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Digital elevation model uncertainty and hazard analysis using a geophysical flow model

Córdoba, Gustavo Y Sheridan, Michael Y Pitman, Bruce Y Stefanescu, Ramona Y Bursik, Marcus (2012) Digital elevation model uncertainty and hazard analysis using a geophysical flow model. 13645021 Proceedings Of The Royal Society A-Mathematical Physical And Engineering Sciences, 468. pp. 1543-1563. ISSN 13645021

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This paper describes a new methodology to quantify the variation in the output of a computational fluid dynamics model for block and ash flows, when the digital elevation model (DEM) of the terrain and other inputs are given as a range of possible values with a prescribed uncertainty. Integrating these variations in the possible flows as a function of input uncertainties provides well-defined hazard probabilities at specific locations, i.e. a hazard map. Earlier work provided a methodology for assessing hazards based on variations in flow initiation and friction parameters. This paper extends this approach to include the effect of terrain error and uncertainty. The results are based on potential flows at Mammoth Mountain, CA, and Galeras Volcano, Colombia. The analysis establishes the soundness of the approach and the effect of including the uncertainty in DEMs in the construction of probabilistic hazard maps.

Tipo de Elemento: Artículo
Asunto: Q Ciencias > QE Geology
Division: Facultad de Ingeniería > Programa de Ingeniería Civil > Productividad
Depósito de Usuario: Dr Gustavo Cordoba
Fecha Deposito: 06 Mar 2018 22:01
Ultima Modificación: 06 Mar 2018 22:01

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