Skip to Main Content
Book Chapter

Simulating the area covered by lava flows using the DOWNFLOW code

By
Simone Tarquini
Simone Tarquini
Department of Geological and Mining Engineering and Sciences, Michigan Technological University, Houghton, MI 49931, USA
Search for other works by this author on:
Massimiliano Favalli
Massimiliano Favalli
Department of Geological and Mining Engineering and Sciences, Michigan Technological University, Houghton, MI 49931, USA
Search for other works by this author on:
Published:
January 01, 2016

Abstract

DOWNFLOW is a probabilistic code for the simulation of the area covered by lava flows. This code has been used extensively for several basaltic volcanoes in the last decade, and a review of some applications is presented. DOWNFLOW is based on the simple principle that a lava flow tends to follow the steepest descent path downhill from the vent. DOWNFLOW computes the area possibly inundated by lava flows by deriving a number, N, of steepest descent paths, each path being calculated over a randomly perturbed topography. The perturbation is applied at each point of the topography, and ranges within the interval ±Δh. N and Δh are the two basic parameters of the code. The expected flow length is constrained by statistical weighting based on the past activity of the volcano. The strength of the code is that: (i) only limited volcanological knowledge is necessary to apply the code at a given volcano; (ii) there are only two (easily tunable) input parameters; and (iii) computational requirements are very low. However, DOWNFLOW does not provide the progression of the lava emplacement over time. The use of DOWNFLOW is ideal when a large number of simulations are necessary: for example, to compile maps for hazard and risk-assessment purposes.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

Geological Society, London, Special Publications

Detecting, Modelling and Responding to Effusive Eruptions

A. J. L. Harris
A. J. L. Harris
Université Blaise Pascal, France
Search for other works by this author on:
T. De Groeve
T. De Groeve
Joint Research Centre of the European Commission, Italy
Search for other works by this author on:
F. Garel
F. Garel
Université de Montpellier, France
Search for other works by this author on:
S. A. Carn
S. A. Carn
Michigan Technological University, USA
Search for other works by this author on:
Geological Society of London
Volume
426
ISBN electronic:
9781862399587
Publication date:
January 01, 2016

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

Related Book Content
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal