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Flood Susceptibility and Sediment Transport Analysis of Stromboli Island after the 3 July 2019 Paroxysmal Explosion

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  • Omar S. Areu-Rangel

    (Instituto de Ingeniería, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico)

  • Rosanna Bonasia

    (CONACYT-Instituto Politécnico Nacional, ESIA, UZ, Miguel bernard, S/N, Edificio de Posgrado, Mexico City 07738, Mexico)

  • Federico Di Traglia

    (Dipartimento di Scienze della Terra, Università degli Studi di Firenze, 50121 Firenze, Italy)

  • Matteo Del Soldato

    (Dipartimento di Scienze della Terra, Università degli Studi di Firenze, 50121 Firenze, Italy)

  • Nicola Casagli

    (Dipartimento di Scienze della Terra, Università degli Studi di Firenze, 50121 Firenze, Italy)

Abstract

On 3 July 2019, Stromboli volcanic island experienced a paroxysmal explosion that triggered wildfires on vegetated areas in the south, southwestern, and eastern part of the island. This study analyzes the runoff and the transport of sediment originating from rainfall, to verify whether the vegetation loss due to wildfire changed the hydrogeological structure of the affected area and the flooding hazard. A preliminary hydrological study was conducted to analyze the superficial runoff due to rainfall. According to local planning, the hydrogeological study and flood risk assessment were carried out for the return periods corresponding to 50, 100, and 300 years. The flooding levels were calculated using the hydrodynamic module of the IBER software. The IBER sediment transport module was applied in a non-stationary regime for erosion and sedimentation analysis. The results showed that the fire caused an increase of the water discharge rates between 0.06 and 0.16 m 2 /s, for the 50 year return period, in the Ginostra inhabited area. The great differences of the flood levels between pre- and post-eruptive scenarios, for the highest return periods, were recognized. The analysis of sediment transport showed that rains could exert an erosion and re-sedimentation effect that would transport from 0.1 m to more than 1 m of re-mobilized material in the Ginostra area, which could cause inconvenience in the inhabited area of the island.

Suggested Citation

  • Omar S. Areu-Rangel & Rosanna Bonasia & Federico Di Traglia & Matteo Del Soldato & Nicola Casagli, 2020. "Flood Susceptibility and Sediment Transport Analysis of Stromboli Island after the 3 July 2019 Paroxysmal Explosion," Sustainability, MDPI, vol. 12(8), pages 1-18, April.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:8:p:3268-:d:346732
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    References listed on IDEAS

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    1. M. Parise & S. Cannon, 2012. "Wildfire impacts on the processes that generate debris flows in burned watersheds," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 61(1), pages 217-227, March.
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