NDLI: Capillary barrier effects in unsaturated layered soils, with special reference to the pyroclastic veneer of the Pizzo d’Alvano, Campania, Italy

Content Provider	Springer Nature Link
Author	Mancarella, D. Simeone, V.
Copyright Year	2012
Abstract	The paper reports a study on the capillary barrier effects in a layered pyroclastic deposit with different permeabilities. During prolonged low intensity rainfall, such phenomena lead to a significant increase in saturation in the least permeable soil layers. This is a common situation on the slopes of Pizzo D’Alvano (Campania, Southern Italy) where severe landslides were triggered in May 1998, and in many other geological environments where geological, sedimentological, geomorphologic and pedological processes may have produced a sequence of soils with different hydraulic conductivity. The results of laboratory column infiltration tests and evidence of capillary barrier effects are presented and used in the calibration of numerical unsaturated flow models.L’article présente une étude sur les effets de barrière capillaire dans des dépôts pyroclastiques stratifiés de différentes perméabilités. Pendant des pluies prolongées de faible intensité, de tels phénomènes conduisent à une augmentation significative du degré de saturation dans les niveaux les moins perméables. C’est une situation commune sur les pentes du Pizzo d’Alvano (Campanie, Italie du Sud), où des glissements importants eurent lieu en mai 1988, ainsi que dans de nombreux autres contextes géologiques présentant des séquences de sols de différentes conductivités hydrauliques résultant de divers processus géologiques, sédimentologiques, géomorphologiques et pédologiques. Les résultats de tests d’infiltration en colonnes au laboratoire et la mise en évidence d’effets de barrière capillaire sont présentés et utilisés pour la calibration de modèles numériques d’écoulement en milieu non saturé.
Starting Page	791
Ending Page	801
Page Count	11
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	71
Issue Number	4
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-11-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Barrières capillaires Sols stratifiés Dépôts pyroclastiques Infiltration Cohésion apparente Succion Geotechnical Engineering & Applied Earth Sciences Geoengineering, Foundations, Hydraulics Nature Conservation Geoecology/Natural Processes
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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