Leonardi, A. orcid.org/0000-0002-7900-8376, Pirulli, M., Barbero, M. et al. (5 more authors) (2021) Impact of debris flows on filter barriers : analysis based on site monitoring data. Environmental and Engineering Geoscience, 27 (2). pp. 195-212. ISSN 1078-7275
Abstract
Debris flows are one of the most complex and devastating natural phenomena, and they affect mountainous areas throughout the world. Structural measures are currently adopted to mitigate the related hazard in urbanized areas. However, their design requires an estimate of the impact force, which is an open issue. The numerous formulae proposed in the literature require the assignment of empirical coefficients and an evaluation of the kinematic characteristics of the incoming flow. Both are generally not known a priori. In this article, we present the Grand Valey torrent site (Italian Alps). A monitoring system made up of strain gauges was installed on a filter barrier at the site, allowing the evaluation of impact forces. The system provides pivotal information for calibrating impact formulae. Two debris flows occurred during the monitoring period. We present the interpretation of videos, impact measurements, and the results of numerical analyses. The combined analysis allows a back calculation of the events in terms of forces, flow depth, and velocity. Thus, we investigate the applicability of the impact formulae suggested in the literature and of the recommended empirical coefficients. The results highlight that hydrostatic effects dominated the impact during the first event, while hydrodynamic effects prevailed in the second one.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Association of Environmental and Engineering Geologists. This is an author-produced version of a paper subsequently published in Environmental and Engineering Geoscience. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | debris flows; structural mitigation measures; impact forces; site monitoring system; numerical modelling |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 01 Dec 2021 07:40 |
Last Modified: | 02 Dec 2021 09:13 |
Status: | Published |
Publisher: | GeoScienceWorld |
Refereed: | Yes |
Identification Number: | 10.2113/eeg-d-20-00013 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:181055 |