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“…Similar channel-levee 11 morphologies have been observed associated with small volume pyroclastic density 12 currents resulting from either dome or column collapse in the subaerial environment 13 (e.g. Rodriguez-Elizarraras et al, 1991;Saucedo et al, 2004;Lube et al, 2007). Downstream from the channel-levee facies, deposited at a break in slope from ~11° to 24 7°, is the 3.5 km long pyroclastic ridge.…”

Section: Discussion and Interpretationsmentioning

confidence: 69%

Submarine pyroclastic deposits formed during the 20th May 2006 dome collapse of the Soufrière Hills Volcano, Montserrat

et al. 2011

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Section: Discussion and Interpretationsmentioning

confidence: 69%

Submarine pyroclastic deposits formed during the 20th May 2006 dome collapse of the Soufrière Hills Volcano, Montserrat

et al. 2011

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“…Rock avalanches are dry because their extensive fragmentation during motion generates new intergranular spaces that cannot be filled by water during their relatively short travel times (Hungr et al, 2014). Blockand-ash flows are dry because they are due to the collapse of volcanic domes (Nairn and Self, 1978;Saucedo et al, 2002) or the explosive fragmentation of volcanic plugs (Hall et al, 2015) where domes and plugs are too hot for liquid water to be present.…”

Section: Introductionmentioning

confidence: 99%

Combined effects of grain size, flow volume and channel width on geophysical flow mobility: three-dimensional discrete element modeling of dry and dense flows of angular rock fragments

Cagnoli

Piersanti

2017

Solid Earth

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Abstract. We have carried out new three-dimensional numerical simulations by using a discrete element method (DEM) to study the mobility of dry granular flows of angular rock fragments. These simulations are relevant for geophysical flows such as rock avalanches and pyroclastic flows. The model is validated by previous laboratory experiments. We confirm that (1) the finer the grain size, the larger the mobility of the center of mass of granular flows; (2) the smaller the flow volume, the larger the mobility of the center of mass of granular flows and (3) the wider the channel, the larger the mobility of the center of mass of granular flows. The grain size effect is due to the fact that finer grain size flows dissipate intrinsically less energy. This volume effect is the opposite of that experienced by the flow fronts. The original contribution of this paper consists of providing a comparison of the mobility of granular flows in six channels with a different cross section each. This results in a new scaling parameter χ that has the product of grain size and the cubic root of flow volume as the numerator and the product of channel width and flow length as the denominator. The linear correlation between the reciprocal of mobility and parameter χ is statistically highly significant. Parameter χ confirms that the mobility of the center of mass of granular flows is an increasing function of the ratio of the number of fragments per unit of flow mass to the total number of fragments in the flow. These are two characteristic numbers of particles whose effect on mobility is scale invariant.

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“…Voight (1978), Lucchitta (1978, 1979), Crandell et al (1984, Francis et al (1985), Siebert et al (1987), McEwen & Malin (1989), Stoopes & Sheridan (1992), Calder et al (1999 and Saucedo et al (2002). DCPFs, dome-collapse pyroclastic flows; OBPFs, overbank pyroclastic flows; FCPFs, fountain collapse pyroclastic flows; Derived Flows, surge derived flows.…”

Section: Model Equations and Numerical Solutionmentioning

confidence: 99%

Aplicación de modelos numéricos de "aguas someras" para el análisis de peligros de flujos volcánicos: El caso de Titan2D y volcán Turrialba (Costa Rica)

Charbonnier

Palma

Ogburn

2015

Rev. Geol. Amér. Central

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This paper introduces Titan2D, a depth averaged model of an incompressible Coulomb continuum for "shallow water" granular flows. Titan2D has been used successfully at many volcanoes to predict inundation by blockand-ash flows and debris avalanches. It can be run as a stand-alone program or through Vhub, a cyber-infrastructure platform. Practical considerations of choosing appropriate user inputs and the basics of running the model are discussed herein. Both synthetic and natural terrain examples are presented, including simulations of a block-and-ash flow generated from the gravitational collapse of a synthetic dome at Turrialba volcano (Costa Rica). These results suggest that the model should be limited to simulate cases of dense volcanic granular flows, like those produced by gravity-driven dome collapse events, but cannot be used to simulate dilute pyroclastic density currents. Finally, estimation of the Titan2D resistance terms by using empirical relationships provides a good method for reducing model input uncertainties.

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Emplacement of pyroclastic flows during the 1998–1999 eruption of Volcán de Colima, México

Cited by 82 publications

References 37 publications

Submarine pyroclastic deposits formed during the 20th May 2006 dome collapse of the Soufrière Hills Volcano, Montserrat

Submarine pyroclastic deposits formed during the 20th May 2006 dome collapse of the Soufrière Hills Volcano, Montserrat

Combined effects of grain size, flow volume and channel width on geophysical flow mobility: three-dimensional discrete element modeling of dry and dense flows of angular rock fragments

Aplicación de modelos numéricos de "aguas someras" para el análisis de peligros de flujos volcánicos: El caso de Titan2D y volcán Turrialba (Costa Rica)

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