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Titolo:
Solute transport modeled with Green's functions with application to persistent solute sources
Autore:
Leij, FJ; Priesack, E; Schaap, MG;
Indirizzi:
USDA ARS, US Salin Lab, Riverside, CA 92507 USA USDA ARS Riverside CA USA92507 RS, US Salin Lab, Riverside, CA 92507 USA GSF, Natl Res Ctr Environm & Hlth, Inst Soil Ecol, D-85758 Oberschleissheim, Germany GSF Oberschleissheim Germany D-85758 , D-85758 Oberschleissheim, Germany
Titolo Testata:
JOURNAL OF CONTAMINANT HYDROLOGY
fascicolo: 1-2, volume: 41, anno: 2000,
pagine: 155 - 173
SICI:
0169-7722(20000131)41:1-2<155:STMWGF>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SATURATED POROUS-MEDIA; PHASE LIQUID POOL; CONTAMINANT TRANSPORT; DISSOLUTION; DISPERSION; COLUMNS; AQUIFER;
Keywords:
Green's functions; advection-dispersion equation; solute transport; persistent contamination; analytical modeling;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Leij, FJ USDA ARS, US Salin Lab, 450 W Big Springs Rd, Riverside, CA 92507USA USDA ARS 450 W Big Springs Rd Riverside CA USA 92507 CA 92507 USA
Citazione:
F.J. Leij et al., "Solute transport modeled with Green's functions with application to persistent solute sources", J CONTAM HY, 41(1-2), 2000, pp. 155-173

Abstract

Analytical models can be valuable tools to investigate solute transport inporous media. The application of analytical solutions is limited by the perception that they are too cumbersome to derive while their implementation rests on assumptions that are too restrictive. The Green's function method (GFM) was applied to facilitate analytical solution of the advection-dispersion equation (ADE) for solute transport in uniform porous media with steady one- or two-dimensional flow. The GFM conveniently handles different boundary and initial conditions as well as multi-dimensional problems. Concise expressions are possible for the solute concentration with the GFM. This paper provides a general framework to efficiently formulate analytical solutions for many transport problems. Expressions for the longitudinal and transversal Green's function are presented that can be inserted in the general expression to solve a wide variety of transport problems in infinite, semi-infinite, and finite media. These solutions can be used to elucidate transport phenomena, estimate transport parameters, evaluate numerical solution procedures and simulate the movement and fate of solutes. An illustration of the GFM is provided by the analytical modeling of transport from a planar source of persistent, long-lasting contamination. Such a source may be used to represent dissolution from a pool of a non-aqueous phase liquid (NAPL). Analytical solutions are obtained for a first-, second-, and third-type condition in case of a planar source; the third-type condition is due to downward flow or rate-limited dissolution. Several examples are presented to show the effect of source conditions, the sensitivity of NAPL dissolution to transport parameters included in the Damkohler and Peclet numbers, and upstream dispersion. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 18/09/20 alle ore 16:59:59