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Article

Laboratory and Physical Prototype Tests for the Investigation of Hydraulic Hysteresis of Pyroclastic Soils

1
Dipartimento di Ingegneria Civile, Edile ed Ambientale (DICEA), Università di Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
2
REgional Model and geo-Hydrological Impacts, Centro Euro-Mediterraneo sui Cambiamenti Climatici, Italy, Via Thomas Alva Edison, 81100 Caserta, Italy
*
Author to whom correspondence should be addressed.
Geosciences 2020, 10(8), 320; https://doi.org/10.3390/geosciences10080320
Received: 23 June 2020 / Revised: 11 August 2020 / Accepted: 13 August 2020 / Published: 17 August 2020
(This article belongs to the Special Issue Innovative Strategies for Sustainable Mitigation of Landslide Risk)
Proper soil water retention curves (SWRCs) are necessary for a fair analysis of groundwater flow in unsaturated slopes. The question is whether hydraulic parameters operating in situ can be reliably determined from laboratory tests or physical prototype models in order to interpret and predict soil water distributions in the field. In this paper, some results obtained by tests at different scales (testing on laboratory specimens and a physical prototype) are presented to explore the hydraulic behavior of pyroclastic soils. A theoretical interpretation of the observed behavior in the laboratory and using a physical prototype is proposed by adopting the hysteretic model of Lenhard and Parker. For each tested soil, the main hysteretic loop determined by interpreting experimental tests (at laboratory and prototype scales) overlaps with paths detected by coupling the field measurements of matric suction and water content collected at the site at the same depth. From these results, the physical prototype (medium scale) and the soil specimen (small scale) seem to be acceptable for determinations of SWRC, provided that the air entrapment value is well known. View Full-Text
Keywords: hydraulic soil behavior; hydraulic hysteresis; in situ monitoring; lysimeter; pyroclastic unsaturated soil hydraulic soil behavior; hydraulic hysteresis; in situ monitoring; lysimeter; pyroclastic unsaturated soil
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MDPI and ACS Style

Pirone, M.; Reder, A.; Rianna, G.; Pagano, L.; Nicotera, M.V.; Urciuoli, G. Laboratory and Physical Prototype Tests for the Investigation of Hydraulic Hysteresis of Pyroclastic Soils. Geosciences 2020, 10, 320. https://doi.org/10.3390/geosciences10080320

AMA Style

Pirone M, Reder A, Rianna G, Pagano L, Nicotera MV, Urciuoli G. Laboratory and Physical Prototype Tests for the Investigation of Hydraulic Hysteresis of Pyroclastic Soils. Geosciences. 2020; 10(8):320. https://doi.org/10.3390/geosciences10080320

Chicago/Turabian Style

Pirone, Marianna, Alfredo Reder, Guido Rianna, Luca Pagano, Marco V. Nicotera, and Gianfranco Urciuoli. 2020. "Laboratory and Physical Prototype Tests for the Investigation of Hydraulic Hysteresis of Pyroclastic Soils" Geosciences 10, no. 8: 320. https://doi.org/10.3390/geosciences10080320

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