Geotechnical Properties of Two Pyroclastic Deposits Involved in Catastrophic Flowslides for Implementation in Early Warning Systems
| Autor: | Emilia Damiano, Martina De Cristofaro, N. Netti, Lucio Olivares |
|---|---|
| Přispěvatelé: | Olivares, Lucio, Damiano, Emilia, Netti, Nadia, de Cristofaro, Martina, Lucio, Olivare, Emilia, Damiano, De Cristofaro, Martina |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
socioeconomic framework
Warning system lcsh:QE1-996.5 0211 other engineering and technologies Pyroclastic rock Landslide 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences lcsh:Geology Infiltration (hydrology) slope stability monitoring Mining engineering Soil database pyroclastic soil Physical phenomena Slope stability General Earth and Planetary Sciences Monitoring slope stability unsaturated soil Pyroclastic Soil Socioeconomic Framework unsaturated soil Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Geosciences, Vol 9, Iss 1, p 24 (2018) Geosciences Volume 9 Issue 1 |
| ISSN: | 2076-3263 |
| Popis: | Air-fall pyroclastic deposits on steep slopes in Campania (Southern Italy) are periodically subjected to rainfall-induced landslides that may evolve into catastrophic flowslides. To protect built-up areas, early warning systems (EWSs) have been implemented which are essentially based on pluviometric thresholds or models unable to accurately monitor the physical phenomena responsible for flowslide generation in pyroclastic deposits. Over the last 20 years, landslides with no evolution in flows occurred in this area and the alarms generated by existing EWSs in the cases of rainfall were both false and highly costly, thus eroding public trust in EWSs. To improve existing EWSs, two complex models for pyroclastic soils (Cervinara and Sarno) are proposed in this paper. These two models allow correct simulation of the physical processes, such as saturation increase due to rainwater infiltration and mechanical degradation as far as undrained instability, which govern postfailure evolution. The paper concludes with the presentation of a framework proposal to be used in defining a soil database, as well as a framework for flowslide generation forecast to be used for implementation within EWSs. |
| Databáze: | OpenAIRE |
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