Articles | Volume 12, issue 4
Nat. Hazards Earth Syst. Sci., 12, 1229–1233, 2012
https://doi.org/10.5194/nhess-12-1229-2012
Nat. Hazards Earth Syst. Sci., 12, 1229–1233, 2012
https://doi.org/10.5194/nhess-12-1229-2012

Brief communication 27 Apr 2012

Brief communication | 27 Apr 2012

Brief Communication "Rain effect on the load of tephra deposits"

G. Macedonio1 and A. Costa1,2 G. Macedonio and A. Costa
  • 1Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Napoli, Italy
  • 2Environmental Systems Science Center, University of Reading, Reading, UK

Abstract. Accumulation of tephra fallout produced during explosive eruptions can cause roof collapses in areas near the volcano, when the weight of the deposit exceeds some threshold value that depends on the quality of buildings. The additional loading of water that remains trapped in the tephra deposits due to rainfall can contribute to increasing the loading of the deposits on the roofs. Here we propose a simple approach to estimate an upper bound for the contribution of rain to the load of pyroclastic deposits that is useful for hazard assessment purposes. As case study we present an application of the method in the area of Naples, Italy, for a reference eruption from Vesuvius volcano.

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