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Titolo:
Pore-throat size distributions in Permo-Triassic sandstones from the United Kingdom and some implications for contaminant hydrogeology
Autore:
Bloomfield, JP; Gooddy, DC; Bright, MI; Williams, PJ;
Indirizzi:
British Geol Survey, Wallingford OX10 8BB, Oxon, England British Geol Survey Wallingford Oxon England OX10 8BB 8BB, Oxon, England Univ Coll London, London WC1E 6BT, England Univ Coll London London England WC1E 6BT ondon, London WC1E 6BT, England
Titolo Testata:
HYDROGEOLOGY JOURNAL
fascicolo: 3, volume: 9, anno: 2001,
pagine: 219 - 230
SICI:
1431-2174(200106)9:3<219:PSDIPS>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL HYDRAULIC-PROPERTIES; CAPILLARY-PRESSURE; SANDY AQUIFER; POROUS-MEDIA; PERMEABILITY; MODEL; FLOW; CONDUCTIVITY; GROUNDWATER; PREDICTION;
Keywords:
laboratory experiments; pore-throat size distribution; sandstones; groundwater contamination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Bloomfield, JP British Geol Survey, Wallingford OX10 8BB, Oxon, England British Geol Survey Wallingford Oxon England OX10 8BB land
Citazione:
J.P. Bloomfield et al., "Pore-throat size distributions in Permo-Triassic sandstones from the United Kingdom and some implications for contaminant hydrogeology", HYDROGEOL J, 9(3), 2001, pp. 219-230

Abstract

Pore-throat size distributions (PSDs) from mercury injection capillary pressure (MICP) tests have been used to characterise 153 samples of Permo-Triassic sandstones from the United Kingdom. The PSDs have been parameterised using the Brooks-Corey and van Genuchten functions. Pore-throat sizes are inthe range 0.01-427 mum, and dominant pore-throat sizes range from about 0.1-90 mum. Values of lambda, the Brooks-Corey pore size distribution index, range from 0.002-2.27, and values of mi the van Genuchten pore-size distribution index, range from 0.03-0.92. A number of classes of sandstone can be recognised on the basis of trends in the fitted parameters. The van Genuchten function provides the most effective method for classifying different sandstones. Additionally, a cross-plot of gas permeability against displacement pressure (derived from the van Genuchten function) shows that the data fall into two distinct subpopulations. The frequency distribution of a larger population of sandstone permeabilities can be modelled using the mean andstandard deviation of the two sub-populations identified in the MICP study, assuming that the sub-populations are approximated by log-normal distributions. The distribution of sandstones with small pore throat sizes is critical to the fate of pathogens and immiscible phase contaminants in the aquifer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 15:34:06