Dynamics of hazardous volcanic flows

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doi: 10.1098/rsta.2000.0610
Authors:Woods, Andrew W.
Author Affiliations:Primary:
University of Bristol, Centre for Environmental and Geophysical Flows, Bristol, United Kingdom
Volume Title:causes and consequences of eruptions of andesite volcanoes; papers of a discussion meeting
Volume Authors:Francis, Peter, editor; Neuberg, Jürgen; Sparks, R. Stephen J.
Source:Philosophical Transactions - Royal Society. Mathematical, Physical and Engineering Sciences, 358(1770), p.1705-1724; Discussion meeting on The causes and consequences of eruptions of andesite volcanoes, United Kingdom, Oct. 6-7, 1999, edited by Peter Francis, Jürgen Neuberg and R. Stephen J. Sparks. Publisher: Royal Society of London, London, United Kingdom. ISSN: 1364-503X
Publication Date:2000
Note:In English. 26 refs.; illus.
Summary:In this paper, some of the processes involved in the generation and propagation of hazardous volcanic flows are described. The paper focuses on the high-speed dilute suspension flows that develop following (i) the explosive collapse and decompression of a lava dome; and (ii) the collapse of an ash-laden fountain erupting from a volcanic vent. Using the model, we calculate the approximate vertical distribution of pressure in the flow, and show how this and the flow force evolve as the flow advances from the vent. The effects of topography and sedimentation on the intensity and run-out of such flows are described. Where possible, we draw on field examples of the different phenomena, and we review some analogue laboratory experiments that provide support for the modelling approach.
Sections:Petrology
Subsections:Volcanology
Subjects:Ash flows; Dynamics; Experimental studies; Explosive eruptions; Geologic hazards; Laboratory studies; Lava domes; Lava flows; Mathematical methods; Mathematical models; Volcanoes
Abstract Numbers:00M/4400
Record ID:2000069383
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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