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Simulating the thermorheological evolution of channel-contained lava: FLOWGO and its implementation in EXCEL

Andrew J. L. Harris, Maéva Rhéty, Lucia Gurioli, Nicolas Villeneuve and Raphaël Paris
Geological Society, London, Special Publications, 426, 313-336, 5 June 2015, https://doi.org/10.1144/SP426.9
Andrew J. L. Harris
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
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  • For correspondence: [email protected]
Maéva Rhéty
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
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Lucia Gurioli
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
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Nicolas Villeneuve
2Laboratoire GéoSciences Réunion, 15 Avenue René Cassin, BP 7151, 97715 Saint Denis messagerie cedex 9, La Réunion, France
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Raphaël Paris
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
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Abstract

FLOWGO is a one-dimensional model that tracks the thermorheological evolution of lava flowing down a channel. The model does not spread the lava but, instead, follows a control volume as it descends a line of steepest descent centred on the channel axis. The model basis is the Jeffreys equation for Newtonian flow, modified for a Bingham fluid, and a series of heat loss equations. Adjustable relationships are used to calculate cooling, crystallization and down-channel increases in viscosity and yield strength, as well as the resultant decrease in velocity. Here we provide a guide that allows FLOWGO to be set up in Excel. In doing so, we show how the model can be executed using a slope profile derived from Google™ Earth. Model simplicity and ease of source-term input from Google™ Earth means that this exercise allows (i) easy access to the model, (ii) quick, global application and (iii) use in a teaching role. Output is tested using measurements made for the 2010 eruption of Piton de la Fournaise (La Réunion Island). The model is also set up for rapid syneruptive hazard assessment at Piton de la Fournaise, as we show using the example of the response to the June 2014 eruption.

  • © 2016 The Author(s). Published by The Geological Society of London. All rights reserved
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Geological Society, London, Special Publications: 426 (1)
Geological Society, London, Special Publications
Volume 426
2016
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Simulating the thermorheological evolution of channel-contained lava: FLOWGO and its implementation in EXCEL

Andrew J. L. Harris, Maéva Rhéty, Lucia Gurioli, Nicolas Villeneuve and Raphaël Paris
Geological Society, London, Special Publications, 426, 313-336, 5 June 2015, https://doi.org/10.1144/SP426.9
Andrew J. L. Harris
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: [email protected]
Maéva Rhéty
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
  • Find this author on Google Scholar
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Lucia Gurioli
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
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  • Find this author on PubMed
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Nicolas Villeneuve
2Laboratoire GéoSciences Réunion, 15 Avenue René Cassin, BP 7151, 97715 Saint Denis messagerie cedex 9, La Réunion, France
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  • Find this author on PubMed
  • Search for this author on this site
Raphaël Paris
1Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–IRD, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France
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Simulating the thermorheological evolution of channel-contained lava: FLOWGO and its implementation in EXCEL

Andrew J. L. Harris, Maéva Rhéty, Lucia Gurioli, Nicolas Villeneuve and Raphaël Paris
Geological Society, London, Special Publications, 426, 313-336, 5 June 2015, https://doi.org/10.1144/SP426.9
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  • Article
    • Abstract
    • FLOWGO: heritage and applications
    • FLOWGO: model structure, underlying physical principles and assumptions
    • Test case: the December 2010 channel-fed flow of Piton de la Fournaise
    • Setting up FLOWGO in Excel
    • Discussion
    • Conclusion
    • References
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