An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils
For modeling physical and mechanical phenomena that occur in unsaturated soils, it is very important to identify the correct relationship between suction and water content. This relationship defines the soil water retention curve (SWRC). Its shape depends on numerous factors, including grain size co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-03-01
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| Series: | Hydrology |
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| Online Access: | https://www.mdpi.com/2306-5338/7/1/14 |
| _version_ | 1818842772473380864 |
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| author | Giovanna Capparelli Gennaro Spolverino |
| author_facet | Giovanna Capparelli Gennaro Spolverino |
| author_sort | Giovanna Capparelli |
| collection | DOAJ |
| description | For modeling physical and mechanical phenomena that occur in unsaturated soils, it is very important to identify the correct relationship between suction and water content. This relationship defines the soil water retention curve (SWRC). Its shape depends on numerous factors, including grain size composition, particles’ thickening state and, above all, the hydraulic and stress soil history. In particular, the SWRC in wetting phase differs from SWRC in drying phase, showing a hysteretic behavior. Hysteresis domain is defined by the main drying and wetting curves; when moving from one phase to another, relationship between suction and water content defines secondary curves within them. In this paper, a laboratory experiment was carried out to determine main wetting and drying curves of a pyroclastic ash sample from southern Italy. In same site of the sample collection, a monitoring station was installed that measured the suction and water content values. The experimental curves were compared with the data recorded on the site. In this paper, moreover, an empirical procedure is proposed to model secondary curves (or scanning curves) within the hysteresis domain. The scanning curves obtained with this method were compared with data collected by the in-situ monitoring network, revealing the ability to describe a situation realistically with a good adaptation. With this procedure, it is therefore possible to minimize errors since it covers a hysteretic behavior. |
| first_indexed | 2024-12-19T04:47:17Z |
| format | Article |
| id | doaj.art-e0e568665e6a4dca9c5f1c77b7d7c44e |
| institution | Directory Open Access Journal |
| issn | 2306-5338 |
| language | English |
| last_indexed | 2024-12-19T04:47:17Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Hydrology |
| spelling | doaj.art-e0e568665e6a4dca9c5f1c77b7d7c44e2022-12-21T20:35:27ZengMDPI AGHydrology2306-53382020-03-01711410.3390/hydrology7010014hydrology7010014An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic SoilsGiovanna Capparelli0Gennaro Spolverino1Dipartimento di Ingegneria Informatica, Modellistica, Elettronica e Sistemistica, Università della Calabria, 87036 Rende, ItalyDipartimento di Ingegneria Informatica, Modellistica, Elettronica e Sistemistica, Università della Calabria, 87036 Rende, ItalyFor modeling physical and mechanical phenomena that occur in unsaturated soils, it is very important to identify the correct relationship between suction and water content. This relationship defines the soil water retention curve (SWRC). Its shape depends on numerous factors, including grain size composition, particles’ thickening state and, above all, the hydraulic and stress soil history. In particular, the SWRC in wetting phase differs from SWRC in drying phase, showing a hysteretic behavior. Hysteresis domain is defined by the main drying and wetting curves; when moving from one phase to another, relationship between suction and water content defines secondary curves within them. In this paper, a laboratory experiment was carried out to determine main wetting and drying curves of a pyroclastic ash sample from southern Italy. In same site of the sample collection, a monitoring station was installed that measured the suction and water content values. The experimental curves were compared with the data recorded on the site. In this paper, moreover, an empirical procedure is proposed to model secondary curves (or scanning curves) within the hysteresis domain. The scanning curves obtained with this method were compared with data collected by the in-situ monitoring network, revealing the ability to describe a situation realistically with a good adaptation. With this procedure, it is therefore possible to minimize errors since it covers a hysteretic behavior.https://www.mdpi.com/2306-5338/7/1/14soil water retention curveshysteresis between main water retention curvesempirical modeling of hysteretic |
| spellingShingle | Giovanna Capparelli Gennaro Spolverino An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils Hydrology soil water retention curves hysteresis between main water retention curves empirical modeling of hysteretic |
| title | An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils |
| title_full | An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils |
| title_fullStr | An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils |
| title_full_unstemmed | An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils |
| title_short | An Empirical Approach for Modeling Hysteresis Behavior of Pyroclastic Soils |
| title_sort | empirical approach for modeling hysteresis behavior of pyroclastic soils |
| topic | soil water retention curves hysteresis between main water retention curves empirical modeling of hysteretic |
| url | https://www.mdpi.com/2306-5338/7/1/14 |
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