A computer model for volcanic ash fallout and assessment of subsequent hazard
作者： G. Macedonio , A. Costa , A. Longo
DOI: 10.1016/J.CAGEO.2005.01.013
关键词: Advection 、 Settling 、 Wind speed 、 Geology 、 Mode (statistics) 、 Volcanic ash 、 Turbulent diffusion 、 Wind profile power law 、 Mechanics 、 Meteorology 、 Mass distribution
摘要: hazmap is a fortran code for the solution of equations diffusion, transport and sedimentation small particles, in order to model dispersion ash generated by convective column. The was developed simplifying advection-diffusion-sedimentation equation volcanic atmosphere from three two dimensions using semi-analytical computational method greatly reduce required computer time memory. can be used either simulate mass distribution deposit if wind profile given (''deposit mode''), or define probability accumulation on ground statistical set profiles provided (''probability mode''). needs definition physical system (spatial point sources, total erupted mass, settling velocity distribution, profile, atmospheric turbulent diffusion coefficients), grid. output values are computed regular grid, suitable further analysis.
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