Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | QUASI-STEADY CENTRIFUGE METHOD FOR UNSATURATED HYDRAULIC PROPERTIES |
| Abstract | We have developed the quasi-steady centrifuge (QSC) method as a variation of the steady state centrifuge method that can be implemented simply and inexpensively with greater versatility in terms of sample size and other features. It achieves these advantages by somewhat relaxing the criterion for steadiness of flow through the sample. This compromise entails an increase in measurement uncertainty but to a degree that is tolerable in most applications. We have tested this new approach with an easily constructed apparatus to establish a quasi-steady flow of water in unsaturated porous rock samples spinning in a centrifuge, obtaining measurements of unsaturated hydraulic conductivity and water retention that agree with results of other methods. The QSC method is adaptable to essentially any centrifuge suitable for hydrogeologic applications, over a wide range of sizes and operating speeds. The simplified apparatus and greater adaptability of this method expands the potential for exploring situations that are common in nature but have been the subject of few laboratory investigations. |
| Source | Water resources research 41 (11), pp. 1–5 |
| Keywords | porous rockscentrifugal techniquehydraulic propertiesunsaturated flow |
| Journal | Water resources research |
| Editor | American Geophysical Union., Washington [etc.], Stati Uniti d'America |
| Year | 2005 |
| Type | Articolo in rivista |
| DOI | 10.1029/2005WR003957 |
| Authors | CAPUTO M.C.; NIMMO J.R. |
| Text | 168061 2005 10.1029/2005WR003957 ISI Web of Science WOS 000233589900005 Scopus WRERA porous rocks centrifugal technique hydraulic properties unsaturated flow QUASI STEADY CENTRIFUGE METHOD FOR UNSATURATED HYDRAULIC PROPERTIES CAPUTO M.C.; NIMMO J.R. Maria C. Caputo Water Research Institute IRSA , Consiglio Nazionale delle Ricerche, Bari, Italy John R. Nimmo U.S. Geological Survey, Menlo Park, California, USA We have developed the quasi steady centrifuge QSC method as a variation of the steady state centrifuge method that can be implemented simply and inexpensively with greater versatility in terms of sample size and other features. It achieves these advantages by somewhat relaxing the criterion for steadiness of flow through the sample. This compromise entails an increase in measurement uncertainty but to a degree that is tolerable in most applications. We have tested this new approach with an easily constructed apparatus to establish a quasi steady flow of water in unsaturated porous rock samples spinning in a centrifuge, obtaining measurements of unsaturated hydraulic conductivity and water retention that agree with results of other methods. The QSC method is adaptable to essentially any centrifuge suitable for hydrogeologic applications, over a wide range of sizes and operating speeds. The simplified apparatus and greater adaptability of this method expands the potential for exploring situations that are common in nature but have been the subject of few laboratory investigations. 41 http //www.agu.org/pubs/crossref/2005/2005WR003957.shtml articolo pubblicato QUASI STEADY CENTRIFUGE METHOD FOR UNSATURATED HYDRAULIC PROPERTIES Water_Resour_Res_2005_.pdf Articolo in rivista American Geophysical Union. 0043 1397 Water resources research Water resources research Water resour. res. Water resources research. mariaclementina.caputo CAPUTO MARIA CLEMENTINA TA.P04.005.005 Gestione integrata delle informazioni ambientali |