Computer simulations of pyroclastic flows from dome collapse

Details Computer simulations of pyroclastic flows from dome collapse Computer simulations of pyroclastic flows from dome collapse

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3677w&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 19, p. 3677-3680

Physics

Geophysics

12

Mathematical Geophysics: Modeling, Mathematical Geophysics: Nonlinear Dynamics, Volcanology: Eruption Mechanisms, Volcanology: Eruption Monitoring

Scientific paper

We present a method of simulating both the avalanche and surge components of pyroclastic flows generated by lava collapsing from a growing Pelean dome. This is used to successfully model the pyroclastic flows generated on 12 May 1996 by the Soufriere Hills volcano, Montserrat. In simulating the avalanche component we use a simple 3-fold parameterization of flow acceleration for which we choose values using an inverse method. The surge component is simulated by a 1D hydraulic balance of sedimentation of clasts and entrainment of air away from the avalanche source. We show how multiple simulations based on uncertainty of the starting conditions and parameters, specifically location and size (mass flux), could be used to map hazard zones.

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