Application of "shallow-water" numerical models for hazard assessment of volcanic flows: the case of titan2d and Turrialba volcano (Costa Rica)

Revista Geológica de América Central

Charbonnier, Sylvain J²  Ogburn, Sarah³  Palma, José L¹ 

[1] University at Buffalo, Buffalo, USA;University of South Florida, Tampa;University of Concepción, Región del Bíobio, Chile

关键词: /span> Numerical modeling;    Titan2D;    Turrialba volcano;    shallow-water equations;    volcanic hazards;    hazard assessment;    debris avalanche;    block-and-ash flows;   

DOI  :  

学科分类：地质学

来源: Universidad de Costa Rica * Editorial

【 摘 要 】

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.

【 授权许可】

CC BY-NC