Document Detail


Darcian preferential water flow and solute transport through bimodal porous systems: experiments and modelling.
MedLine Citation:
PMID:  19042056     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Soils often exhibit a variety of small-scale heterogeneities such as inter-aggregate pores and voids which partition flow into separate regions. In this paper a methodological approach is discussed for characterizing the hydrological behaviour of a heterogeneous clayey-sandy soil in the presence of structural inter-aggregate pores. For the clay soil examined, it was demonstrated that, coupling the transfer function approach for analyzing BTCs and water retention data obtained with different methods from laboratory studies captures the bimodal geometry of the porous system along with the related existence of fast and slow flow paths. To be effectively and reliably applied this approach requires that the predominant effects of the soil hydrological behaviour near saturation be supported by accurate experimental data of both breakthrough curves (BTCs) and hydraulic functions for high water content values. This would allow the separation of flow phases and hence accurate identification of the processes and related parameters.
Authors:
Antonio Coppola; Vincenzo Comegna; Angelo Basile; Nicola Lamaddalena; Gerardo Severino
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Publication Detail:
Type:  Journal Article     Date:  2008-10-17
Journal Detail:
Title:  Journal of contaminant hydrology     Volume:  104     ISSN:  0169-7722     ISO Abbreviation:  J. Contam. Hydrol.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-01-19     Completed Date:  2009-06-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8805644     Medline TA:  J Contam Hydrol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  74-83     Citation Subset:  IM    
Affiliation:
Dept. for Agro-Forestry Systems Management, Hydraulics Division, University of Basilicata, Potenza, Italy. antonio.coppola@unibas.it
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MeSH Terms
Descriptor/Qualifier:
Mechanical Phenomena
Models, Theoretical*
Porosity
Soil
Solutions
Water Movements*
Chemical
Reg. No./Substance:
0/Soil; 0/Solutions

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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