Document Type

Article

Publication Date

2015

Keywords

numerical modeling, Titan2D, Turrialba volcano, shallow-water equations, volcanic hazards, hazard assessment, debris avalanche, block-and-ash flows

Digital Object Identifier (DOI)

http://dx.doi.org/10.15517/rgac.v0i52.19021

Abstract

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.

Rights Information

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Revista Geológica de América Central, v. 52, p. 107-128

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