numerical modeling, Titan2D, Turrialba volcano, shallow-water equations, volcanic hazards, hazard assessment, debris avalanche, block-and-ash flows
Digital Object Identifier (DOI)
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 block-and-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 Ti-tan2D resistance terms by using empirical relationships provides a good method for reducing model input uncertainties.
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Citation / Publisher Attribution
Revista Geológica de América Central, v. 52, p. 107-128
Scholar Commons Citation
Charbonnier, Sylvain J.; Palma, José L.; and Ogburn, Sarah, "Application of "Shallow-Water" Numerical Models for Hazard Assessment of Volcanic Flows: the Case of Titan2d and Turrialba Volcano (Costa Rica)" (2015). School of Geosciences Faculty and Staff Publications. 600.