Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5714
DC Field | Value | Language |
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dc.contributor.authorall | Giraldi, D.; Department of Civil Engineering – University of Pisa, Pisa, Italy | en |
dc.contributor.authorall | De' Michieli Vitturi, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.authorall | Zaramella, M.; Department of Hydraulic, Maritime, Environmental and Geotechnical Engineering – University of Padua, Padova, Italy | en |
dc.contributor.authorall | Marion, A.; Department of Hydraulic, Maritime, Environmental and Geotechnical Engineering – University of Padua, Padova, Italy | en |
dc.contributor.authorall | Iannelli, R.; Department of Civil Engineering – University of Pisa, Pisa, Italy | en |
dc.date.accessioned | 2010-01-21T13:56:46Z | en |
dc.date.available | 2010-01-21T13:56:46Z | en |
dc.date.issued | 2009-02-09 | en |
dc.identifier.uri | http://hdl.handle.net/2122/5714 | en |
dc.description.abstract | Typical unsteady unsaturated conditions can profoundly affect the hydrodynamics of vertical subsurface flow constructed wetlands. In this study we analyzed the hydrodynamics of a 33 m2 vertical flow pilot plant, treating municipal secondary effluents. Three different saturation conditions were analyzed under several constant flux regimes: complete saturation, partial saturation with the free water table 20 cm over the bottom of the bed, and complete drainage. Tracer tests were performed in steady state conditions by dosing rhodamine WT as square input signals. Breakthrough curves were analyzed by means of both a classical residence time distribution analysis and an originally developed numerical plug-flow model with longitudinal dispersion adapted to the unsaturated conditions. We found that the degree of global mixing in the vertical flow constructed wetland increased as the water content increased; this effect was controlled by the hydraulic residence time of the system. Conversely, the degree of local mixing was inversely affected by water content; the dispersivity was 4.5, 10, and 14 cm for fully saturated, partially saturated and draining conditions, respectively. We explain the dependency of dispersivity on water content in physical terms; however, further studies are needed to mathematically include this relationship in numerical models that describe the behaviour of vertical flow constructed wetlands. | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier | en |
dc.relation.ispartof | Ecological Engineering | en |
dc.relation.ispartofseries | 2/35(2009) | en |
dc.relation.isversionof | http://hdl.handle.net/2122/4540 | en |
dc.subject | Constructed wetlands | en |
dc.subject | Vertical flow | en |
dc.subject | Hydrodynamics | en |
dc.subject | Tracer tests | en |
dc.subject | Rhodamine WT | en |
dc.subject | Modelling | en |
dc.subject | Unsaturated flow | en |
dc.subject | Dispersivity | en |
dc.title | Hydrodynamics of vertical subsurface flow constructed wetlands: Tracer tests with rhodamine WT and numerical modelling | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 265-273 | en |
dc.subject.INGV | 03. Hydrosphere::03.02. Hydrology::03.02.06. Water resources | en |
dc.subject.INGV | 05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous | en |
dc.subject.INGV | 05. General::05.08. Risk::05.08.01. Environmental risk | en |
dc.identifier.doi | 10.1016/j.ecoleng.2008.06.004 | en |
dc.description.obiettivoSpecifico | 3.8. Geofisica per l'ambiente | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | reserved | en |
dc.contributor.author | Giraldi, D. | en |
dc.contributor.author | De' Michieli Vitturi, M. | en |
dc.contributor.author | Zaramella, M. | en |
dc.contributor.author | Marion, A. | en |
dc.contributor.author | Iannelli, R. | en |
dc.contributor.department | Department of Civil Engineering – University of Pisa, Pisa, Italy | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.department | Department of Hydraulic, Maritime, Environmental and Geotechnical Engineering – University of Padua, Padova, Italy | en |
dc.contributor.department | Department of Hydraulic, Maritime, Environmental and Geotechnical Engineering – University of Padua, Padova, Italy | en |
dc.contributor.department | Department of Civil Engineering – University of Pisa, Pisa, Italy | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Department of Civil Engineering, University of Pisa, Pisa, Italy | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | - |
crisitem.author.dept | Department of Hydraulic, Maritime, Environmental and Geotechnical Engineering – University of Padua, Padova, Italy | - |
crisitem.author.dept | Department of Hydraulic, Maritime, Environmental and Geotechnical Engineering, University of Padova, Padova, Italy | - |
crisitem.author.dept | Department of Civil Engineering, University of Pisa, Pisa, Italy | - |
crisitem.author.orcid | 0000-0002-6750-9245 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 03. Hydrosphere | - |
crisitem.classification.parent | 05. General | - |
crisitem.classification.parent | 05. General | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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EE_Giraldi at al_2009.pdf | 448.92 kB | Adobe PDF |
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