Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Does the Darcy-Buckingham Law Apply to Flow through Unsaturated Porous Rock? |
| Abstract | The Darcy-Buckingham (DB) law, critical to the prediction of unsaturated flow, is widely used but has rarely been experimentally tested, and therefore may not be adequate in certain conditions. Failure of this law would imply that the unsaturated hydraulic conductivity is not constant for a given water content, as assumed in nearly all subsurface flow models. This study aims to test the DB law on unsaturated porous rock, complementing the few previous tests, all done on soils. Two lithotypes of calcareous porous rocks were tested. The quasi-steady centrifuge method was used to measure the flux density for different centrifugal driving forces while maintaining essentially constant water content, as required. Any deviations from the direct proportionality of the measured flux and the applied force would indicate a violation of the DB law. Our results show that, for the tested rocks and conditions, no physical phenomena occurred to cause a failure of the DB law. |
| Source | Water (Basel) 12 (10), pp. 1–19 |
| Keywords | Darcy's lawunsaturated flowhydraulic conductivityporous rockcentrifuge |
| Journal | Water (Basel) |
| Editor | Molecular Diversity Preservation International, Basel, |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.3390/w12102668 |
| Authors | Turturro, Antonietta C.; Caputo, Maria C.; Perkins, Kim S.; Nimmo, John R. |
| Text | 439558 2020 10.3390/w12102668 ISI Web of Science WOS 000586166600001 Darcy s law unsaturated flow hydraulic conductivity porous rock centrifuge Does the Darcy Buckingham Law Apply to Flow through Unsaturated Porous Rock Turturro, Antonietta C.; Caputo, Maria C.; Perkins, Kim S.; Nimmo, John R. CNR Natl Res Council; US Geol Survey USGS The Darcy Buckingham DB law, critical to the prediction of unsaturated flow, is widely used but has rarely been experimentally tested, and therefore may not be adequate in certain conditions. Failure of this law would imply that the unsaturated hydraulic conductivity is not constant for a given water content, as assumed in nearly all subsurface flow models. This study aims to test the DB law on unsaturated porous rock, complementing the few previous tests, all done on soils. Two lithotypes of calcareous porous rocks were tested. The quasi steady centrifuge method was used to measure the flux density for different centrifugal driving forces while maintaining essentially constant water content, as required. Any deviations from the direct proportionality of the measured flux and the applied force would indicate a violation of the DB law. Our results show that, for the tested rocks and conditions, no physical phenomena occurred to cause a failure of the DB law. 12 Published version https //www.mdpi.com/2073 4441/12/10/2668 21/09/2020 Lavoro prodotto nell ambito del Progetto di Grande Rilevanza Italia USA Predictive methods for unsaturated zone preferential flow in porous and fractured rock grant number US16GR01 Does the Darcy Buckingham Law Apply to Flow through Unsaturated Porous Rock Water 2020 _Darcy Buckingham.pdf Articolo in rivista Molecular Diversity Preservation International 2073 4441 Water Basel Water Basel Water Basel Water. Basel antoniettacelesteturturro TURTURRO ANTONIETTA CELESTE mariaclementina.caputo CAPUTO MARIA CLEMENTINA |